v3.26.1
Fair Value Measurements (Schedule Of Assets And Liabilities At Fair Value Measured On A Recurring Basis) (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Mar. 31, 2026
Dec. 31, 2025
Jun. 30, 2025
Mar. 31, 2025
Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Debt securities available for sale $ 27,388   $ 27,560      
Servicing Asset at Fair Value, Amount 958   970      
Derivative Asset, Estimated Fair Value 1,476   1,335      
Derivative Liability, Estimated Fair Value 1,857   1,445      
Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Debt securities available for sale 27,388   27,560      
Loans held for sale 300   290      
Marketable Equity Securities carried at fair value 759   946      
Derivative Asset, Estimated Fair Value 1,476   1,335      
Derivative Liability, Estimated Fair Value 1,857   1,445      
Security Sold Short, Fair Value 129   19      
Level 1 [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Loans held for sale 0   0      
Level 1 [Member] | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Debt securities available for sale 2,039   2,276      
Loans held for sale 0   0      
Marketable Equity Securities carried at fair value 759   946      
Derivative Asset, Estimated Fair Value 5   1      
Derivative Liability, Estimated Fair Value 2   0      
Security Sold Short, Fair Value 129   19      
Level 2 [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Loans held for sale 287   221      
Level 2 [Member] | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Debt securities available for sale 25,347   25,282      
Loans held for sale 299   290      
Marketable Equity Securities carried at fair value 0   0      
Derivative Asset, Estimated Fair Value 1,465   1,328      
Derivative Liability, Estimated Fair Value 1,855   1,445      
Security Sold Short, Fair Value 0   0      
Level 3 [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Loans held for sale 4   0      
Level 3 [Member] | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Debt securities available for sale 2   2      
Loans held for sale 1   0      
Marketable Equity Securities carried at fair value 0   0      
Derivative Asset, Estimated Fair Value 6   6      
Derivative Liability, Estimated Fair Value 0   0      
Security Sold Short, Fair Value 0   0      
Interest rate swaps | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Derivative Asset, Estimated Fair Value 1,160   1,126      
Derivative Liability, Estimated Fair Value 1,574   1,265      
Interest rate swaps | Level 1 [Member] | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Derivative Asset, Estimated Fair Value 0   0      
Derivative Liability, Estimated Fair Value 0   0      
Interest rate swaps | Level 2 [Member] | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Derivative Asset, Estimated Fair Value 1,160   1,126      
Derivative Liability, Estimated Fair Value 1,574   1,265      
Interest rate swaps | Level 3 [Member] | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Derivative Asset, Estimated Fair Value 0   0      
Derivative Liability, Estimated Fair Value 0   0      
Interest rate options | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Derivative Asset, Estimated Fair Value 32   16      
Derivative Liability, Estimated Fair Value 25   7      
Interest rate options | Level 1 [Member] | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Derivative Asset, Estimated Fair Value 0   0      
Derivative Liability, Estimated Fair Value 0   0      
Interest rate options | Level 2 [Member] | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Derivative Asset, Estimated Fair Value 26   10      
Derivative Liability, Estimated Fair Value 25   7      
Interest rate options | Level 3 [Member] | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Derivative Asset, Estimated Fair Value 6   6      
Derivative Liability, Estimated Fair Value 0   0      
Interest rate futures and forward commitments | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Derivative Asset, Estimated Fair Value 8   8      
Derivative Liability, Estimated Fair Value 1   1      
Interest rate futures and forward commitments | Level 1 [Member] | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Derivative Asset, Estimated Fair Value 0   0      
Derivative Liability, Estimated Fair Value 0   0      
Interest rate futures and forward commitments | Level 2 [Member] | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Derivative Asset, Estimated Fair Value 8   8      
Derivative Liability, Estimated Fair Value 1   1      
Interest rate futures and forward commitments | Level 3 [Member] | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Derivative Asset, Estimated Fair Value 0   0      
Derivative Liability, Estimated Fair Value 0   0      
Other Contracts [Member] | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Derivative Asset, Estimated Fair Value 276   185      
Derivative Liability, Estimated Fair Value 257   172      
Other Contracts [Member] | Level 1 [Member] | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Derivative Asset, Estimated Fair Value 5   1      
Derivative Liability, Estimated Fair Value 2   0      
Other Contracts [Member] | Level 2 [Member] | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Derivative Asset, Estimated Fair Value 271   184      
Derivative Liability, Estimated Fair Value 255   172      
Other Contracts [Member] | Level 3 [Member] | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Derivative Asset, Estimated Fair Value 0   0      
Derivative Liability, Estimated Fair Value 0   0      
U.S. Treasury securities            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Debt securities available for sale 2,039   2,276      
U.S. Treasury securities | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Debt securities available for sale 2,039   2,276      
U.S. Treasury securities | Level 1 [Member] | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Debt securities available for sale 2,039   2,276      
U.S. Treasury securities | Level 2 [Member] | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Debt securities available for sale 0   0      
U.S. Treasury securities | Level 3 [Member] | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Debt securities available for sale 0   0      
Federal agency securities            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Debt securities available for sale 532   543      
Federal agency securities | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Debt securities available for sale 532   543      
Federal agency securities | Level 1 [Member] | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Debt securities available for sale 0   0      
Federal agency securities | Level 2 [Member] | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Debt securities available for sale 532   543      
Federal agency securities | Level 3 [Member] | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Debt securities available for sale 0   0      
Obligations of states and political subdivisions            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Debt securities available for sale 2   2      
Obligations of states and political subdivisions | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Debt securities available for sale 2   2      
Obligations of states and political subdivisions | Level 1 [Member] | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Debt securities available for sale 0   0      
Obligations of states and political subdivisions | Level 2 [Member] | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Debt securities available for sale 2   2      
Obligations of states and political subdivisions | Level 3 [Member] | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Debt securities available for sale 0   0      
Residential agency            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Debt securities available for sale 17,694   18,387      
Residential agency | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Debt securities available for sale 17,694   18,387      
Residential agency | Level 1 [Member] | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Debt securities available for sale 0   0      
Residential agency | Level 2 [Member] | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Debt securities available for sale 17,694   18,387      
Residential agency | Level 3 [Member] | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Debt securities available for sale 0   0      
Commercial agency            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Debt securities available for sale 6,534   5,829      
Commercial agency | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Debt securities available for sale 6,534   5,829      
Commercial agency | Level 1 [Member] | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Debt securities available for sale 0   0      
Commercial agency | Level 2 [Member] | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Debt securities available for sale 6,534   5,829      
Commercial agency | Level 3 [Member] | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Debt securities available for sale 0   0      
Commercial non-agency            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Debt securities available for sale 157   82      
Commercial non-agency | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Debt securities available for sale 157   82      
Commercial non-agency | Level 1 [Member] | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Debt securities available for sale 0   0      
Commercial non-agency | Level 2 [Member] | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Debt securities available for sale 157   82      
Commercial non-agency | Level 3 [Member] | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Debt securities available for sale 0   0      
Corporate and other debt securities            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Debt securities available for sale 430   441      
Corporate and other debt securities | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Debt securities available for sale 430   441      
Corporate and other debt securities | Level 1 [Member] | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Debt securities available for sale 0   0      
Corporate and other debt securities | Level 2 [Member] | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Debt securities available for sale 428   439      
Corporate and other debt securities | Level 3 [Member] | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Debt securities available for sale 2   2      
Residential Mortgage            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Servicing Asset at Fair Value, Amount 958 $ 954 970 $ 988 $ 979 $ 1,007
Residential Mortgage | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Servicing Asset at Fair Value, Amount 958   970      
Residential Mortgage | Level 1 [Member] | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Servicing Asset at Fair Value, Amount 0   0      
Residential Mortgage | Level 2 [Member] | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Servicing Asset at Fair Value, Amount 0   0      
Residential Mortgage | Level 3 [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Servicing Asset at Fair Value, Amount 958   970      
Residential Mortgage | Level 3 [Member] | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Servicing Asset at Fair Value, Amount 958   970      
Commercial Real Estate            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Servicing Asset at Fair Value, Amount 93 $ 93 93 $ 93 $ 94 $ 97
Commercial Real Estate | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Servicing Asset at Fair Value, Amount 93   93      
Commercial Real Estate | Level 1 [Member] | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Servicing Asset at Fair Value, Amount 0   0      
Commercial Real Estate | Level 2 [Member] | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Servicing Asset at Fair Value, Amount 0   0      
Commercial Real Estate | Level 3 [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Servicing Asset at Fair Value, Amount     93      
Commercial Real Estate | Level 3 [Member] | Recurring Fair Value Measurements            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Servicing Asset at Fair Value, Amount $ 93   $ 93