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Investments (Investment Related Gains (Losses) Net) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Investment Gains And Losses [Abstract] |  |  |  |
Gain on investment activity | $ (53) | $ (46) | $ (220) | $ (73)
Available-for-sale Securities, Realized Losses, Excluding Other than Temporary Impairments | (30) | (46) | (43) | (54)
Gain (Loss) on Sale of Equity Investments | 20 | 8 | 23 | (15)
Other impairment losses and change in mortgage loan provision | 3 | (22) | 21 | (35)
Derivatives and other, net | 29 | 87 | 47 | (156)
Total investment related gains (losses), net | 112 | 81 | 414 | (204)
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net | 5 | 0 | 3 | (34)
Change in Fair Value Limited Partnership Investments and Other Net | $ 32 | $ 8 | $ 143 | $ 17

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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 Other impairment losses and change in mortgage loan provision. + References No definition available. + Details
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- Definition This item represents the gross profit realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. + References No definition available. + Details
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- Definition Amount of loss realized on the sale of debt or equity securities classified as available-for-sale. Excludes other than temporary impairments (OTTI). + 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 http://asc.fasb.org/extlink&oid=124269663&loc=SL82922900-210455 + Details
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- Definition The difference between the carrying value and the sale price of equity securities, not separately or otherwise categorized as trading or available-for-sale. This element includes investments in which the entity holds a small ownership stake (generally, less than 20% of the shares outstanding) and cannot exert significant influence. + References No definition available. + Details
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- Definition Amount of realized gain (loss) on investment. + 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 210.7-04.3(a)) -URI http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 + Details
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