Consolidated Statement of Comprehensive Income (Unaudited) - 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, including noncontrolling interests	$ 164	$ 143	$ 27	$ 678
Net unrealized gains on securities:
Unrealized holding gains on securities arising during the period	194	107	350	847
Reclassification adjustment for realized (gains) losses included in net earnings	(12)	1	0	(10)
Total net unrealized gains on securities	182	108	350	837
Net unrealized gains (losses) on cash flow hedges	(6)	7	24	36
Foreign currency translation adjustments	0	(7)	(6)	(3)
Pension and other postretirement plans adjustments	0	1	0	1
Other comprehensive income, net of tax	176	109	368	871
Total comprehensive income, net of tax	340	252	395	1,549
Less: Comprehensive income (loss) attributable to noncontrolling interests	0	(3)	(11)	(6)
Comprehensive income attributable to shareholders	$ 340	$ 255	$ 406	$ 1,555