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Derivative Instruments - Summary of Gross Fair Values of Individual Derivative Instruments (Detail) - USD ($) | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Derivatives, Fair Value [Line Items] |  |
Derivative Asset, Fair Value, Gross Asset | $ 28,000,000 | $ 76,000,000
Derivative Asset, Fair Value, Amount Offset Against Collateral | 0 | 0
Net Amounts of Assets Presented in the Consolidated Balance Sheet, Derivative Assets | 27,000,000 | 76,000,000
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet, Derivative Liabilities | 38,000,000 | 95,000,000
Derivative Liabilities Gross Amount Of Collateral Cash And Securities Pledged Not Offset |  | 93,000,000
Fair value of derivative liabilities | 38,000,000 |
Net Amount, Derivative Assets | 27,000,000 | 76,000,000
Net Amount, Derivative Liabilities | 0 | 2,000,000
Derivative Asset, Fair Value, Amount Not Offset Against Collateral | 0 | 0
Derivative Liability, Fair Value, Gross Liability | 38,000,000 | 95,000,000
Derivative Liability, Fair Value, Amount Offset Against Collateral | 0 | 0
Derivative, Collateral, Obligation to Return Cash | 0 | 0
Variable Interest Entity [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Asset, Fair Value, Gross Asset | 239,000,000 | 38,000,000
Derivative Asset, Fair Value, Amount Offset Against Collateral | 0 | 0
Net Amounts of Assets Presented in the Consolidated Balance Sheet, Derivative Assets | 239,000,000 | 38,000,000
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet, Derivative Liabilities | 1,048,000,000 | 1,940,000,000
Derivative Liabilities Gross Amount Of Collateral Cash And Securities Pledged Not Offset |  | 0
Fair value of derivative liabilities | 0 |
Net Amount, Derivative Assets | 239,000,000 | 38,000,000
Net Amount, Derivative Liabilities | 1,048,000,000 | 1,940,000,000
Derivative Asset, Fair Value, Amount Not Offset Against Collateral | 0 | 0
Derivative Liability, Fair Value, Gross Liability | 1,048,000,000 | 1,940,000,000
Derivative Liability, Fair Value, Amount Offset Against Collateral | 0 | 0
Other Credit Derivatives [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet, Derivative Liabilities |  | 0
Net Amount, Derivative Liabilities |  | 0
Derivative Liability, Fair Value, Gross Liability |  | 0
Derivative Liability, Fair Value, Amount Offset Against Collateral |  | 0
Interest Rate Swaps [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Asset, Fair Value, Gross Asset | 27,000,000 | 76,000,000
Derivative Asset, Fair Value, Amount Offset Against Collateral | 0 | 0
Net Amounts of Assets Presented in the Consolidated Balance Sheet, Derivative Assets | 27,000,000 | 76,000,000
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet, Derivative Liabilities | 38,000,000 | 94,000,000
Fair value of derivative liabilities | 38,000,000 | 93,000,000
Net Amount, Derivative Assets | 27,000,000 | 76,000,000
Net Amount, Derivative Liabilities | 0 | 1,000,000
Derivative Asset, Fair Value, Amount Not Offset Against Collateral |  | 0
Derivative Liability, Fair Value, Gross Liability | 38,000,000 | 94,000,000
Derivative Liability, Fair Value, Amount Offset Against Collateral | 0 | 0
Interest Rate Swaps [Member] | Variable Interest Entity [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Asset, Fair Value, Gross Asset | 190,000,000 |
Derivative Asset, Fair Value, Amount Offset Against Collateral | 0 |
Net Amounts of Assets Presented in the Consolidated Balance Sheet, Derivative Assets | 190,000,000 |
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet, Derivative Liabilities | 1,048,000,000 | 1,940,000,000
Net Amount, Derivative Assets | 190,000,000 |
Net Amount, Derivative Liabilities | 1,048,000,000 | 1,940,000,000
Derivative Liability, Fair Value, Gross Liability | 1,048,000,000 | 1,940,000,000
Interest Rate Swaps [Member] | Variable Interest Entity [Member] | Level 3 [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Asset, Fair Value, Gross Asset | 0 |
Currency Swaps [Member] | Variable Interest Entity [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Asset, Fair Value, Gross Asset | 49,000,000 | 38,000,000
Derivative Asset, Fair Value, Amount Offset Against Collateral | 0 |
Net Amounts of Assets Presented in the Consolidated Balance Sheet, Derivative Assets | 49,000,000 | 38,000,000
Net Amount, Derivative Assets | 49,000,000 | 38,000,000
Derivative Asset, Fair Value, Amount Not Offset Against Collateral |  | $ 0
Warrant [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Asset, Fair Value, Gross Asset | 1,000,000 |
Net Amounts of Assets Presented in the Consolidated Balance Sheet, Derivative Assets | 1,000,000 |
Net Amount, Derivative Assets | $ 1,000,000 |

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