Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Net earnings	$ 817	$ 832	$ 1,745	$ 1,550
Other comprehensive income (loss) before income taxes:
Unrealized foreign currency translation gains (losses) during period	417	(493)	416	332
Unrealized gains (losses) on fixed maturity securities:
Unrealized holding gains (losses) on fixed maturity securities during period	2,046	(506)	5,242	(2,233)
Reclassification adjustment for realized (gains) losses on fixed maturity securities included in net earnings	(25)	28	(43)	26
Unrealized gains (losses) on derivatives during period	(1)	(2)	(4)	4
Pension liability adjustment during period	(2)	2	5	0
Total other comprehensive income (loss) before income taxes	2,435	(971)	5,616	(1,871)
Income tax expense (benefit) related to items of other comprehensive income (loss)	552	(138)	1,403	(469)
Other comprehensive income (loss), net of income taxes	1,883	(833)	4,213	(1,402)
Total comprehensive income (loss)	$ 2,700	$ (1)	$ 5,958	$ 148