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Exit of Property and Casualty Insurance Business - (Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Disposal Group Not Discontinued Operation Disposal Disclosures [Abstract] |  |  |
Impairment losses on exit of business | $ 0 | $ 55 | $ 0
Revenues | 119 | 138 | 136
Gain on disposition of business | 12 |  |
Income (loss) before income taxes | $ 17 | $ 86 | $ 2

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