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Derivatives - Derivative Liabilities and Collateral Pledged (Details) - USD ($) $ in Millions | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Derivative [Line Items] |  |
Gross amounts of recognized liabilities | $ 98 | $ 125
Derivative assets available for offset | 0 | 0
Derivative liability | 98 | 125
Derivative assets available for offset | (43) | (21)
Collateral pledged | (21) | (82)
Net amount | 34 | 22
Derivative liabilities not subject to master netting agreements | 20 | 22
Derivatives, interest rate contracts |  |
Derivative [Line Items] |  |
Gross amounts of recognized liabilities | 74 | 60
Derivative assets available for offset | 0 | 0
Derivative liability | 74 | 60
Derivative assets available for offset | (29) | (7)
Collateral pledged | (12) | (31)
Net amount | 33 | 22
Forward contracts |  |
Derivative [Line Items] |  |
Gross amounts of recognized liabilities | 24 | 65
Derivative assets available for offset | 0 | 0
Derivative liability | 24 | 65
Derivative assets available for offset | (14) | (14)
Collateral pledged | (9) | (51)
Net amount | $ 1 | $ 0

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