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Investments (Investment Related Gains (Losses) Net) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Debt Securities, Available-for-sale [Abstract] |  |  |
Other than Temporary Impairment Losses, Investments | $ (6) | $ (11) | $ (20)
Impairment Losses On Debt Securities Available for Sale | (17) | (1) | (1)
Available-for-sale Securities, Realized Losses, Excluding Other than Temporary Impairments | (396) | (65) | (82)
Gain (Loss) on Sale of Equity Investments | (21) | 25 | (15)
Available-for-sale Securities, Gross Realized Gains | 192 | 299 | 114
Other Impairment Losses And Change In Mortgage Loan Provision | (16) | 29 | (38)
Change in fair value of certain limited partnership investments and other, net | 38 | 169 | 0
Limited partnerships and real estate joint ventures impairment losses | 0 | 0 | (18)
Derivatives And Other Investments Net | 21 | 25 | 24
Gain (Loss) on Sale of Derivatives | (301) | 90 | 3
Realized Investment Gains (Losses) | $ (506) | $ 560 | $ (33)

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- Definition Net realized gains or losses on investments during the period related to the change in value of embedded derivatives and other realized gains and losses not otherwise categorized. + References No definition available. + Details
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- Definition Impairment Losses On Debt Securities Available for Sale + References No definition available. + Details
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- Definition Gains (losses) on limited partnerships and real estate joint ventures impairments + References No definition available. + Details
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- Definition Other impairment losses and change in mortgage loan provision. + References No definition available. + Details
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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 realized gain on 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 9 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27357-111563 + Details
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- Definition Amount of realized loss on 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 9 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27357-111563 + Details
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- Definition The difference between the book value and the sale price of options, swaps, futures, forward contracts, and other derivative instruments. This element refers to the gain (loss) included in earnings. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13(h)) -URI https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 + Details
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