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Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) link:presentationLink link:calculationLink link:definitionLink 2101101 - Disclosure - Basis of Presentation link:presentationLink link:calculationLink link:definitionLink 2202201 - Disclosure - Basis of Presentation (Policies) link:presentationLink link:calculationLink link:definitionLink 2103102 - Disclosure - Accounting Developments link:presentationLink link:calculationLink link:definitionLink 2204202 - Disclosure - Accounting Developments (Policies) link:presentationLink link:calculationLink link:definitionLink 2305301 - Disclosure - Accounting Developments (Tables) link:presentationLink link:calculationLink link:definitionLink 2406401 - Disclosure - Accounting Developments (Details) link:presentationLink link:calculationLink link:definitionLink 2407402 - Disclosure - Accounting Policies (Details) link:presentationLink link:calculationLink link:definitionLink 2108103 - Disclosure - Fair Values of Financial Instruments link:presentationLink link:calculationLink link:definitionLink 2309302 - 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Disclosure - Debt Securities, Available-for-sale, Allowance for Credit Losses Rollforward (Details) link:presentationLink link:calculationLink link:definitionLink 2423414 - Disclosure - Investments Low Income Housing Tax Credits (Details) link:presentationLink link:calculationLink link:definitionLink 2424415 - Disclosure - Mortgage Loans by Property Type and Geographic Region (Detail) link:presentationLink link:calculationLink link:definitionLink 2425416 - Disclosure - Schedule of Participating Mortgage Loans by Internal Credit Rating and Loan to Value (Details) link:presentationLink link:calculationLink link:definitionLink 2426417 - Disclosure - Mortgage Loans, Sorted by Applicable Credit Quality Indicators (Detail) link:presentationLink link:calculationLink link:definitionLink 2427418 - Disclosure - Mortgage Loans, Allowance for Credit Losses Rollforward (Details) link:presentationLink link:calculationLink link:definitionLink 2428419 - Disclosure - Investments Federal Home Loan Bank Carrying Amount, Collateral Posted and Advances Received (Details) link:presentationLink link:calculationLink link:definitionLink 2429420 - Disclosure - Investments Schedule of Financial Instrument and Derivative Offsetting (Details) link:presentationLink link:calculationLink link:definitionLink 2430421 - Disclosure - Investments Investment Income (Detail) link:presentationLink link:calculationLink link:definitionLink 2431422 - Disclosure - Realized Investment Gains and Losses Reported in Consolidated Statements of Income (Detail) link:presentationLink link:calculationLink link:definitionLink 2432423 - Disclosure - Investments - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 2133105 - Disclosure - Derivative Financial Instruments link:presentationLink link:calculationLink link:definitionLink 2334304 - Disclosure - Derivative Financial Instruments (Tables) link:presentationLink link:calculationLink link:definitionLink 2435424 - Disclosure - Derivative Financial Instruments Nature and Amount of Collateral Received From and Posted To Our Derivative Counterparties (Details) link:presentationLink link:calculationLink link:definitionLink 2436425 - 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