Deferred Policy Acquisition Costs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance, beginning of period	$ 20,058	$ 18,992	$ 17,661
Capitalization of commissions, sales and issue expenses	2,966	2,870	2,820
Amortization—Impact of assumption and experience unlocking and true-ups	(164)	(217)	247
Amortization—All other	(2,168)	(2,056)	(1,827)
Change in unrealized investment gains and losses	(713)	519	(190)
Foreign currency translation	(8)	(32)	281
Other	(59)	(18)	0
Balance, end of period	19,912	20,058	$ 18,992
Sale of the Company's subsidiary	(46)	(38)
Reclassification of ceded DAC to third party reinsurer	$ (14)
Impact of the elimination of Gibraltar Life's one-month reporting lag		$ 20