Consolidated Statements of Shareholders' Equity - USD ($) $ in Millions		Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
Balance, beginning of period at Dec. 31, 2022		$ 20,140	$ 135	$ 2,641	$ 44,367	$ (6,429)	$ (20,574)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings		4,659	0	0	4,659	0	0
Unrealized foreign currency translation gains (losses) during period, net of income taxes		(505)	0	0	0	(505)	0
Unrealized gains (losses) on fixed maturity securities during period, net of income taxes and reclassification adjustments		1,841	0	0	0	1,841	0
Unrealized gains (losses) on derivatives during period, net of income taxes		5	0	0	0	5	0
Effect of changes in discount rate assumptions during period, net of income taxes		(460)	0	0	0	(460)	0
Pension liability adjustment during period, net of income taxes		28	0	0	0	28	0
Dividends to shareholders	[1]	(1,033)	0	0	(1,033)	0	0
Exercise of stock options		13	0	13	0	0	0
Share-based compensation		75	1	74	0	0	0
Purchases of treasury stock		(2,854)	0	0	0	0	(2,854)
Treasury stock reissued		76	0	43	0	0	33
Balance, end of period at Dec. 31, 2023		21,985	136	2,771	47,993	(5,520)	(23,395)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings		5,443	0	0	5,443	0	0
Unrealized foreign currency translation gains (losses) during period, net of income taxes		(929)	0	0	0	(929)	0
Unrealized gains (losses) on fixed maturity securities during period, net of income taxes and reclassification adjustments		(1,115)	0	0	0	(1,115)	0
Unrealized gains (losses) on derivatives during period, net of income taxes		2	0	0	0	2	0
Effect of changes in discount rate assumptions during period, net of income taxes		4,566	0	0	0	4,566	0
Pension liability adjustment during period, net of income taxes		18	0	0	0	18	0
Dividends to shareholders	[1]	(1,159)	0	0	(1,159)	0	0
Exercise of stock options		9	0	9	0	0	0
Share-based compensation		65	0	65	0	0	0
Purchases of treasury stock		(2,868)	0	0	0	0	(2,868)
Treasury stock reissued		81	0	49	0	0	32
Balance, end of period at Dec. 31, 2024		26,098	136	2,894	52,277	(2,978)	(26,231)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings		3,646	0	0	3,646	0	0
Unrealized foreign currency translation gains (losses) during period, net of income taxes		151	0	0	0	151	0
Unrealized gains (losses) on fixed maturity securities during period, net of income taxes and reclassification adjustments		(1,833)	0	0	0	(1,833)	0
Unrealized gains (losses) on derivatives during period, net of income taxes		7	0	0	0	7	0
Effect of changes in discount rate assumptions during period, net of income taxes		6,029	0	0	0	6,029	0
Pension liability adjustment during period, net of income taxes		76	0	0	0	76	0
Dividends to shareholders	[1]	(1,241)	0	0	(1,241)	0	0
Exercise of stock options		7	0	7	0	0	0
Share-based compensation		76	0	76	0	0	0
Purchases of treasury stock		(3,606)	0	0	0	0	(3,606)
Treasury stock reissued		80	0	47	0	0	33
Balance, end of period at Dec. 31, 2025		$ 29,490	$ 136	$ 3,024	$ 54,682	$ 1,452	$ (29,804)

[1] Dividends to shareholders are recorded in the period in which they are declared.