Consolidated Statements of Earnings - USD ($) shares in Thousands, $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Revenues:
Net earned premiums, principally supplemental health insurance	[1]	$ 3,470	$ 3,325	$ 6,851	$ 6,781
Net investment income		1,081	1,095	2,036	2,095
Net investment gains (losses)		(421)	696	(1,384)	1,647
Other income (loss)		30	22	55	52
Total revenues		4,160	5,138	7,558	10,575
Benefits and expenses:
Benefits and claims, excluding reserve remeasurement		2,047	1,972	4,033	4,039
Reserve remeasurement (gains) losses		(37)	(51)	(78)	(107)
Total benefits and claims, net		2,010	1,921	3,955	3,932
Acquisition and operating expenses:
Amortization of deferred policy acquisition costs		221	208	437	424
Insurance commissions		251	246	491	501
Insurance and other expenses		804	694	1,606	1,431
Interest expense		52	50	102	97
Total acquisition and operating expenses		1,328	1,198	2,636	2,453
Total benefits and expenses		3,338	3,119	6,591	6,385
Earnings before income taxes		822	2,019	967	4,190
Income taxes		223	264	339	556
Net earnings		$ 599	$ 1,755	$ 628	$ 3,634
Net earnings per share:
Basic (in dollars per share)		$ 1.12	$ 3.11	$ 1.16	$ 6.38
Diluted (in dollars per share)		$ 1.11	$ 3.10	$ 1.16	$ 6.35
Weighted-average outstanding common shares used in computing earnings per share (In thousands):
Basic (in shares)		536,688	564,573	540,676	569,730
Diluted (in shares)		538,425	566,838	542,629	572,160
Cash dividends per share		$ 0.58	$ 0.50	$ 1.16	$ 1.00

[1] Includes a gain (loss) of an immaterial amount and $(2) for the three-month periods and an immaterial amount and $(5) for the six-month periods ended June 30, 2025 and 2024, respectively, related to remeasurement of the deferred profit liability for limited-payment contracts.