Consolidated Statements of Earnings - USD ($) shares in Thousands, $ in Millions		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Revenues:
Net earned premiums, principally supplemental health insurance	[1]	$ 13,440	$ 14,123	$ 14,901
Net investment income		4,116	3,811	3,656
Net investment gains (losses)		1,271	590	363
Other income (loss)		100	177	220
Total revenues		18,927	18,701	19,140
Benefits and expenses:
Benefits and claims, excluding reserve remeasurement		8,008	8,594	9,102
Reserve remeasurement (gains) losses		(558)	(383)	(215)
Total benefits and claims, net		7,450	8,211	8,887
Acquisition and operating expenses:
Amortization of deferred policy acquisition costs		851	816	792
Insurance commissions		998	1,052	1,117
Insurance and other expenses		3,014	3,165	3,249
Interest expense		197	195	226
Total acquisition and operating expenses		5,060	5,228	5,384
Total benefits and expenses		12,510	13,439	14,271
Earnings before income taxes		6,417	5,262	4,869
Income tax expense (benefit):
Current		1,330	1,663	1,181
Deferred		(356)	(1,060)	(730)
Income taxes		974	603	451
Net earnings		$ 5,443	$ 4,659	$ 4,418
Impact on net earnings per share:
Basic (in dollars per share)		$ 9.68	$ 7.81	$ 6.96
Diluted (in dollars per share)		$ 9.63	$ 7.78	$ 6.93
Weighted-average outstanding common shares used in computing earnings per share (In thousands):
Basic (in shares)		562,492	596,173	634,816
Diluted (in shares)		565,015	598,745	637,655
Cash dividends per share		$ 2.00	$ 1.68	$ 1.60

[1] Includes a gain (loss) of $(81), $20 and $(42) in 2024, 2023 and 2022, respectively, related to remeasurement of the deferred profit liability for limited-payment contracts.