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Schedule of Pre-Tax Income (Loss) Effects of Cash Flow Hedges (Detail) - Cash Flow Hedges - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |
Gain (loss) recognized in OCI | $ (108) | $ (106) | $ (266) | $ 39
Gain (loss) reclassified into net income from OCI | 52 | 58 | 108 | 119
Gain (loss) recognized in net income (loss) | 0 | 0 | 0 | 0
Interest Rate Swaps Hedging Assets | Net Investment Income |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |
Gain (loss) recognized in OCI | (77) | (104) | (225) | 42
Gain (loss) reclassified into net income from OCI | 52 | 55 | 105 | 109
Interest Rate Swaps Hedging Assets | Gain (Loss) on Investments |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |
Gain (loss) recognized in OCI | 0 | 0 | 0 | 0
Gain (loss) reclassified into net income from OCI | 1 | 3 | 5 | 8
Gain (loss) recognized in net income (loss) | 0 | 0 | 0 | 0
Interest Rate Swaps Hedging Liabilities | Interest Expense |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |
Gain (loss) recognized in OCI | 0 |  | 0 | 0
Gain (loss) reclassified into net income from OCI | (1) |  | (2) | (1)
Interest Rate Swaps Hedging Liabilities | Gain (Loss) on Investments |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |
Gain (loss) recognized in OCI |  |  |  | 0
Gain (loss) reclassified into net income from OCI |  |  |  | 1
Gain (loss) recognized in net income (loss) | 0 |  | 0 | 0
Foreign currency swaps | Net Investment Income |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |
Gain (loss) recognized in OCI | 2 | (2) | 3 | (3)
Gain (loss) reclassified into net income from OCI | 0 | 0 | 0 | 0
Foreign currency swaps | Gain (Loss) on Investments |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |
Gain (loss) recognized in OCI |  |  |  | 0
Gain (loss) reclassified into net income from OCI |  |  |  | 2
Gain (loss) recognized in net income (loss) | 0 | $ 0 | 0 | $ 0
Forward Bond Purchase Commitments | Gain (Loss) on Investments |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |
Gain (loss) recognized in OCI | (33) |  | (44) |
Gain (loss) reclassified into net income from OCI | 0 |  | 0 |
Gain (loss) recognized in net income (loss) | $ 0 |  | $ 0 |

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