Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net earnings	$ 2,456	$ 777	$ 3,826	$ 2,523
Other comprehensive income (loss) before income taxes:
Unrealized foreign currency translation gains (losses) during period	172	(22)	329	393
Unrealized gains (losses) on fixed maturity securities:
Unrealized holding gains (losses) on fixed maturity securities during period	1,420	1,185	26	6,427
Reclassification adjustment for (gains) losses on fixed maturity securities included in net earnings	(13)	41	132	(1)
Unrealized gains (losses) on derivatives during period	2	(8)	(3)	(12)
Pension liability adjustment during period	(1)	1	(1)	5
Total other comprehensive income (loss) before income taxes	1,580	1,197	483	6,812
Income tax expense (benefit) related to items of other comprehensive income (loss)	413	310	29	1,712
Other comprehensive income (loss), net of income taxes	1,167	887	454	5,100
Total comprehensive income (loss)	$ 3,623	$ 1,664	$ 4,280	$ 7,623