v3.25.1
Fair Value Disclosures - Measured on a Nonrecurring Basis (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Loans Receivable, Fair Value Disclosure $ 12   $ 13
Level 3      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Loans Receivable, Fair Value Disclosure 12   13
Level 2      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Loans Receivable, Fair Value Disclosure 0   0
LHFS | Nonrecurring | Level 3      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Carrying value: 0   4
Valuation adjustments: (40) $ (9)  
LHFS | Nonrecurring | Level 2      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Carrying value: 42   0
Loans and Leases | Nonrecurring | Level 3      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Carrying value: [1] 324   525
Valuation adjustments: (220) (272)  
Loans Receivable, Fair Value Disclosure 610   682
Other | Nonrecurring | Level 3      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Carrying value: 99   $ 147
Valuation adjustments: $ (87) $ (83)  
[1] Total loans and leases measured at fair value on a nonrecurring basis still held as of period end were $610 million and $682 million at March 31, 2025 and December 31, 2024, respectively.