Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 1,613	$ 1,502	$ 5,058	$ 4,970
Other comprehensive (loss) income, net of tax:
Change in net unrealized losses/gains on investments	(639)	(97)	(2,630)	(284)
Change in non-credit component of impairment losses on investments	(1)	(1)	(3)	1
Change in net unrealized gains/losses on cash flow hedges	2	4	8	10
Change in net periodic pension and postretirement costs	7	8	23	26
Foreign currency translation adjustments	(7)	(1)	(15)	(7)
Other comprehensive loss	(638)	(87)	(2,617)	(254)
Net loss (income) attributable to noncontrolling interests	5	7	18	(3)
Other comprehensive loss attributable to noncontrolling interests	3	1	11	1
Total shareholders’ comprehensive income	$ 983	$ 1,423	$ 2,470	$ 4,714