Class of Stock [Domain] Class of Stock [Domain] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Depositary Shares (each representing 1/100th interest in a share of Series A Non-Cumulative Perpetual Preferred Stock, par value $1.00) Series A Preferred Stock [Member] Class of Stock [Axis] Class of Stock [Axis] Security Exchange Name Security Exchange Name Entity Address, City or Town Entity Address, City or Town Soliciting Material Soliciting Material Cover [Abstract] Depositary Shares (each representing 1/1,000th interest in a share of Series L Non-Cumulative Perpetual Preferred Stock, par value $1.00) Series L Preferred Stock [Member] Series L Preferred Stock [Member] Floating Rate Notes, Series CC (Senior), due May 21, 2028 Series CC (Senior), Floating [Member] Series CC (Senior), Floating Debt Instrument [Axis] Debt Instrument [Axis] City Area Code City Area Code Common Stock, $.01 par value per share Common Stock [Member] Amendment Flag Amendment Flag Entity Tax Identification Number Entity Tax Identification Number Trading Symbol Trading Symbol Entity Registrant Name Entity Registrant Name Pre-commencement Tender Offer Pre-commencement Tender Offer Depositary Shares (each representing 1/1,000th interest in a share of Series O Non-Cumulative Perpetual Preferred Stock, par value $1.00) Series O Preferred Stock [Member] Series O Preferred Stock [Member] Entity Emerging Growth Company Entity Emerging Growth Company Entity Central Index Key Entity Central Index Key Entity File Number Entity File Number Entity Address, State or Province Entity Address, State or Province Entity Listings [Table] Entity Listings [Table] Pre-commencement Issuer Tender Offer Pre-commencement Issuer Tender Offer Depositary Shares (each representing 1/1,000th interest in a share of Series B Non-Cumulative Perpetual Preferred Stock, par value $1.00) Series B Preferred Stock [Member] Entity Address, Address Line One Entity Address, Address Line One Entity Address, Postal Zip Code Entity Address, Postal Zip Code Written Communications Written Communications Depositary Shares (each representing 1/1,000th interest in a share of Series M Non-Cumulative Perpetual Preferred Stock, par value $1.00) Series M Preferred Stock [Member] Series M Preferred Stock [Member]. Local Phone Number Local Phone Number Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Title of 12(b) Security Title of 12(b) Security Document Period End Date Document Period End Date Entity Listings [Line Items] Entity Listings [Line Items] Depositary Shares (each representing 1/1,000th interest in a share of Series K Non-Cumulative Perpetual Preferred Stock, par value $1.00) Series K Preferred Stock [Member] Series K Preferred Stock [Member] Document Type Document Type 4.009% Fixed-to-Floating Rate Notes, Series CC (Senior), due May 21, 2032 Series CC (Senior), Fixed-To-Floating [Member] Series CC (Senior), Fixed-to-Floating