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Statement of Stockholders' Equity [Abstract] Local Phone Number Local Phone Number Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Less than 12 months, Gross unrealized losses Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Total revenues Revenues Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Axis] Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Executive Category: Executive Category [Axis] Comprehensive income (loss): Partners' Capital, Comprehensive Income [Abstract] Subtotal Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value Liabilities and equity Liabilities and Equity [Abstract] Reinsurance Reinsurance [Text Block] All Award Types Award Type [Domain] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Fair value Fair Value Disclosures [Text Block] Level 3  Fair Value, Inputs, Level 3 [Member] PEO Name PEO Name Total paid Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid Other assets Other Assets Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Change in allowance for credit losses on fixed maturity securities Debt Securities, Available-for-Sale, Allowance for Credit Loss, Period Increase (Decrease) Private Placement Investments Private Placement Investments [Member] Private Placement Investments Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Effects of Reinsurance [Table] Effects of Reinsurance [Table] Reclassification out of Accumulated Other Comprehensive Income Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Non-NEOs Non-NEOs [Member] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Nature of business, organization structure and basis of presentation Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Debt Instrument [Axis] Debt Instrument [Axis] Measurement Frequency [Domain] Measurement Frequency [Domain] Stock-based compensation expense Share-Based Payment Arrangement, Noncash Expense Cash paid to Genworth Dividends, Cash Investment, Name [Domain] Investment, Name [Domain] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Due after five years through ten years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 Basic (in usd per share) Net income per common share, basic (in usd per share) Earnings Per Share, Basic Equity, Class of Treasury Stock [Line Items] Equity, Class of Treasury Stock [Line Items] Measurement Input Type [Axis] Measurement Input Type [Axis] Repurchase of common stock Payments for repurchase of common stock Payments for Repurchase of Common Stock Statistical Measurement [Axis] Statistical Measurement [Axis] Insider Trading Arrangements [Line Items] Line of credit facility, additional borrowing capacity Line of Credit Facility, Accordion Feature, Increase Limit Line of Credit Facility, Accordion Feature, Increase Limit Award Type Award Type [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Retained earnings Retained Earnings (Accumulated Deficit) Product and Service [Axis] Product and Service [Axis] Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Common stock Common Stock [Member] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Reclassification out of Accumulated Other Comprehensive Income [Table] Reclassification out of Accumulated Other Comprehensive Income [Table] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover [Abstract] Insurance [Abstract] Total gains (losses) attributable to assets still held included in OCI Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), OCI Fair Value Measurement Inputs and Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Table] Reinsurance Retention Policy [Table] Reinsurance Retention [Table] Equity Awards Adjustments Equity Awards Adjustments [Member] Percentage of portfolio priced using third-party pricing services Debt Securities, Available-for-Sale, Excluding Accrued Interest, Percentage Of Portfolio Priced Using Third-Party Pricing Services Debt Securities, Available-for-Sale, Excluding Accrued Interest, Percentage Of Portfolio Priced Using Third-Party Pricing Services Assumed Assumed Premiums Earned Net realized gains (losses) Debt Securities, Available-for-Sale, Realized Gain (Loss) Total liabilities and equity Liabilities and Equity Employee Stock Option Share-Based Payment Arrangement, Option [Member] Purchases Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Industry Sector [Domain] Industry Sector [Domain] Other liabilities Increase (Decrease) in Other Operating Liabilities Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Asset Class [Axis] Asset Class [Axis] Related Party [Domain] Related and Nonrelated Parties [Domain] Premiums receivable Increase (Decrease) in Premiums Receivable Tabular List, Table Tabular List [Table Text Block] Additional paid-in capital Additional Paid in Capital Reinsurance recoverable, beginning balance Reinsurance recoverable, ending balance Reinsurance Recoverable for Unpaid Claims and Claims Adjustments Schedule of Unrealized Gain (Loss) on Investments Unrealized Gain (Loss) on Investments [Table Text Block] Loss reserves Liability for Future Policy Benefits and Unpaid Claims Disclosure [Text Block] Short-term investments Short-Term Investments [Member] Name Awards Close in Time to MNPI Disclosures, Individual Name Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Ceded Ceded Premiums Written General and administrative expense General and Administrative Expense Summary of Net Investment Gains (Losses) Schedule of Realized Gain (Loss) [Table Text Block] Adjustment to Compensation: Adjustment to Compensation [Axis] Commercial mortgage-backed Commercial Mortgage-Backed Securities [Member] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Statement of Cash Flows [Abstract] Credit Facility [Axis] Credit Facility [Axis] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Total Assets, Fair Value Disclosure Name Measure Name Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward] Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward] Income taxes Income Tax Disclosure [Text Block] Amounts payable to Genworth Accounts Payable, Current Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Less than 12 months, Number of securities Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions Debt Instrument [Line Items] Debt Instrument [Line Items] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Loss reserves Increase (Decrease) in Liability for Claims and Claims Adjustment Expense Reserve Income taxes Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain (Loss), Tax Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain (Loss), Tax Additional paid-in capital Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Fair value Debt Securities, Available-for-Sale, Unrealized Loss Position Short-term investments, at fair value Short-Term Investments Name Trading Arrangement, Individual Name Cash and cash equivalents Cash and Cash Equivalent Company Selected Measure Amount Company Selected Measure Amount Limited Partnership Limited Partnership [Member] Limited Partnership Investments, Debt and Equity Securities [Abstract] Net premiums earned: Premiums Earned, Net [Abstract] Schedule of Unrealized Losses and FV of Fixed Maturity Securities Available for Sale Gain (Loss) on Securities [Table Text Block] Total gains (losses) attributable to assets still held included in net income Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) 2022 Revolving Credit Facility 2022 Revolving Credit Facility [Member] 2022 Revolving Credit Facility Gross investment income before expenses and fees Gross Investment Income, Operating Non-PEO NEO Non-PEO NEO [Member] Senior Notes Senior Notes [Member] Entity Address, Address Line One Entity Address, Address Line One Total losses and expenses Benefits, Losses and Expenses U.S. corporate Debt Security, Corporate, US [Member] Provision for income taxes Benefit (expense) from income taxes Income Tax Expense (Benefit) Assets held by insurance regulators Assets Held by Insurance Regulators Award Timing Method Award Timing Method [Text Block] Net increase (decrease) in cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Amounts receivable from Genworth Accounts and Financing Receivable, after Allowance for Credit Loss, Current Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Premiums receivable Premiums Receivable, Net AOCI Attributable to Parent, Net of Tax [Roll Forward] AOCI Attributable to Parent, Net of Tax [Roll Forward] Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Statement [Table] Statement [Table] Senior Notes, Due 2025 Senior Notes, Due 2025 [Member] Senior Notes, Due 2025 Restatement Determination Date: Restatement Determination Date [Axis] Utilities Industry Group Utilities Industry Group [Member] Utilities Industry Group Schedule of Accumulated Other Comprehensive Income (Loss) Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Amortization of deferred acquisition costs and intangibles Amortization of deferred acquisition costs and intangibles Amortization Of Deferred Policy Acquisition Costs And Intangibles Amortization Of Deferred Policy Acquisition Costs And Intangibles Revenues: Revenues [Abstract] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Reinsurance Retention Policy [Line Items] Reinsurance Retention [Line Items]