Investments (Net Unrealized Investment Gains Losses) (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Components of net unrealized gains (losses) included in accumulated other comprehensive income
Fixed maturity securities AFS	$ 22,444	$ 15,145
Fixed maturity securities AFS with noncredit OTTI losses included in AOCI	0	32
Total fixed maturity securities AFS	22,444	15,177
Derivatives	3,979	2,043
Other	150	210
Subtotal	26,573	17,430
Future policy benefits	(7,138)	(1,121)
DAC, VOBA and DSI	(1,413)	(1,051)
Policyholder dividend obligation	(2,944)	(2,020)
Subtotal	(11,495)	(4,192)
Deferred income tax benefit (expense) related to noncredit OTTI losses recognized in AOCI	0	(7)
Deferred income tax benefit (expense)	(3,143)	(2,735)
Net unrealized investment gains (losses)	$ 11,935	$ 10,496