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Investments - Interest and Investment Income (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2023 | Mar. 31, 2022
Schedule of Investments [Line Items] |  |
Gross investment income | $ 673 | $ 524
Investment expense | (62) | (46)
Interest and investment income | 611 | 478
Fixed maturity securities, available-for-sale |  |
Schedule of Investments [Line Items] |  |
Gross investment income | 447 | 332
Equity securities |  |
Schedule of Investments [Line Items] |  |
Gross investment income | 8 | 8
Preferred securities |  |
Schedule of Investments [Line Items] |  |
Gross investment income | 13 | 15
Mortgage loans |  |
Schedule of Investments [Line Items] |  |
Gross investment income | 51 | 39
Invested cash and short-term investments |  |
Schedule of Investments [Line Items] |  |
Gross investment income | 33 | 5
Limited partnerships |  |
Schedule of Investments [Line Items] |  |
Gross investment income | 57 | 113
Tax deferred property exchange income |  |
Schedule of Investments [Line Items] |  |
Gross investment income | 45 | 3
Other investments |  |
Schedule of Investments [Line Items] |  |
Gross investment income | $ 19 | $ 9

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- Definition Amount, before investment expense, of income earned from investments in securities and real estate. Includes, but is not limited to, real estate investment, policy loans, dividends, and interest. Excludes realized gain (loss) on investments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.2) -URI https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 + Details
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- Definition Amount, after investment expense, of income earned from investments in securities and real estate. Includes, but is not limited to, real estate investment, policy loans, dividends, and interest. Excludes realized gain (loss) on investments. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(2)) -URI https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 + Details
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