v3.25.2
Guarantee Arrangements, Pledged Assets and Repurchase Agreements, Collateral Pledged and Remaining Contractual Maturity of Repurchase Agreements Accounted for as Secured Borrowings (Details) - U.S. Treasury, U.S. Government sponsored and U.S. Government agency securities - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]    
Collateral pledged and remaining contractual maturity of repurchase agreements accounted for as secured borrowings $ 6,717 $ 4,611
Overnight and Continuous    
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]    
Collateral pledged and remaining contractual maturity of repurchase agreements accounted for as secured borrowings 4,281 2,099
Up to 30 Days    
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]    
Collateral pledged and remaining contractual maturity of repurchase agreements accounted for as secured borrowings 64 1,257
31 to 90 Days    
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]    
Collateral pledged and remaining contractual maturity of repurchase agreements accounted for as secured borrowings 515 450
91 Days to One Year    
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]    
Collateral pledged and remaining contractual maturity of repurchase agreements accounted for as secured borrowings 1,857 805
Greater Than One Year    
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]    
Collateral pledged and remaining contractual maturity of repurchase agreements accounted for as secured borrowings $ 0 $ 0