v3.25.2
Derivative Financial Instruments - Carrying Amount and Cumulative Basis Adjustments for Hedge Accounting (Details) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Prepayable financial asset closed portfolio, amortized cost $ 3,700 $ 3,320
Prepayable financial asset closed portfolio, last-of-layer, amortized cost 1,820 1,820
Cumulative adjustment associated with hedging relationships 23 (26)
Hedged Items Currently Designated | Long-term debt    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Carrying Amount of Hedged Assets/Liabilities 16,352 15,951
Cumulative Hedge Accounting Basis Adjustments (78) (323)
Hedged Items Currently Designated | Available-for-sale securities    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Carrying Amount of Hedged Assets/Liabilities 21,818 18,666
Cumulative Hedge Accounting Basis Adjustments 45 (376)
De-designated | Long-term debt    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Cumulative Hedge Accounting Basis Adjustments 85 103
De-designated | Available-for-sale securities    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Cumulative Hedge Accounting Basis Adjustments $ 1 $ 1