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Derivatives - Offsetting Liabilities (Details) - USD ($) $ in Millions | Jun. 30, 2021 | Dec. 31, 2020
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Offsetting of Financial Liabilities under Master Netting Agreements with Derivative Counterparties |  |
Gross Amounts of Derivative Liabilities Presented in the Consolidated Balance Sheet | $ 72 | $ 106
Net Amount of Derivative Liabilities | 41 | 95
Derivatives subject to master netting agreements |  |
Offsetting of Financial Liabilities under Master Netting Agreements with Derivative Counterparties |  |
Gross Amounts of Derivative Liabilities Presented in the Consolidated Balance Sheet | 72 | 106
Gross Amount of Eligible Offsetting Recognized Derivative Assets | 31 | 11
Net Amount of Derivative Liabilities | $ 41 | $ 95

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