Consolidated Statement of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net earnings (loss), including noncontrolling interests	$ 167	$ 209	$ (137)	$ 535
Net unrealized gains (losses) on securities:
Unrealized holding gains on securities arising during the period	1,021	356	156	740
Reclassification adjustment for realized (gains) losses included in net earnings	(7)	(8)	12	(11)
Total net unrealized gains on securities	1,014	348	168	729
Net unrealized gains on cash flow hedges	3	18	30	29
Foreign currency translation adjustments	4	0	(6)	4
Other comprehensive income, net of tax	1,021	366	192	762
Total comprehensive income, net of tax	1,188	575	55	1,297
Less: Comprehensive income (loss) attributable to noncontrolling interests	(10)	0	(11)	(3)
Comprehensive income attributable to shareholders	$ 1,198	$ 575	$ 66	$ 1,300