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Derivative Instruments - Summary of Gross Fair Values of Individual Derivative Instruments (Details) - USD ($) $ in Millions | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Derivatives, Fair Value [Line Items] |  |
Derivative, Collateral, Right to Reclaim Cash | $ 6 | $ 13
Net Amounts of Assets Presented in the Consolidated Balance Sheet, Derivative Assets | 55 | 76
Derivative Asset, Fair Value, Amount Not Offset Against Collateral | 0 | 0
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet, Derivative Liabilities | 76 | 95
Derivative Liability, Fair Value, Amount Not Offset Against Collateral | 73 |
Gross Amount of Collateral Received/Pledged Not Offset in the Consolidated Balance Sheet, Derivative Liabilities |  | 93
Net Amount, Derivative Assets | 55 | 76
Derivative Asset, Fair Value, Gross Asset | 56 | 76
Derivative Asset, Fair Value, Amount Offset Against Collateral | 0 | 0
Derivative liabilities | 76 | 95
Derivative Liability, Fair Value, Amount Offset Against Collateral | 0 | 0
Derivative Liabilities Net Amount | 3 | 2
Interest Rate Swap [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Net Amounts of Assets Presented in the Consolidated Balance Sheet, Derivative Assets | 55 | 76
Derivative Asset, Fair Value, Amount Not Offset Against Collateral |  | 0
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet, Derivative Liabilities | 74 | 94
Derivative Liability, Fair Value, Amount Not Offset Against Collateral | 73 | 93
Net Amount, Derivative Assets | 55 | 76
Derivative Asset, Fair Value, Gross Asset | 56 | 76
Derivative Asset, Fair Value, Amount Offset Against Collateral | 0 | 0
Derivative liabilities | 75 | 94
Derivative Liability, Fair Value, Amount Offset Against Collateral | 0 | 0
Derivative Liabilities Net Amount | 2 | 1
Other Credit Derivatives [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet, Derivative Liabilities | 1 | 0
Derivative liabilities | 1 | 0
Derivative Liability, Fair Value, Amount Offset Against Collateral | 0 | 0
Derivative Liabilities Net Amount | 1 | 0
Variable Interest Entity, Primary Beneficiary [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Net Amounts of Assets Presented in the Consolidated Balance Sheet, Derivative Assets | 42 | 38
Derivative Asset, Fair Value, Amount Not Offset Against Collateral | 0 | 0
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet, Derivative Liabilities | 1,866 | 1,940
Derivative Liability, Fair Value, Amount Not Offset Against Collateral | 0 |
Gross Amount of Collateral Received/Pledged Not Offset in the Consolidated Balance Sheet, Derivative Liabilities |  | 0
Net Amount, Derivative Assets | 42 | 38
Derivative Asset, Fair Value, Gross Asset | 42 | 38
Derivative Asset, Fair Value, Amount Offset Against Collateral | 0 | 0
Derivative liabilities | 1,866 | 1,940
Derivative Liability, Fair Value, Amount Offset Against Collateral | 0 | 0
Derivative Liabilities Net Amount | 1,866 | 1,940
Variable Interest Entity, Primary Beneficiary [Member] | Interest Rate Swap [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet, Derivative Liabilities | 1,866 | 1,940
Derivative liabilities | 1,866 | 1,940
Derivative Liabilities Net Amount | 1,866 | 1,940
Variable Interest Entity, Primary Beneficiary [Member] | Currency Swaps [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Net Amounts of Assets Presented in the Consolidated Balance Sheet, Derivative Assets | 42 | 38
Derivative Asset, Fair Value, Amount Not Offset Against Collateral |  | 0
Net Amount, Derivative Assets | 42 | 38
Derivative Asset, Fair Value, Gross Asset | 42 | $ 38
Derivative Asset, Fair Value, Amount Offset Against Collateral | $ 0 |

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