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Derivative Financial Instruments and Off-balance Sheet Financial Instruments - Schedule of Gross and Net Amounts for OTC Derivatives (Details) - OTC derivatives - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Asset derivatives    
Gross amount $ 21 $ 3
Counter- party netting (1) (6)
Cash collateral (received) pledged (18) 4
Net amount on balance sheet 2 1
Securities collateral (received) pledged 0 0
Net amount 2 1
Liability derivatives    
Gross amount (1) (10)
Counter- party netting 1 6
Cash collateral (received) pledged 0 2
Net amount on balance sheet 0 (2)
Securities collateral (received) pledged 0 0
Net amount $ 0 $ (2)