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Equity - Statutory Results (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Statutory Accounting Practices [Line Items] |  |  |
Statutory Net Income | $ 1,908 | $ 1,904 | $ 1,700
Statutory Capital | 13,396 | 12,852 |
Group Insurance Policy [Member] |  |  |
Statutory Accounting Practices [Line Items] |  |  |
Statutory Net Income | 310 | 513 | 390
Statutory Capital | 2,601 | 2,644 |
Property and Casualty Insurance Subsidiaries |  |  |
Statutory Accounting Practices [Line Items] |  |  |
Statutory Net Income | 1,598 | 1,391 | 1,114
Statutory Capital | 10,795 | 10,208 |
Life and Annuity Run-Off Business |  |  |
Statutory Accounting Practices [Line Items] |  |  |
Statutory Net Income | $ 0 | $ 0 | $ 196

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