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Investments (Changes in Net Unrealized Investment Gains (Losses)) (Details)
$ in Millions
9 Months Ended
Sep. 30, 2022
USD ($)
Investments, Debt and Equity Securities [Abstract]  
Unrealized investment gains (losses), beginning of period $ 3,908
Unrealized investment gains (losses) during the period (17,519)
Unrealized investment gains (losses) relating to: Future policy benefits 3,589
Unrealized investment gains (losses) relating to: DAC, VOBA and DSI 868
Unrealized investment gains (losses) relating to: Deferred income tax benefit (expense) 2,743
Unrealized investment gains (losses), end of period (6,411)
Change in net unrealized investment gains (losses) $ (10,319)