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v3.20.2

Business Dispositions - Carrying Value of Assets and Liabilities to be Transferred in Sale (Details) - USD ($) $ in Millions | Sep. 30, 2020 | Dec. 31, 2019
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Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Disposal Group, Including Discontinued Operation, Assets | $ 167 | $ 0
Disposal Group, Including Discontinued Operation, Liabilities, Total | 153 | $ 0
Continental Europe Operations [Member] |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Disposal Group, Including Discontinued Operation, Cash and Cash Equivalents | 138 |
Disposal Group, Including Discontinued Operation, Other Assets | 29 |
Disposal Group, Including Discontinued Operation, Assets | 167 |
Disposal Group, Including Discontinued Operation, Unpaid losses and loss adjustment expenses | 74 |
Disposal Group, Including Discontinued Operation, Deferred Revenue | 35 |
Disposal Group, Including Discontinued Operation, Other Liabilities | 44 |
Disposal Group, Including Discontinued Operation, Liabilities, Total | 153 |
Disposal Group, Including Discontinued Operation, Consideration | 14 |
Continental Europe Operations [Member] | Fair Value, Recurring [Member] | Fixed Maturities and Short-Term Investments [Member] | Available-for-sale Securities [Member] |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Assets Held-for-sale, Long Lived, Fair Value Disclosure | 80 |
Continental Europe Operations [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Recurring [Member] | Fixed Maturities and Short-Term Investments [Member] | Available-for-sale Securities [Member] |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Assets Held-for-sale, Long Lived, Fair Value Disclosure | 2 |
Continental Europe Operations [Member] | Significant Observable Inputs (Level 2) | Fair Value, Recurring [Member] | Fixed Maturities and Short-Term Investments [Member] | Available-for-sale Securities [Member] |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Assets Held-for-sale, Long Lived, Fair Value Disclosure | 78 |
Continental Europe Operations [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] | Fixed Maturities and Short-Term Investments [Member] | Available-for-sale Securities [Member] |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Assets Held-for-sale, Long Lived, Fair Value Disclosure | $ 66 |

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