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Investments (Narrative) (Details) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2020 USD ($) | Sep. 30, 2019 USD ($) | Sep. 30, 2020 USD ($) | Sep. 30, 2019 USD ($) | Dec. 31, 2019 USD ($)
Investment Narrative [Line Items] |  |  |  |  |
Equity Release Mortgages |  |  | $ 2 |  |
Loans Modified Due to COVID |  |  | $ 620 |  |
Document Period End Date |  |  | Sep. 30, 2020 |  |
Fair Value, Option, Loans Held as Assets, Aggregate Amount in Nonaccrual Status | $ 20 |  | $ 20 |  |
Financing Receivable, Allowance for Credit Loss | 19 |  | 19 |  |
Funds Held Under Reinsurance Agreements Asset Specific Client | 3,200 |  | 3,200 |  |
Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Cash | 4 |  | 4 |  | $ 1
Net Amount Assets Liabilities From Repurchase Reverse Repurchase Agreements | 4 |  | 4 |  | $ 1
Available-for-sale Securities, Realized Losses, Excluding Other than Temporary Impairments | $ 22 | $ 13 | $ 76 | $ 39 |
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | 1,289 |  | 1,289 |  | 1,072
Securities As Percentage Of Consolidated Stockholder Equity | 10.00% |  | 10.00% |  |
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total | 100.00% |  | 100.00% |  | 100.00%
Funds withheld at interest | $ 5,403 |  | $ 5,403 |  | $ 5,662
Fixed maturity securities |  |  |  |  |
Investment Narrative [Line Items] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss | 19 |  | 19 |  | 0
Fixed maturity securities | Corporate Debt Securities [Member] |  |  |  |  |
Investment Narrative [Line Items] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss | $ 19 |  | $ 19 |  | $ 0
CALIFORNIA |  |  |  |  |
Investment Narrative [Line Items] |  |  |  |  |
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total | 14.60% |  | 14.60% |  |
TEXAS |  |  |  |  |
Investment Narrative [Line Items] |  |  |  |  |
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total | 14.50% |  | 14.50% |  |
WASHINGTON |  |  |  |  |
Investment Narrative [Line Items] |  |  |  |  |
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total | 8.70% |  | 8.70% |  |
CANADA |  |  |  |  |
Investment Narrative [Line Items] |  |  |  |  |
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total | 3.00% |  | 3.00% |  |
UNITED KINGDOM |  |  |  |  |
Investment Narrative [Line Items] |  |  |  |  |
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total | 0.90% |  | 0.90% |  |

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- Definition The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented. If there is no historical data in the report, use the filing date. The format of the date is CCYY-MM-DD. + References No definition available. + Details
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