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Borrowings and Other Financings - Additional Information (Detail) - USD ($) $ in Millions |  | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2022 | Jun. 30, 2024 | May 28, 2024
Genworth Holdings | Floating Rate Junior Subordinated Notes, due 2066 |  |  |
Debt Instrument [Line Items] |  |  |
Aggregate principal amount of notes repurchased |  | $ 18 |
Debt instrument, maturity year |  | 2066 |
Pre-tax gain (loss) on early extinguishment of debt |  | $ 3 |
Enact Holdings | Revolving Credit Facility |  |  |
Debt Instrument [Line Items] |  |  |
Debt Instrument, Term | 5 years |  |
Line of credit facility, maximum borrowing capacity | $ 200 |  |
Line of credit facility, additional borrowing capacity | $ 100 |  |
Enact Holdings | 6.25% Senior Notes, due 2029 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument face amount |  |  | $ 750
Long-term debt maturity date |  | May 28, 2029 |
Interest rate |  | 6.25% |
Long term debt terms of interest payment |  | payable semi-annually in arrears on May 28 and November 28 of each year |
Debt instrument, maturity year |  | 2029 |
Debt instrument featured call date |  | Apr. 28, 2029 |
Debt instrument basis spread |  | 0.30% |
Debt instrument, redemption price, percentage |  | 100.00% |
Enact Holdings | 6.50% Senior Notes, due 2025 |  |  |
Debt Instrument [Line Items] |  |  |
Interest rate |  | 6.50% |
Debt instrument, maturity year |  | 2025 |
Pre-tax gain (loss) on early extinguishment of debt |  | $ (11) |

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