Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 1,572	$ 1,476	$ 2,770	$ 2,647
Other comprehensive income (loss), net of tax
Net unrealized appreciation (depreciation) on securities and derivatives	(410)	122	(970)	(151)
Net translation gains (losses) on foreign currencies	(206)	16	(269)	(103)
Postretirement benefits liability adjustment	27	15	40	33
Other comprehensive income (loss), net of tax	(589)	153	(1,199)	(221)
Total comprehensive income	983	1,629	1,571	2,426
Comprehensive income (loss) attributable to noncontrolling interests
Net income attributable to redeemable noncontrolling interests	2	3	5	8
Net income attributable to other noncontrolling interests	11	6	23	11
Other comprehensive loss attributable to redeemable noncontrolling interests	(1)	(1)	(3)	(5)
Total comprehensive income attributable to noncontrolling interests	12	8	25	14
SHAREHOLDERS' COMPREHENSIVE INCOME	$ 971	$ 1,621	$ 1,546	$ 2,412