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Investments - Net Realized Capital Gains (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Schedule of Investments [Line Items] |  |  |
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Sell before Recovery | $ (3) | $ 0 | $ 0
Total net realized capital gains (losses) | (627) | 509 | (14)
Translation Adjustment Functional to Reporting Currency, Increase (Decrease), Gross of Tax | 28 | $ (1) | $ (1)
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal, Statement of Income or Comprehensive Income [Extensible Enumeration] |  | Total net realized capital gains (losses) | Total net realized capital gains (losses)
Realized Investment Gains Losses |  |  |
Schedule of Investments [Line Items] |  |  |
Equity Securities, FV-NI, Unrealized Gain (Loss) | (108) | $ 155 | $ 53
Non-qualifying |  |  |
Schedule of Investments [Line Items] |  |  |
Derivative, Gain (Loss) on Derivative, Net | 46 | 12 | 104
Other investments |  |  |
Schedule of Investments [Line Items] |  |  |
Other, net | 11 | 39 | 47
Total fixed maturities |  |  |
Schedule of Investments [Line Items] |  |  |
Debt Securities, Available-for-Sale, Realized Gain | 57 | 319 | 255
Debt Securities, Available-for-sale, Realized Loss | (315) | (89) | (50)
Debt Securities, Available-for-sale, Allowance for Credit Loss, Period Increase (Decrease) | (18) | 4 | (28)
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Sell before Recovery | 6 | 0 | 5
Equity Securities [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Equity Securities, FV-NI, Realized Gain (Loss) | (83) | 81 | (118)
Equity Securities, FV-NI, Unrealized Gain (Loss) | (266) | 146 | (96)
Debt and Equity Securities, Gain (Loss) | (349) | 227 | (214)
Mortgage loans |  |  |
Schedule of Investments [Line Items] |  |  |
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease) | $ (7) | $ 9 | $ (19)

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- Definition Amount of increase (decrease) in allowance for credit loss 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/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 9 -URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922900-210455 + Details
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- Definition Amount of decrease in allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) from intent to sell or more likely than not will be required to sell before recovery of amortized cost basis. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 9 -Subparagraph (e) -URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922900-210455 + Details
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