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Consolidated Balance Sheet (Parenthetical) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
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Statement of Financial Position [Abstract] |  |
Fixed maturies, available for sale, amortized cost | $ 10,193 | $ 8,812
Fixed maturities, available for sale, allowance for expected credit losses | $ 9 | $ 12
Common Stock, par value (USD per share) | $ 0 | $ 0
Common Stock, Shares Authorized | 200,000,000 | 200,000,000
Common Stock, Shares, Outstanding | 84,920,965 | 86,345,246

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- Definition Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27161-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454 + Details
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