Consolidated Statement of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net earnings, including noncontrolling interests	$ 219	$ 164	$ 1,640	$ 27
Net unrealized gains (losses) on securities:
Unrealized holding gains (losses) on securities arising during the period	(29)	194	(177)	350
Reclassification adjustment for realized (gains) losses included in net earnings	2	(12)	(16)	0
Reclassification adjustment for unrealized gains of subsidiaries sold	0	0	884	0
Total net unrealized gains (losses) on securities	(27)	182	(1,077)	350
Net unrealized gains (losses) on cash flow hedges:
Unrealized holding gains (losses) on cash flow hedges arising during the period	0	1	(1)	49
Reclassification adjustment for investment income included in net earnings	0	(7)	(11)	(25)
Reclassification adjustment for unrealized gains on cash flow hedges of subsidiaries sold	0	0	(29)	0
Total net unrealized gains (losses) on cash flow hedges	0	(6)	(41)	24
Foreign currency translation adjustments	(3)	0	(3)	(6)
Pension and other postretirement plans adjustments (“OPRP”):
Unrealized holding losses on pension and OPRP arising during the period	0	0	(1)	0
Reclassification adjustment for pension settlement loss included in net earnings	0	0	9	0
Total pension and OPRP adjustments	0	0	8	0
Other comprehensive income (loss), net of tax	(30)	176	(1,113)	368
Total comprehensive income, net of tax	189	340	527	395
Less: Comprehensive income (loss) attributable to noncontrolling interests	0	0	0	(11)
Comprehensive income attributable to shareholders	$ 189	$ 340	$ 527	$ 406