Consolidated Statement of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Comprehensive Income [Abstract]
Net earnings (loss), including noncontrolling interests	$ 419	$ (304)
Net unrealized losses on securities:
Unrealized holding losses on securities arising during the period	(281)	(865)
Reclassification adjustment for realized (gains) losses included in net earnings	(11)	19
Total net unrealized losses on securities	(292)	(846)
Net unrealized gains (losses) on cash flow hedges	(14)	27
Foreign currency translation adjustments	0	(10)
Other comprehensive loss, net of tax	(306)	(829)
Total comprehensive income (loss), net of tax	113	(1,133)
Less: Comprehensive income (loss) attributable to noncontrolling interests	0	(1)
Comprehensive income (loss) attributable to shareholders	$ 113	$ (1,132)