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Investments (Age Analysis of Past Due Recorded Investments) (Details) - USD ($) $ in Millions | 6 Months Ended |
--- | --- | ---
Jun. 30, 2022 | Dec. 31, 2021
Financing Receivable, Past Due [Line Items] |  |
Document Period End Date | Jun. 30, 2022 |
Loans Receivable, Gross, Commercial, Real Estate | $ 6,594 | $ 6,329
Financial Asset, Not Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans Receivable, Gross, Commercial, Real Estate | 6,575 | 6,329
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Loans Receivable, Gross, Commercial, Real Estate | $ 19 | $ 0

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