v3.25.2
Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis (Details) - Nonrecurring - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis        
Assets, fair value $ 434 $ 275 $ 434 $ 275
Fair value adjustment (81) (45) (206) (99)
Level 1        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis        
Assets, fair value 0 0 0 0
Level 2        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis        
Assets, fair value 13 0 13 0
Level 3        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis        
Assets, fair value 421 275 421 275
Commercial loans held for sale | Commercial        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis        
Assets, fair value   4   4
Fair value adjustment   0   0
Commercial loans held for sale | Commercial | Level 1        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis        
Assets, fair value   0   0
Commercial loans held for sale | Commercial | Level 2        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis        
Assets, fair value   0   0
Commercial loans held for sale | Commercial | Level 3        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis        
Assets, fair value   4   4
Commercial loans and leases | Commercial        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis        
Assets, fair value 222 67 222 67
Fair value adjustment (78) (44) (204) (104)
Commercial loans and leases | Commercial | Level 1        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis        
Assets, fair value 0 0 0 0
Commercial loans and leases | Commercial | Level 2        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis        
Assets, fair value 0 0 0 0
Commercial loans and leases | Commercial | Level 3        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis        
Assets, fair value 222 67 222 67
Consumer and residential mortgage loans | Consumer        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis        
Assets, fair value 194 196 194 196
Fair value adjustment (3) 0 (7) (3)
Consumer and residential mortgage loans | Consumer | Level 1        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis        
Assets, fair value 0 0 0 0
Consumer and residential mortgage loans | Consumer | Level 2        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis        
Assets, fair value 0 0 0 0
Consumer and residential mortgage loans | Consumer | Level 3        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis        
Assets, fair value 194 196 194 196
OREO        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis        
Assets, fair value 5 5 5 5
Fair value adjustment 0 (1) 1 (1)
OREO | Level 1        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis        
Assets, fair value 0 0 0 0
OREO | Level 2        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis        
Assets, fair value 0 0 0 0
OREO | Level 3        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis        
Assets, fair value 5 5 5 5
Bank premises and equipment        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis        
Assets, fair value   3   3
Fair value adjustment   0   0
Bank premises and equipment | Level 1        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis        
Assets, fair value   0   0
Bank premises and equipment | Level 2        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis        
Assets, fair value   0   0
Bank premises and equipment | Level 3        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis        
Assets, fair value   3   3
Private equity investments        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis        
Assets, fair value 13 0 13 0
Fair value adjustment 0 0 4 9
Private equity investments | Level 1        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis        
Assets, fair value 0 0 0 0
Private equity investments | Level 2        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis        
Assets, fair value 13 0 13 0
Private equity investments | Level 3        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis        
Assets, fair value $ 0 $ 0 $ 0 $ 0