v3.25.2
Fair Value Measurements - Narrative (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]          
Unfunded commitments, equity securities measured at net asset value $ 20   $ 20   $ 20
Revaluation period     90 days    
Deferred fee income 7   $ 7   3
Unfunded Loan Commitment          
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]          
Deferred fee income 157   157   $ 168
Level 3          
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]          
Transfers Out of Level 3 737 $ 111 1,341 $ 246  
Transfers into Level 3 854 35 1,200 48  
Level 3 | Equity contracts - bilateral OTC(2)          
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]          
Derivatives, net, Transfers out of Level 3 (33) (8) 9 (17)  
Level 3 | Long-term debt          
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]          
Transfers Out of Level 3 613 104 1,151 232  
Transfers into Level 3 679 34 957 47  
Level 3 | Deposits          
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]          
Transfers Out of Level 3 124 7 190 14  
Transfers into Level 3 $ 175 $ 1 $ 243 $ 1