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Derivatives - Offsetting Assets (Details) $ in Millions | 6 Months Ended |
--- | --- | ---
Jun. 30, 2021 USD ($) Counterparty | Dec. 31, 2020 USD ($)
Offsetting of Financial Assets under Master Netting Agreements with Derivative Counterparties |  |
Number of master netting agreements supported by primary counterparty's parent guarantee | Counterparty | 17 |
Number of credit support agreements by primary counterparty | Counterparty | 16 |
Gross Amounts of Derivative Assets Presented in the Consolidated Balance Sheet | $ 75 | $ 44
Net Amount of Derivative Assets | 44 | 33
Derivatives subject to master netting agreements |  |
Offsetting of Financial Assets under Master Netting Agreements with Derivative Counterparties |  |
Gross Amounts of Derivative Assets Presented in the Consolidated Balance Sheet | 74 | 44
Gross Amount of Eligible Offsetting Recognized Derivative Liabilities | 31 | 11
Net Amount of Derivative Assets | 43 | $ 33
Derivatives not subject to master netting agreements |  |
Offsetting of Financial Assets under Master Netting Agreements with Derivative Counterparties |  |
Gross Amounts of Derivative Assets Presented in the Consolidated Balance Sheet | 1 |
Net Amount of Derivative Assets | $ 1 |

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