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Investments (Components of other-than-temporary impairment losses recognized in earnings) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items] |  |  |
Impairment (gains) losses recognized in earnings | $ 31 | $ 111 | $ 44
Corporate and other bonds |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Impairment (gains) losses recognized in earnings | 11 | 87 | 33
Asset-backed |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Impairment (gains) losses recognized in earnings | $ 20 | $ 24 | $ 11

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- Definition Amount of other-than-temporary impairment (OTTI) on investment in debt security, recognized in earnings. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 8A -URI http://asc.fasb.org/extlink&oid=124260329&loc=SL6284422-111562 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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