Document Information [Line Items] Document Information [Line Items] NASDAQ - ALL MARKETS [Member] NASDAQ - ALL MARKETS [Member] Common Stock [Member] Common Stock [Member] Cover page. Cover page. Series A Floating-Rate Non-Cumulative Perpetual Preferred Stock [Member] Series A Floating-Rate Non-Cumulative Perpetual Preferred Stock [Member] Series A Floating-Rate Non-Cumulative Perpetual Preferred Stock Amendment Description Amendment Description Security Exchange Name Security Exchange Name Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Entity Registrant Name Entity Registrant Name Series G Fixed/Floating-Rate Non-Cumulative Perpetual Preferred Stock [Member] Series G Fixed/Floating-Rate Non-Cumulative Perpetual Preferred Stock [Member] Series G Fixed/Floating-Rate Non-Cumulative Perpetual Preferred Stock Pre-commencement Issuer Tender Offer Pre-commencement Issuer Tender Offer Entity Address, Address Line One Entity Address, Address Line One Local Phone Number Local Phone Number Fixed-to-Floating 6.95% Rate Subordinated Notes Due September 14, 2028 [Member] Fixed-to-Floating 6.95% Rate Subordinated Notes Due September 14, 2028 [Member] Fixed-to-Floating 6.95% Rate Subordinated Notes Due September 14, 2028 Written Communications Written Communications Series H 5.75% Non-Cumulative Perpetual Preferred Stock [Member] Series H 5.75% Non-Cumulative Perpetual Preferred Stock [Member] Series H 5.75% Non-Cumulative Perpetual Preferred Stock Soliciting Material Soliciting Material Trading Symbol Trading Symbol Entity Address, State or Province Entity Address, State or Province Pre-commencement Tender Offer Pre-commencement Tender Offer Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Type Document Type City Area Code City Area Code Class of Stock [Domain] Class of Stock [Domain] Entity Emerging Growth Company Entity Emerging Growth Company Entity File Number Entity File Number Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Tax Identification Number Entity Tax Identification Number Entity Address, City or Town Entity Address, City or Town Entity Central Index Key Entity Central Index Key Entity Listings, Exchange [Axis] Entity Listings, Exchange [Axis] Exchange [Domain] Exchange [Domain] NEW YORK STOCK EXCHANGE, INC. [Member] NEW YORK STOCK EXCHANGE, INC. [Member] Document Information [Table] Document Information [Table] Warrant [Member] Warrant [Member] Title of 12(b) Security Title of 12(b) Security Class of Stock [Axis] Class of Stock [Axis]