Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Net earnings	$ 777	$ 845	$ 2,523	$ 2,395
Other comprehensive income (loss) before income taxes:
Unrealized foreign currency translation gains (losses) during period	(22)	(383)	393	(51)
Unrealized gains (losses) on fixed maturity securities:
Unrealized holding gains (losses) on fixed maturity securities during period	1,185	(866)	6,427	(3,099)
Reclassification adjustment for realized (gains) losses on fixed maturity securities included in net earnings	41	(37)	(1)	(11)
Unrealized gains (losses) on derivatives during period	(8)	(2)	(12)	2
Pension liability adjustment during period	1	1	5	1
Total other comprehensive income (loss) before income taxes	1,197	(1,287)	6,812	(3,158)
Income tax expense (benefit) related to items of other comprehensive income (loss)	310	(344)	1,712	(813)
Other comprehensive income (loss), net of income taxes	887	(943)	5,100	(2,345)
Total comprehensive income (loss)	$ 1,664	$ (98)	$ 7,623	$ 50