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Derivatives - Derivative Liabilities and Collateral Pledged (Details) - USD ($) $ in Millions | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Derivative [Line Items] |  |
Gross amounts of recognized liabilities | $ 795 | $ 675
Gross amounts offset in the Balance Sheets | 0 | 0
Net amounts of liabilities presented in the Balance Sheets | 795 | 675
Derivative assets available for offset | (78) | (79)
Collateral pledged | (39) | (169)
Net amount | 678 | 427
Derivative liabilities not subject to master netting agreements | 21 | 24
Interest rate derivative contracts |  |
Derivative [Line Items] |  |
Gross amounts of recognized liabilities | 791 | 666
Gross amounts offset in the Balance Sheets | 0 | 0
Net amounts of liabilities presented in the Balance Sheets | 791 | 666
Derivative assets available for offset | (76) | (75)
Collateral pledged | (38) | (164)
Net amount | 677 | 427
Forward contracts |  |
Derivative [Line Items] |  |
Gross amounts of recognized liabilities | 4 | 9
Gross amounts offset in the Balance Sheets | 0 | 0
Net amounts of liabilities presented in the Balance Sheets | 4 | 9
Derivative assets available for offset | (2) | (4)
Collateral pledged | (1) | (5)
Net amount | $ 1 | $ 0

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