Leases [Abstract]
Leases
Lessee, Operating Leases [Text Block]
Operating leases, 2019 (three months remaining)
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year
Operating leases, 2020
Lessee, Operating Lease, Liability, Payments, Due Year Two
Operating leases, 2021
Lessee, Operating Lease, Liability, Payments, Due Year Three
Operating leases, 2022
Lessee, Operating Lease, Liability, Payments, Due Year Four
Operating leases, 2023
Lessee, Operating Lease, Liability, Payments, Due Year Five
Operating leases, 2024 and beyond
Lessee, Operating Lease, Liability, Payments, Due after Year Five
Operating leases, total minimum payments
Lessee, Operating Lease, Liability, Payments, Due
Operating leases, interest
Lessee, Operating Lease, Liability, Undiscounted Excess Amount
Operating Leases, present value of lease liabilities
Operating Lease, Liability
Restructuring and Related Activities [Abstract]
Project reserve
Restructuring Reserve
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Supplemental Balance Sheet Disclosures [Text Block]
Supplemental Balance Sheet Disclosures [Text Block]
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments [Table]
Schedule of Long-term Debt Instruments [Table]
Long-term Debt, Type [Axis]
Long-term Debt, Type [Axis]
Long-term Debt, Type [Domain]
Long-term Debt, Type [Domain]
Debt Instrument [Axis]
Debt Instrument [Axis]
Debt Instrument, Name [Domain]
Debt Instrument, Name [Domain]
Senior Notes Due November 2019
Senior Notes Due November 2019 [Member]
Senior Notes Due November 2019
Senior Notes Due December 2020
Senior Notes Due December 2020 [Member]
Senior Notes Due December 2020
Senior Notes Due May 2021
Senior Notes Due May 2021 [Member]
Senior Notes Due May 2021
Senior Notes Due May 2023
Senior Notes Due May 2023 [Member]
Senior Notes Due May 2023
Variable Rate [Axis]
Variable Rate [Axis]
Variable Rate [Domain]
Variable Rate [Domain]
Debt Instrument, Redemption, Period [Axis]
Debt Instrument, Redemption, Period [Axis]
Debt Instrument, Redemption, Period [Domain]
Debt Instrument, Redemption, Period [Domain]
Statistical Measurement [Axis]
Statistical Measurement [Axis]
Statistical Measurement [Domain]
Statistical Measurement [Domain]
Debt Instrument [Line Items]
Debt Instrument [Line Items]
Debt repurchase amount
Debt Instrument, Repurchase Amount
Interest Expense, Debt
Interest Expense, Debt
Debt instrument interest rate stated percentage
Debt Instrument, Interest Rate, Stated Percentage
Share-based Payment Arrangement [Abstract]
Schedule of Compensation Expense for Equity-Based Programs and Related Income Tax Benefits
Schedule of Compensation Expense for Equity Programs and Related Tax Benefits [Table Text Block]
Schedule of Compensation Expense for Equity Programs and Related Tax Benefits [Table Text Block]
Income Tax Disclosure [Abstract]
Reconciliation of Total Gross Unrecognized Tax Benefits
Summary of Positions for which Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Table Text Block]
Transfers and Servicing of Financial Assets [Abstract]
Transfer of Financial Assets Accounted for as Sales [Table]
Transfer of Financial Assets Accounted for as Sales [Table]
Transfer of Accounts Receivable Programs [Axis]
Transfer Of Accounts Receivable Programs [Axis]
Transfer of Receivable Programs [Axis]
Transfer of Accounts Receivable Programs [Domain]
Transfer Of Accounts Receivable Programs [Domain]
[Domain] for Transfer of Accounts Receivable Programs [Axis]
Monetization Program
Monetization Program [Member]
Monetization Program.
Kellogg Foreign Subsidiaries Other Program
Kellogg Foreign Subsidiaries Other Program [Member]
Other financing receivable programs through Kellogg foreign subsidiaries
Qualitative and Quantitative Information, Transferred Financial Assets
Qualitative and Quantitative Information, Transferor's Continuing Involvement, Transferred Financial Assets, by Transfer or Transferee [Axis]
Qualitative and Quantitative Information, Transferred Financial Assets
Qualitative and Quantitative Information, Transferor's Continuing Involvement in Transferred Financial Assets, Transfer or Transferee [Domain]
Sold And Outstanding
Accounts Receivable Sold And Outstanding [Member]
Accounts Receivable Sold And Outstanding [Member]
Maximum [Member]
Maximum [Member]
Amendments To Receivable Sales Agreement [Axis]
Amendments To Receivable Sales Agreement [Axis]
Amendments To Receivable Sales Agreement [Axis]
Amendments To Receivable Sales Agreement [Domain]
Amendments To Receivable Sales Agreement [Domain]
[Domain] for Amendments To Receivable Sales Agreement [Axis]
Income Statement Location [Axis]
Income Statement Location [Axis]
Income Statement Location [Domain]
Income Statement Location [Domain]
Other income (expense)
Other Nonoperating Income (Expense) [Member]
Transfer of Financial Assets Accounted for as Sales [Line Items]
Transfer of Financial Assets Accounted for as Sales [Line Items]
Transfers of Accounts Receivable Agreements
Transfers Of Accounts Receivable Agreements
Amount of cash proceeds that can be collected under transfer agreement
Transfer of Financial Assets Accounted for as Sales, Amount Derecognized
Transfer of Financial Assets Accounted for as Sales, Amount Derecognized
Gain (Loss) on Sale of Accounts Receivable
Gain (Loss) on Sale of Accounts Receivable
Schedule of Restructuring and Related Costs [Table]
Schedule of Restructuring and Related Costs [Table]
Consolidation Items [Axis]
Consolidation Items [Axis]
Consolidation Items [Domain]
Consolidation Items [Domain]
Segments [Axis]
Segments [Axis]
Segments [Domain]
Segments [Domain]
Business Acquisition [Axis]
Business Acquisition [Axis]
Business Acquisition, Acquiree [Domain]
Business Acquisition, Acquiree [Domain]
Restructuring Type [Axis]
Restructuring Type [Axis]
Type of Restructuring [Domain]
Type of Restructuring [Domain]
Restructuring Plan [Axis]
Restructuring Plan [Axis]
Restructuring Plan [Domain]
Restructuring Plan [Domain]
COGS
Cost of Sales [Member]
Selling, General and Administrative Expenses
Selling, General and Administrative Expenses [Member]
Other Comprehensive Income Location [Axis]
Other Comprehensive Income Location [Axis]
Other Comprehensive Income Location [Domain]
Other Comprehensive Income Location [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring Cost and Reserve [Line Items]
Restructuring charges
Restructuring and Related Cost, Incurred Cost
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill [Table]
Schedule of Goodwill [Table]
Kashi
Kashi [Member]
Kashi reporting unit.
Europe transfer to AMEA
EuropeTransferToAMEA [Member]
Europe transfer to AMEA.
North America
North America [Member]
Reporting Unit [Axis]
Reporting Unit [Axis]
Reporting Unit [Domain]
Reporting Unit [Domain]
Goodwill [Line Items]
Goodwill [Line Items]
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount
Goodwill
Goodwill
Divestiture Goodwill
Goodwill, Written off Related to Sale of Business Unit
Divestiture net intangibles
Indefinite-lived Intangible Assets, Written off Related to Sale of Business Unit
Indefinite-lived Intangible Assets Acquired
Indefinite-lived Intangible Assets Acquired
Schedule of supplemental operating lease information
ScheduleOfSupplementalOperatingLeaseInformation [Table Text Block]
Tabular disclosure of supplemental operating lease information including operating cash flows from operating leases, right-of-use assets obtained in exchange for new operating leases, weighted-average remaining lease term for operating leases and weighted-average discount rate for operating leases.
Operating leases future maturities
Lessee, Operating Lease, Liability, Maturity [Table Text Block]
Restructuring and Cost Reduction Activities
Restructuring and Related Activities Disclosure [Text Block]
Trade receivables
Accounts Receivable, before Allowance for Credit Loss, Current
Allowance for doubtful accounts
Accounts Receivable, Allowance for Credit Loss, Current
Redundable income taxes
Income Taxes Receivable
Other receivables
Other Receivables
Accounts receivable, net
Accounts Receivable, after Allowance for Credit Loss, Current
Raw materials and supplies
Inventory, Raw Materials and Supplies, Net of Reserves
Finished goods and materials in process
Inventory, Finished Goods and Work in Process, Net of Reserves
Inventories
Inventory, Net
Property
Property, Plant and Equipment, Gross
Accumulated depreciation
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment
Property, net
Property, Plant and Equipment, Net
Pension
Assets for Plan Benefits, Defined Benefit Plan
Deferred income taxes
Deferred Tax Assets, Net, Noncurrent
Other
Other Assets, Miscellaneous, Noncurrent
Other assets
Other Assets, Noncurrent
Accrued income taxes
Accrued Income Taxes, Current
Accrued salaries and wages
Accrued Salaries, Current
Accrued advertising and promotion
Accrued Marketing Costs, Current
Other
Other Accrued Liabilities, Current
Other current liabilities
Other Liabilities, Current
Income taxes payable
Accrued Income Taxes, Noncurrent
Nonpension postretirement benefits
Liability, Other Postretirement Defined Benefit Plan, Noncurrent
Other
Other Sundry Liabilities, Noncurrent
Other liabilities
Other Liabilities, Noncurrent
Components of Notes Payable
Schedule of Short-term Debt [Table Text Block]
Acquisitions, West Africa Investments, Goodwill and Other Intangible Assets [Abstract]
Acquisitions, goodwill and other intangible assets disclosure abstract.
Schedule of Finite-Lived Intangible Assets [Table]
Schedule of Finite-Lived Intangible Assets [Table]
Europe
Europe [Member]
Latin America
Latin America [Member]
AMEA
AMEA [Member]
Asia, Middle East and Africa reportable operating segment.
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets [Roll Forward]
Finite-lived Intangible Assets [Roll Forward]
Gross carrying amount, beginning balance
Finite-Lived Intangible Assets, Gross
Additions
Finite-lived Intangible Assets Acquired
Divestiture
FiniteLivedIntangibleAssetsWrittenOffRelatedToSaleOfBusinessUnit
Amount of divestiture of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually and separately recognized.
Purchase price allocation adjustment
Intangible Transfer
Amount of transfers into (out of) an intangible asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.
Currency translation adjustment
Finite Lived Intangible Assets, Foreign Currency Translation Gain (Loss)
Gross carrying amount, ending balance
Accumulated amortization, beginning balance
Finite-Lived Intangible Assets, Accumulated Amortization
Amortization
Amortization of Intangible Assets
Divestiture amortization
AmortizationOfIntangibleAssetsWrittenOffRelatedToSaleOfBusinessUnit
Write-off of accumulated amortization associated with reclassification to assets held for sale.
Currency translation adjustment
Finite Lived Intangible Assets Accumulated Amortization Foreign Currency Gain Loss
Currency translation adjustment for accumulated amortization.
Accumulated amortization, ending balance
Intangible assets subject to amortization net, beginning balance
Finite-Lived Intangible Assets, Net
Additions
Finite Lived Intangible Assets Acquired Net
Amount of increase in assets, excluding financial assets, lacking physical substance with definite life, from an acquisition.
Purchase price allocation adjustment
Amortization
Amortization Of Intangibles Net
The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.
Currency translation adjustment
Finite Lived Intangible Assets Foreign Currency Gain Loss Net
Net finite lived intangible assets cumulated translation adjustment.
Intangible assets subject to amortization net, ending balance
Currently estimated aggregate annual amortization expense for full-year
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months
Accounting Policies [Abstract]
New Accounting Pronouncements or Change in Accounting Principle [Table]
New Accounting Pronouncements or Change in Accounting Principle [Table]
Equity Components [Axis]
Equity Components [Axis]
Equity Component [Domain]
Equity Component [Domain]
AOCI
AOCI Including Portion Attributable to Noncontrolling Interest [Member]
Retained earnings
Retained Earnings [Member]
Cash Flow Location [Axis]
Cash Flow Location [Axis]
Cash Flow Location [Axis]
Cash Flow Location [Domain]
Cash Flow Location [Domain]
[Domain] for Cash Flow Location [Axis]
Impact of new accounting standards
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification of tax effects relating to U.S. tax reform
TaxCutsandJobsActReclassificationfromAOCIToRetainedEarningsTaxEffect
Tax Cuts and Jobs Act reclassification from AOCI to retained earnings tax effect.
Operating lease right-of-use assets
Operating Lease, Right-of-Use Asset
Operating lease liabilities
Obligations placed in accounts payable tracking system
Payables Placed On Tracking System
Amount of payables financed by suppliers that had been placed on the accounts payable tracking system which facilitates participating suppliers' ability to finance payment obligations from the company with designated third party financial institutions.
Obligations sold by participating suppliers
Payables Financed By Participating Suppliers
Amount of payment obligations sold to participating financial institution that were previously outstanding in the accounts payable tracking system.
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Granted (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Granted, weighted-average exercise price (in dollars per share)
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price
Subsequent Events [Abstract]
Subsequent Event [Table]
Subsequent Event [Table]
Disposal Group Name [Axis]
Disposal Group Name [Axis]
Disposal Group Name [Domain]
Disposal Group Name [Domain]
Cookies, fruit and fruit-flavored snacks, pie crusts and ice cream cones businesses
Cookies Fruit And Fruit Snacks Businesses [Member]
Cookies, fruit and fruit snacks, pie crusts and ice cream cones businesses.
Subsequent Event Type [Axis]
Subsequent Event Type [Axis]
Subsequent Event Type [Domain]
Subsequent Event Type [Domain]
Subsequent Event [Line Items]
Subsequent Event [Line Items]
Retirement Benefits [Abstract]
Components of Plan Benefit Expense
Schedule of Defined Benefit Plans Disclosures [Table Text Block]
Contributions to Employee Benefit Plans
Schedule of Contributions to Employee Benefit Plans [Table Text Block]
Schedule of Contributions to Employee Benefit Plans [Table Text Block]
Schedule of Defined Benefit Plans Disclosures [Table]
Schedule of Defined Benefit Plans Disclosures [Table]
Retirement Plan Type [Axis]
Retirement Plan Type [Axis]
Retirement Plan Type [Domain]
Retirement Plan Type [Domain]
Pension
Pension Plan [Member]
Other Nonpension Postretirement
Other Nonpension Postretirement [Member]
Other Nonpension Postretirement [Member]
Postemployment
Postemployment [Member]
Postemployment [Member]
Minimum [Member]
Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Disclosure [Line Items]
Service cost
Defined Benefit Plan, Service Cost
Interest cost
Defined Benefit Plan, Interest Cost
Expected return on plan assets
Defined Benefit Plan, Expected Return (Loss) on Plan Assets
Amortization of unrecognized prior service cost (gain)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)
Recognized net (gain) loss
Defined Benefit Plan, Amortization of Gain (Loss)
Net periodic benefit cost
Defined Benefit Plan Period Cost Gross
Periodic benefit costs gross
Curtailment (gain) loss
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment
Total plan benefit (income) expense
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)
Basis of presentation
Basis of Accounting, Policy [Policy Text Block]
Accounts payable
Payables Tracking System Policy [Policy Text Block]
Describes an entity's policy to account for its agreement with a third party to provide an accounts payable tracking system which facilitates participating suppliers' ability to finance payment obligations from the company with designated third party financial institutions.
New accounting standards adopted and accounting standards to be adopted in future periods
New Accounting Pronouncements, Policy [Policy Text Block]
Income Tax Contingency [Table]
Income Tax Contingency [Table]
Income Tax Authority [Axis]
Income Tax Authority [Axis]
Income Tax Authority [Domain]
Income Tax Authority [Domain]
Income Tax Authority, Name [Axis]
Income Tax Authority, Name [Axis]
Income Tax Authority, Name [Domain]
Income Tax Authority, Name [Domain]
Tax Period [Axis]
Tax Period [Axis]
Tax Period [Domain]
Tax Period [Domain]
Income Tax Contingency [Line Items]
Income Tax Contingency [Line Items]
Income tax related interest accrued
Income Tax Examination, Penalties and Interest Accrued
Tax settlement
Tax Adjustments, Settlements, and Unusual Provisions
Derivative Instruments and Fair Value Measurements [Abstract]
Derivative instruments and fair value measurements
Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table]
Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table]
Derivative Instrument [Axis]
Derivative Instrument [Axis]
Derivative Contract [Domain]
Derivative Contract [Domain]
Foreign currency exchange contracts
Foreign Exchange Contract [Member]
Cross currency interest rate contract
Cross Currency Interest Rate Contract [Member]
Interest rate contracts
Interest Rate Contract [Member]
Commodity contracts
Commodity Contract [Member]
Derivatives, Fair Value [Line Items]
Derivatives, Fair Value [Line Items]
Notional amount of derivative
Derivative, Notional Amount
Equity [Abstract]
Derivative Instruments, Gain (Loss) [Table]
Derivative Instruments, Gain (Loss) [Table]
Financial Instrument [Axis]
Financial Instrument [Axis]
Financial Instruments [Domain]
Financial Instruments [Domain]
Corporate bonds
Corporate Debt Securities [Member]
Reclassification out of Accumulated Other Comprehensive Income [Axis]
Reclassification out of Accumulated Other Comprehensive Income [Axis]
Reclassification out of Accumulated Other Comprehensive Income [Domain]
Reclassification out of Accumulated Other Comprehensive Income [Domain]
Reclassification out of Accumulated Other Comprehensive Income
Reclassification out of Accumulated Other Comprehensive Income [Member]
(Gains) losses on cash flow hedges
Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest [Member]
Amortization of postretirement and postemployment benefits
Accumulated Defined Benefit Plans Adjustment Including Portion Attributable to Noncontrolling Interest [Member]
(Gains) losses on available-for-sale securities
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Including Noncontrolling Interest [Member]
Other income (expense), net
Other Income (Expense), Net [Member]
Other income (expense), net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) [Line Items]
COGS
Cost of Goods and Services Sold
SG&A
Selling, General and Administrative Expense
Interest expense
Interest and Debt Expense
Net experience (gain) loss
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax
Prior service cost
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax
Other (Income) expense
Other Nonoperating Income (Expense)
Total before tax
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest
Tax expense (benefit)
Income Tax Expense (Benefit)
Net income
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest
Statement of Financial Position [Abstract]
Current assets
Assets, Current [Abstract]
Cash and cash equivalents
Cash and Cash Equivalents, at Carrying Value
Accounts receivable, net
Inventories
Other current assets
Other Assets, Current
Current assets held for sale
Disposal Group, Including Discontinued Operation, Assets, Current
Total current assets
Assets, Current
Property, net
Other intangibles, net
Intangible Assets, Net (Excluding Goodwill)
Investments in unconsolidated entities
Equity Method Investments
Other assets
Noncurrent assets held for sale
Disposal Group, Including Discontinued Operation, Assets, Noncurrent
Total assets
Assets
Current liabilities
Liabilities, Current [Abstract]
Current maturities of long-term debt
Long-term Debt and Lease Obligation, Current
Notes payable
Short-term Debt
Accounts payable
Accounts Payable, Current
Current operating lease liabilities
Operating Lease, Liability, Current
Other current liabilities
Total current liabilities
Liabilities, Current
Long-term debt
Long-term Debt and Lease Obligation
Operating lease liabilities
Operating Lease, Liability, Noncurrent
Deferred income taxes
Deferred Tax Liabilities, Net, Noncurrent
Pension liability
Liability, Defined Benefit Pension Plan, Noncurrent
Other liabilities
Commitments and contingencies
Commitments and Contingencies
Equity
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Common stock, $.25 par value
Common Stock, Value, Issued
Capital in excess of par value
Additional Paid in Capital, Common Stock
Retained earnings
Retained Earnings (Accumulated Deficit)
Treasury stock, at cost
Treasury Stock, Value
Accumulated other comprehensive income (loss)
Accumulated Other Comprehensive Income (Loss), Net of Tax
Total Kellogg Company equity
Stockholders' Equity Attributable to Parent
Noncontrolling interests
Stockholders' Equity Attributable to Noncontrolling Interest
Total equity
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest
Total liabilities and equity
Liabilities and Equity
Supplemental Financial Data Consolidated Balance Sheet [Table Text Block]
Supplemental Financial Data Consolidated Balance Sheet [Table Text Block]
Supplemental Financial Data Consolidated Balance Sheet [Table Text Block]
Other Programs [Member]
Other Projects [Member]
Other restructuring projects [Member]
Restructuring and related costs, expected cost
Restructuring and Related Cost, Expected Cost
Cash costs
Effect on Future Cash Flows, Amount
Balance Sheet Location [Axis]
Balance Sheet Location [Axis]
Balance Sheet Location [Domain]
Balance Sheet Location [Domain]
Deferred tax liability
DeferredTaxLiability [Member]
DeferredTaxLiability [Member]
Other current liabilities
Other Current Liabilities [Member]
Effective income tax rate
Effective Income Tax Rate Reconciliation, Percent
Income tax benefit related to transition tax liability
Tax Cuts and Jobs Act, Change in Tax Rate, Deferred Tax Liability, Income Tax Benefit
Employer discretionary contribution amount
Defined Contribution Plan, Employer Discretionary Contribution Amount
Discrete tax benefit
Discrete Tax Benefit
Discrete tax benefit associated with remeasurement of deferred taxes following a legal entity restructuring as well as the reduction in the U.S. Corporate tax rate associated with the U.S. Tax Cuts and Jobs Act of 2017.
Income taxes paid
Income Taxes Paid
Unrecognized tax benefits
Unrecognized Tax Benefits
Projected additions to unrecognized tax benefits
Increase in Unrecognized Tax Benefits is Reasonably Possible
Unrecognized tax benefits that would affect the effective income tax rate
Unrecognized Tax Benefits that Would Impact Effective Tax Rate
Schedule of Multiemployer Plans [Table]
Schedule of Multiemployer Plans [Table]
Other liabilities
Other Noncurrent Liabilities [Member]
Multiemployer Plan Type [Axis]
Multiemployer Plan Type [Axis]
Multiemployer Plans Type [Domain]
Multiemployer Plans Type [Domain]
Multiemployer Plan Name [Axis]
Multiemployer Plan Name [Axis]
Multiemployer Plan Name [Domain]
Multiemployer Plan Name [Domain]
Collective Bargaining Arrangement [Axis]
Collective Bargaining Arrangement [Axis]
Collective Bargaining Arrangement [Domain]
Collective Bargaining Arrangement [Domain]
Multiemployer Plan, Plan Information [Axis]
Multiemployer Plan, Plan Information [Axis]
Multiemployer Plan, Plan Information [Domain]
Multiemployer Plan, Plan Information [Domain]
Multiemployer Plans [Line Items]
Multiemployer Plans [Line Items]
Pre tax charge multi-employer pension plan withdrawal
MultiemployerPensionPlanWithdrawalPreTaxCharge
Pre tax charge associated with Multiemployer pension plan withdrawal.
Annual cash obligation
Annual Cash Obligation
Annual cash payments associated with multi-employer pension plan withdrawal obligation.
Cash obligation period
CashObligationPeriod
The maximum number of years in which the Company is obligated to pay cash as a result of exiting multi-employer pension plans.
Reclassifications Out of AOCI
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]
Summary of Accumulated Other Comprehensive Income (Loss)
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
Schedule of Restructuring and Cost Reduction Activities
Restructuring and Related Costs [Table Text Block]
Schedule of Exit Cost Reserves
Schedule of Restructuring Reserve by Type of Cost [Table Text Block]
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Selling General and Administrative Expenses
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pre-tax compensation expense
Share-based Payment Arrangement, Expense
Related income tax benefit
Share-based Payment Arrangement, Expense, Tax Benefit
Project K [Member]
Project K [Member]
Employee related costs
Employee Severance [Member]
Pension curtailment (gain) loss, net
Benefit Plan Obligation Impact [Member]
Benefit Plan Obligation Impact [Member]
Asset impairment
Asset Impairment [Member]
Fixed Assets that are determined to be impaired and written down to their estimated fair value member
Asset related costs
Asset related costs [Member]
Asset related cost excluding asset impairment charges member
Other costs
Other Restructuring [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve [Roll Forward]
Liability, beginning balance
Cash payments
Payments for Restructuring
Non-cash charges and other
Restructuring Reserve, Accrual Adjustment
Liability, ending balance
Hedging Relationship [Axis]
Hedging Relationship [Axis]
Hedging Relationship [Domain]
Hedging Relationship [Domain]
Fair Value Hedges
Fair Value Hedging [Member]
Net Investment Hedging
Net Investment Hedging [Member]
Other current assets
Other Current Assets [Member]
Other assets
Other Assets [Member]
Other liabilities
Other Liabilities [Member]
Fair Value Hierarchy and NAV [Axis]
Fair Value Hierarchy and NAV [Axis]
Fair Value Hierarchy and NAV [Domain]
Fair Value Hierarchy and NAV [Domain]
Level 1
Fair Value, Inputs, Level 1 [Member]
Level 2
Fair Value, Inputs, Level 2 [Member]
Hedging Designation [Axis]
Hedging Designation [Axis]
Hedging Designation [Domain]
Hedging Designation [Domain]
Designated as Hedging Instrument
Designated as Hedging Instrument [Member]
Not Designated as Hedging Instrument
Not Designated as Hedging Instrument [Member]
Fair Value Of Related Hedge Portion Of Long Term Debt
Fair Value Of Related Hedge Portion Of Long Term Debt
The fair value of the portion of fixed rate long-term debt, the hedged item, which is hedged with fixed-to-floating, interest rate swaps.
Assets
Derivative Asset, Fair Value, Gross Asset
Liabilities
Derivative, Net Liability Position, Aggregate Fair Value
Long-term debt total, carrying value
Long-term Debt
Business Acquisition, Pro Forma Information [Table Text Block]
Business Acquisition, Pro Forma Information [Table Text Block]
Carrying Amount of Goodwill
Schedule of Goodwill [Table Text Block]
Intangible Assets Subject to Amortization
Schedule of Finite-Lived Intangible Assets [Table Text Block]
Intangible Assets Not Subject to Amortization
Schedule of Indefinite-Lived Intangible Assets [Table Text Block]
Operating Segments
Operating Segments [Member]
Corporate
Corporate, Non-Segment [Member]
Program costs to date
Restructuring and Related Cost, Cost Incurred to Date
Employee related costs
Other costs
Estimated after-tax cash costs for program, including incremental capital investments
Schedule of Indefinite-Lived Intangible Assets [Table]
Schedule of Indefinite-Lived Intangible Assets [Table]
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived Intangible Assets [Roll Forward]
Indefinite-lived Intangible Assets [Roll Forward]
Intangible assets not subject to amortization, beginning balance
Indefinite-lived Intangible Assets (Excluding Goodwill)
Additions
Divestiture
Purchase price allocation adjustment
Indefinite-lived Intangible Assets, Purchase Accounting Adjustments
Currency translation adjustment
Indefinite-lived Intangible Assets, Foreign Currency Translation Gain (Loss)
Intangible assets not subject to amortization, ending balance
Segment Reporting [Abstract]
Reportable Segments
Segment Reporting Disclosure [Text Block]
Cash Flow Hedging
Cash Flow Hedging [Member]
Foreign currency denominated long-term debt
Foreign Currency Denominated Long Term Debt [Member]
COGS
Interest expense
Interest Expense [Member]
Gain (loss) recognized in AOCI
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax
Gain (Loss) from Components Excluded from Assessment of Fair Value Hedge Effectiveness, Net
Gain (Loss) from Components Excluded from Assessment of Fair Value Hedge Effectiveness, Net
Gain (loss) reclassified from AOCI into income
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net
Gain (loss) recognized in income
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net
Retirement Plan Sponsor Location [Domain]
Retirement Plan Sponsor Location [Domain]
UNITED STATES
UNITED STATES
United States
Domestic Plan [Member]
Nonpension postretirement
Other Postretirement Benefits Plan [Member]
Employer contributions to employee benefit plans
Defined Benefit Plan, Plan Assets, Contributions by Employer
Total current year projected employer contributions
Defined Benefit Plan, Expected Future Employer Contributions, Current Fiscal Year
Lessee, Lease, Description [Table]
Lessee, Lease, Description [Table]
Product and Service [Axis]
Product and Service [Axis]
Product and Service [Domain]
Product and Service [Domain]
Lessee, Lease, Description [Line Items]
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Term of Contract
Lessee, Operating Lease, Term of Contract
Statement of Stockholders' Equity [Abstract]
Statement [Table]
Statement [Table]
Common stock
Common Stock [Member]
Capital in excess of par value
Additional Paid-in Capital [Member]
Treasury stock
Treasury Stock [Member]
Accumulated other comprehensive income (loss)
AOCI Attributable to Parent [Member]
Total Kellogg Company equity
Parent [Member]
Non-controlling interests
Noncontrolling Interest [Member]
Statement [Line Items]
Statement [Line Items]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance
Balance (in shares)
Shares, Issued
Common stock repurchases (in shares)
Treasury Stock, Shares, Acquired
Common stock repurchases
Treasury Stock, Value, Acquired, Cost Method
Net income
Acquisition of noncontrolling interest-Multipro
Noncontrolling Interest, Increase from Business Combination
Sale of subsidiary shares to noncontrolling interest
Noncontrolling Interest, Increase from Subsidiary Equity Issuance
Dividends declared
Dividends, Common Stock
Distributions to Noncontrolling interest
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders
Other comprehensive income (loss)
Other Comprehensive Income (Loss), Net of Tax
Stock compensation
APIC, Share-based Payment Arrangement, Increase for Cost Recognition
Stock options exercised and other (in shares)
Stock Issued During Period, Shares, Stock Options Exercised and Other
Number of share options (or share units) exercised during the current period. Number of shares of stock issued during the period that is attributable to transactions involving issuance of stock not separately disclosed.
Stock options exercised and other
Stock Issued During Period, Value, Stock Options Exercised and Other
Stock Issued During Period, Value, Stock Options Exercised and Other
Balance (in shares)
Balance
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest
Statement of Cash Flows [Abstract]
Operating activities
Net Cash Provided by (Used in) Operating Activities [Abstract]
Adjustments to reconcile net income to operating cash flows:
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Depreciation and amortization
Depreciation, Depletion and Amortization
Postretirement benefit plan expense (benefit)
Pension and Other Postretirement Benefits Cost (Reversal of Cost)
Deferred income taxes
Deferred Income Taxes and Tax Credits
Stock compensation
Share-based Payment Arrangement, Noncash Expense
Multi-employer pension plan exit liability
Gain on unconsolidated entities, net
Equity Method Investment, Realized Gain (Loss) on Disposal
Other
Other Noncash Income (Expense)
Postretirement benefit plan contributions
Payment for Pension and Other Postretirement Benefits
Changes in operating assets and liabilities, net of acquisitions:
Increase (Decrease) in Operating Capital [Abstract]
Trade receivables
Increase (Decrease) in Accounts Receivable
Inventories
Increase (Decrease) in Inventories
Accounts payable
Increase (Decrease) in Accounts Payable
All other current assets and liabilities
Increase (Decrease) in Other Operating Assets and Liabilities, Net
Net cash provided by (used in) operating activities
Net Cash Provided by (Used in) Operating Activities
Investing activities
Net Cash Provided by (Used in) Investing Activities [Abstract]
Additions to properties
Payments to Acquire Property, Plant, and Equipment
Acquisitions, net of cash acquired
Payments for (Proceeds from) Previous Acquisition
Divestitures
Proceeds from Divestiture of Businesses
Investments in unconsolidated entities
Payments to Acquire Interest in Joint Venture
Acquisition of cost method investments
Acquisition Of Cost Method Investment
The cash outflow associated with the investment in an entity accounted for under the cost method of accounting.
Purchases of available for sale securities
Payments to Acquire Debt Securities, Available-for-sale
Sales of available for sale securities
Proceeds from Sale of Debt Securities, Available-for-sale
Other
Payments for (Proceeds from) Other Investing Activities
Net cash provided by (used in) investing activities
Net Cash Provided by (Used in) Investing Activities
Financing activities
Net Cash Provided by (Used in) Financing Activities [Abstract]
Net issuances (reductions) of notes payable
Proceeds from (Repayments of) Notes Payable
Issuances of long-term debt
Proceeds from Issuance of Long-term Debt
Reductions of long-term debt
Repayments of Long-term Debt
Debt redemption costs
Payment for Debt Extinguishment or Debt Prepayment Cost
Net issuances of common stock
Proceeds from Issuance of Common Stock
Common stock repurchases
Payments for Repurchase of Common Stock
Cash dividends
Payments of Ordinary Dividends, Common Stock
Other
Proceeds from (Payments for) Other Financing Activities
Net cash provided by (used in) financing activities
Net Cash Provided by (Used in) Financing Activities
Effect of exchange rate changes on cash and cash equivalents
Effect of Exchange Rate on Cash and Cash Equivalents
Increase (decrease) in cash and cash equivalents
Cash and Cash Equivalents, Period Increase (Decrease)
Cash and cash equivalents at beginning of period
Cash and cash equivalents at end of period
Supplemental cash flow disclosures
Supplemental Cash Flow Information [Abstract]
Interest paid
Interest Paid, Excluding Capitalized Interest, Operating Activities
Supplemental cash flow disclosures of non-cash investing activities
Noncash Investing and Financing Items [Abstract]
Additions to properties included in accounts payable
Capital Expenditures Incurred but Not yet Paid
Derivative Instruments and Fair Value Measurements
Derivatives and Fair Value [Text Block]
Income Statement [Abstract]
Net sales
Revenues
Cost of goods sold
Selling, general and administrative expense
Operating profit
Operating Income (Loss)
Interest expense
Other income (expense), net
Income before income taxes
Income taxes
Earnings (loss) from unconsolidated entities
Income (Loss) from Equity Method Investments
Net income attributable to noncontrolling interests
Net Income (Loss) Attributable to Noncontrolling Interest
Net income attributable to Kellogg Company
Net Income (Loss) Attributable to Parent
Per share amounts:
Earnings Per Share [Abstract]
Basic earnings (in dollars per share)
Earnings Per Share, Basic
Diluted earnings (in dollars per share)
Earnings Per Share, Diluted
Average shares outstanding:
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Basic (in shares)
Weighted Average Number of Shares Outstanding, Basic
Diluted (in shares)
Weighted Average Number of Shares Outstanding, Diluted
Actual shares outstanding at period end (in shares)
Common Stock, Shares, Outstanding
Cover page.
Entities [Table]
Entities [Table]
Class of Stock [Axis]
Class of Stock [Axis]
Class of Stock [Domain]
Class of Stock [Domain]
1.750% Senior Notes Due 2021 [Member]
1.750% Senior Notes Due 2021 [Member]
1.750% Senior Notes Due 2021 [Member]
0.800% Senior Notes Due 2022 [Member]
0.800% Senior Notes Due 2022 [Member]
0.800% Senior Notes Due 2022 [Member]
1.000% Senior Notes Due 2024 [Member]
1.000% Senior Notes Due 2024 [Member]
1.000% Senior Notes Due 2024 [Member]
1.250% Senior Notes Due 2025 [Member]
1.250% Senior Notes Due 2025 [Member]
1.250% Senior Notes Due 2025 [Member]
Entity Information [Line Items]
Entity Information [Line Items]
Document Type
Document Type
Document Quarterly Report
Document Quarterly Report
Entity Registrant Name
Entity Registrant Name
Document Period End Date
Document Period End Date
Document Transition Report
Document Transition Report
Entity File Number
Entity File Number
Entity Incorporation, State or Country Code
Entity Incorporation, State or Country Code
Entity Tax Identification Number
Entity Tax Identification Number
Entity Address, Address Line One
Entity Address, Address Line One
Entity Address, Address Line Two
Entity Address, Address Line Two
Entity Address, City or Town
Entity Address, City or Town
Entity Address, State or Province
Entity Address, State or Province
Entity Address, Postal Zip Code
Entity Address, Postal Zip Code
City Area Code
City Area Code
Local Phone Number
Local Phone Number
Entity Current Reporting Status
Entity Current Reporting Status
Entity Interactive Data Current
Entity Interactive Data Current
Entity Filer Category
Entity Filer Category
Entity Small Business
Entity Small Business
Entity Emerging Growth Company
Entity Emerging Growth Company
Entity Shell Company
Entity Shell Company
Title of 12(b) Security
Title of 12(b) Security
Trading Symbol
Trading Symbol
Security Exchange Name
Security Exchange Name
Entity Common Stock, Shares Outstanding (in shares)
Entity Common Stock, Shares Outstanding
Amendment Flag
Amendment Flag
Document Fiscal Period Focus
Document Fiscal Period Focus
Document Fiscal Year Focus
Document Fiscal Year Focus
Entity Central Index Key
Entity Central Index Key
Current Fiscal Year End Date
Current Fiscal Year End Date
Debt Securities, Available-for-sale [Table]
Debt Securities, Available-for-sale [Table]
Level 2
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale securities, cost
Available-for-sale Securities, Amortized Cost Basis
Available-for-sale securities, unrealized gain (loss)
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax
Available-for-sale securities, market value
Debt Securities, Available-for-sale
Gain on sale of available-for-sale securities
Debt Securities, Available-for-sale, Gain (Loss)
Accounting Policies
Significant Accounting Policies [Text Block]
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Hedge Adjustment [Axis]
Hedge Adjustment [Axis]
Hedge Adjustment [Axis]
Hedge Adjustment [Domain]
Hedge Adjustment [Domain]
[Domain] for Hedge Adjustment [Axis]
Carrying amount of hedged liability
Carrying Amount Of Hedged Liability [Member]
Carrying amount of hedged liability
Cumulative fair value adjustment
Cumulative Fair Value Adjustment [Member]
Cumulative fair value adjustment
Hedging adjustment
Hedging Adjustment [Member]
Hedging adjustment
Discontinued Hedges
Discontinued Hedging [Member]
Discontinued Hedges
Position [Axis]
Position [Axis]
Position [Domain]
Position [Domain]
Current maturities of long-term debt
Discontinued Operations and Disposal Groups [Abstract]
Disposal Groups, Including Discontinued Operations [Table]
Disposal Groups, Including Discontinued Operations [Table]
U.S. pension and nonpension postretirement plans
Other Pension, Postretirement and Supplemental Plans [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash proceeds from sale of businesses
Net assets
Net Assets
Gain (Loss) on Disposition of Business
Gain (Loss) on Disposition of Business
Disposition related transaction costs
DispositionOfBusinessTransactionRelatedCosts
Disposition of business transaction related costs.
Curtailment gain
Derivative [Table]
Derivative [Table]
Customer [Axis]
Customer [Axis]
Customer [Domain]
Customer [Domain]
Five Largest Accounts
Five Largest Accounts [Member]
Five Largest Accounts [Member]
Concentration Risk Type [Axis]
Concentration Risk Type [Axis]
Concentration Risk Type [Domain]
Concentration Risk Type [Domain]
Customer Concentration Risk
Customer Concentration Risk [Member]
Concentration Risk Benchmark [Axis]
Concentration Risk Benchmark [Axis]
Concentration Risk Benchmark [Domain]
Concentration Risk Benchmark [Domain]
Trade receivables
Accounts Receivable [Member]
Accounts Receivable, Net
Exchange-traded commodity
Derivative [Line Items]
Derivative [Line Items]
Net deferred losses reported in AOCI to be reclassified into income in the next twelve months
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months
Fair value of derivative instruments with credit-risk-related contingent features in a liability position
Credit Risk Derivative Liabilities, at Fair Value
Additional collateral required to be posted if the credit risk related contingent features were triggered
Additional Collateral, Aggregate Fair Value
Concentration of risk, derivative instruments assets
Fair Value, Concentration of Risk, Derivative Instruments, Assets
Collateral posted
Collateral Already Posted, Aggregate Fair Value
Derivative, Collateral, Obligation to Return Cash
Derivative, Collateral, Obligation to Return Cash
Margin deposits
Margin Deposit Assets
Concentration percentage
Concentration Risk, Percentage
Income Taxes
Income Tax Disclosure [Text Block]
Dividends declared
Common Stock, Dividends, Per Share, Declared
Revenue
Revenue Benchmark [Member]
Other (income) expense, net
Restructuring and related costs since inception of program
Equity
Stockholders' Equity Note Disclosure [Text Block]
Debt
Debt Disclosure [Text Block]
Offsetting [Abstract]
Asset derivatives, Amounts Presented in the Consolidated Balance Sheet
Derivative Asset
Asset derivatives, Financial Instruments, Gross Amounts Not Offset in the Consolidated Balance Sheet
Derivative Asset, Not Offset, Policy Election Deduction
Asset derivatives, Cash Collateral Posted, Gross Amounts Not Offset in the Consolidated Balance Sheet
Asset derivatives, Net Amount
Derivative Asset, Fair Value, Offset Against Collateral, Net of Not Subject to Master Netting Arrangement, Policy Election
Liability derivatives, Amounts Presented in the Consolidated Balance Sheet
Derivative Liability
Liability derivatives, Financial Instruments, Gross Amounts Not Offset in the Consolidated Balance Sheet
Derivative Liability, Not Offset, Policy Election Deduction
Liability derivatives, Cash Collateral Received, Gross Amounts Not Offset in the Consolidated Balance Sheet
Derivative, Collateral, Right to Reclaim Cash
Liability derivatives, net amount
Derivative Liability, Fair Value, Offset Against Collateral, Net of Not Subject to Master Netting Arrangement, Policy Election
Restructuring and related activities cash implementation costs recovery time frame
Restructuring And Related Activities Cash Implementation Costs Recovery Timeframe
Time frame expected to recover cash implementation costs associated with restructuring and related activities after completion of the program.
Stock Compensation
Share-based Payment Arrangement [Text Block]
Schedule of Short-term Debt [Table]
Schedule of Short-term Debt [Table]
Short-term Debt, Type [Axis]
Short-term Debt, Type [Axis]
Short-term Debt, Type [Domain]
Short-term Debt, Type [Domain]
U.S. commercial paper
Commercial Paper [Member]
Bank borrowings
Notes Payable to Banks [Member]
Short-term Debt [Line Items]
Short-term Debt [Line Items]
Principal amount
Effective interest rate
Debt Instrument, Interest Rate, Effective Percentage
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance
Additions, current year
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions
Reductions, current year
Unrecognized Tax Benefits, Decrease Resulting from Current Period Tax Positions
Additions, prior years
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions
Reductions, prior years
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions
Settlements
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations
Ending balance
Change in carrying amount of goodwill
Goodwill [Roll Forward]
Beginning Balance
Additions
Goodwill, Acquired During Period
Purchase price allocation adjustment
Goodwill, Transfers
Purchase price adjustment
Goodwill, Purchase Accounting Adjustments
Divestiture
Currency translation adjustment
Goodwill, Foreign Currency Translation Gain (Loss)
Ending Balance
Operating lease costs
Operating Lease, Cost
Schedule of Reportable Segment Information
Schedule of Segment Reporting Information, by Segment [Table Text Block]
Revenue from External Customers by Products and Services
Revenue from External Customers by Products and Services [Table Text Block]
Long-term debt, fair value
Long-term Debt, Fair Value
Schedule of Segment Reporting Information, by Segment [Table]
Schedule of Segment Reporting Information, by Segment [Table]
Segment Reporting Information [Line Items]
Segment Reporting Information [Line Items]
Number of operating segments
Number of Operating Segments
Operating profit
Research and development expense
Research and Development Expense
Indirect excise tax liability reversal
ExciseTaxLiabilityReversal
Income effect of a reversal of an indirect excise tax liability associated with participation in a tax amnesty program.
Acquisitions, West Africa Investments, Goodwill and Other Intangible Assets
Acquisitions, Goodwill and Other Intangibles [Text Block]
The entire disclosure for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities.The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss.
Disposal Groups, Including Discontinued Operations, Disclosure [Text Block]
Disposal Groups, Including Discontinued Operations, Disclosure [Text Block]
Restricted Stock Award, Forfeitures [Abstract]
Award Type [Axis]
Award Type [Axis]
Award Type [Domain]
Award Type [Domain]
Restricted stock units
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Granted (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Non-vested, beginning of year, weighted-average grant-date fair value (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value
Granted, weighted-average grant-date fair value (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value
Non-vested, end of year, weighted-average grant-date fair value (in dollars per share)
Class of Treasury Stock [Table]
Class of Treasury Stock [Table]
Share Repurchase Program [Axis]
Share Repurchase Program [Axis]
Share Repurchase Program [Domain]
Share Repurchase Program [Domain]
December 2017 Share Repurchase Program
December Two Thousand Seventeen Share Repurchase Program [Member]
December 2017 Share Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Equity, Class of Treasury Stock [Line Items]
Anti-dilutive potential common shares excluded from reconciliation
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount
Stock repurchase program, authorized amount
Stock Repurchase Program, Authorized Amount
Stock Repurchase Program, Remaining Authorized Repurchase Amount
Stock Repurchase Program, Remaining Authorized Repurchase Amount
Common stock repurchased (in shares)
Common stock repurchased
Operating Lease, Payments
Operating Lease, Payments
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability
Operating Lease, Weighted Average Remaining Lease Term
Operating Lease, Weighted Average Remaining Lease Term
Operating Lease, Weighted Average Discount Rate, Percent
Operating Lease, Weighted Average Discount Rate, Percent
2019 Award
PerformanceSharesTargetGrantTwentyNineteen [Member]
Performance shares target grant 2019.
2016 Award
PerformanceSharesTargetGrantTwentySixteen [Member]
Performance Shares Target Grant Twenty Sixteen [Member]
Percentage of performance shares that may be earned upon performance
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage
Award vesting period
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period
Performance shares target grant distribution (in shares)
Performance Share Target Grant
Performance Share Target Grant
Grant-date fair value of shares that correspond with target grants
Performance share award settlement
Performance Awards Settlement Stock Issued Value
Performance Awards Settlement Stock Issued Value
Europe
Foreign Plan [Member]
Expected return on plan assets
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets
Recognized net (gain) loss
Hedged items
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge
Derivatives designated as hedging instruments
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments
Gain (loss) reclassified from AOCI into income
Minimum lease payments for real-estate leases signed but not yet commenced
Unrecorded Unconditional Purchase Obligation
Operating lease rent expense
Operating Lease, Expense
Common stock, par value (in dollars per share)
Common Stock, Par or Stated Value Per Share
Snacks
Retail Channel Snacks [Member]
Retail Channel Snacks [Member]
Cereal
Retail Channel Cereal [Member]
Retail Channel Cereal [Member]
Frozen
Frozen And Specialty Channels [Member]
Frozen And Specialty Channels [Member]
Noodles and other
NoodlesandOther [Member]
Noodles and other.
Restructuring and related cost, expected cost allocation
Restructuring And Related Cost Expected Cost Allocation
Allocation amount expected to be recognized in earnings for the specified restructuring cost.
Loss Contingency [Abstract]
Contingencies
Commitments and Contingencies Disclosure [Text Block]
Employee Benefits
Pension and Other Postretirement Benefits Disclosure [Text Block]
Acquisitions, West Africa Investments, Goodwill and Other Intangibles Narrative [Abstract]
Narrative [Abstract]
Schedule of Business Acquisitions, by Acquisition [Table]
Schedule of Business Acquisitions, by Acquisition [Table]
Tolaram Africa Foods (TAF) PTE LTD
Tolaram Africa Foods Pte Ltd [Member]
Tolaram Africa Foods PTE LTD
TAF Investment in Affiliated Food Manufacturer
TAF Investment in Affiliated Food Manufacturer [Member]
Tolaram Africa Foods (TAF) Investment in Affiliated Food Manufacturer.
Affiliated Food Manufacturer
Affiliated Food Manufacturer [Member]
Affiliated Food Manufacturer [Member]
Multipro
Multipro [Member]
Multipro [Member]
Business Acquisition [Line Items]
Business Acquisition [Line Items]
Equity method investment incremental ownership percentage change
Equity Method Investment Incremental Ownership Percentage
Increase in the percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.
Business Acquisition, Pro Forma Revenue
Business Acquisition, Pro Forma Revenue
Business Acquisition, Pro Forma Net Income (Loss)
Business Acquisition, Pro Forma Net Income (Loss)
Equity method investment, ownership percentage
Equity Method Investment, Ownership Percentage
Payments to acquire business, gross
Payments to Acquire Businesses, Gross
Purchase price adjustment
Equity Method Investment, Realized Gain (Loss) on Disposal
Equity method investment aggregate cost
Equity Method Investment, Aggregate Cost
Equity Method Investment, Other than Temporary Impairment
Equity Method Investment, Other than Temporary Impairment
Net income attributable to Kellogg Company
Schedule of Total Notional Amounts of Derivative Instruments
Derivative Instruments and Hedging Activities Disclosure [Text Block]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
Schedule of Derivative Instruments in Statement of Financial Position Fair Value
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]
Schedule of Offsetting Assets
Offsetting Assets [Table Text Block]
Schedule of Offsetting Liabilities
Offsetting Liabilities [Table Text Block]
Schedule of the Effect of Derivative Instruments on the Consolidated Statements of Income and Comprehensive Income
Derivative Instruments, Gain (Loss) [Table Text Block]
Available-for-sale securities
Available-for-sale Securities [Table Text Block]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax
Cash flow hedges — unrealized net gain (loss)
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax
Postretirement and postemployment benefits:
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax [Abstract]
Net experience gain (loss)
Accumulated Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), after Tax
Prior service credit (cost)
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), after Tax
Available-for-sale securities unrealized net gain (loss)
AOCI, Debt Securities, Available-for-sale, Adjustment, after Tax
Total accumulated other comprehensive income (loss)
Operating leases, future minimum payments due 2019
Operating Leases, Future Minimum Payments Due, Next Twelve Months
Operating leases, future minimum payments due 2020
Operating Leases, Future Minimum Payments, Due in Two Years
Operating leases, future minimum payments due 2021
Operating Leases, Future Minimum Payments, Due in Three Years
Operating leases, future minimum payments due 2022
Operating Leases, Future Minimum Payments, Due in Four Years
Operating leases, future minimum payments due 2023
Operating Leases, Future Minimum Payments, Due in Five Years
Operating leases, future minimum payments due 2024 and beyond
Operating Leases, Future Minimum Payments, Due Thereafter
Operating leases, total minimum payments
Operating Leases, Future Minimum Payments Due
Transfers and Servicing of Financial Assets [Text Block]
Transfers and Servicing of Financial Assets [Text Block]
Statement of Comprehensive Income [Abstract]
Other comprehensive income (loss), pre-tax:
Other Comprehensive Income (Loss), before Tax [Abstract]
Foreign currency translation adjustments, pre-tax
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss), before Reclassification and Tax
Cash flow hedges, pre-tax:
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax [Abstract]
Unrealized gain (loss) on cash flow hedges, pre-tax
Reclassification to net income, pre-tax
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax
Postretirement and postemployment benefit amounts arising during the period, pre-tax:
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment and Tax [Abstract]
Prior service credit (cost), pre-tax
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), before Tax
Postretirement and postemployment benefits reclassification to net income, pre-tax:
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax [Abstract]
Net experience (gain) loss
Available-for-sale securities, pre-tax
Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, before Tax [Abstract]
Unrealized gain (loss) on available-for-sale securities, pre-tax
Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, before Tax
Reclassification to net income on available-for-sale securities, pre-tax
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax
Other comprehensive income (loss), pre-tax
Other Comprehensive Income (Loss), before Tax
Other comprehensive income (loss), tax (expense) benefit
Other Comprehensive Income (Loss), Tax [Abstract]
Foreign currency translation adjustments, tax (expense) benefit
Other Comprehensive Income (Loss), Foreign Currency Translation Gain (Loss) Arising During Period, Tax
Cash flow hedges, tax (expense) benefit:
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax [Abstract]
Unrealized gain (loss) on cash flow hedges, tax (expense) benefit
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax
Reclassification to net income, tax (expense) benefit
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax
Postretirement and postemployment benefit amounts arising during the period, tax (expense) benefit:
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, Tax [Abstract]
Prior service credit (cost), tax (expense) benefit
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Plan Amendments, Tax Effect
Postretirement and postemployment benefits reclassification to net income, tax (expense) benefit:
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, Tax [Abstract]
Net experience loss, tax (expense) benefit
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, Tax
Prior service cost, tax (expense) benefit
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, Tax
Available-for-sale securities, tax (expense) benefit
Other Comprehensive Income (Loss), Securities, Available-for-sale, Tax [Abstract]
Unrealized gain (loss) on available-for-sale securities, tax (expense) benefit
Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, Tax
Reclassification to net income on available for sale of securities, tax (expense) benefit
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax
Other comprehensive income (loss), tax (expense) benefit
Other Comprehensive Income (Loss), Tax
Other comprehensive income (loss), after tax:
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Foreign currency translation adjustments, after-tax
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax
Cash flow hedges, after tax
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax [Abstract]
Unrealized gain (loss) on cash flow hedges, after-tax
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax
Reclassification to net income, after-tax
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax
Postretirement and postemployment benefit amounts arising during the period, after-tax:
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax [Abstract]
Prior service credit (cost), after-tax
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), after Tax
Postretirement and postemployment benefits reclassification to net income, after-tax:
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, after Tax [Abstract]
Net experience (gain) loss, after-tax
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax
Prior service cost, after-tax
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, after Tax
Available-for-sale securities, after tax
Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, after Tax [Abstract]
Unrealized gain (loss) on available-for-sale securities, after-tax
Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, after Tax
Reclassification to net income on available for sale securities, after tax
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax
Other comprehensive income (loss)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent
Comprehensive income
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest
Other comprehensive income (loss) attributable to noncontrolling interests
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest
Comprehensive income attributable to Kellogg Company
Comprehensive Income (Loss), Net of Tax, Attributable to Parent
Equity Method Investments and Joint Ventures [Abstract]
Equity Method Investments and Joint Ventures Disclosure [Text Block]
Equity Method Investments and Joint Ventures Disclosure [Text Block]