Consolidated Statement of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net earnings (loss), including noncontrolling interests	$ (304)	$ 326
Net unrealized gains (losses) on securities:
Unrealized holding gains (losses) on securities arising during the period	(865)	384
Reclassification adjustment for realized (gains) losses included in net earnings	19	(3)
Total net unrealized gains (losses) on securities	(846)	381
Net unrealized gains on cash flow hedges	27	11
Foreign currency translation adjustments	(10)	4
Other comprehensive income (loss), net of tax	(829)	396
Total comprehensive income (loss), net of tax	(1,133)	722
Less: Comprehensive income (loss) attributable to noncontrolling interests	(1)	(3)
Comprehensive income (loss) attributable to shareholders	$ (1,132)	$ 725