Consolidated Statements of Earnings - USD ($) shares in Thousands, $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Revenues:
Net earned premiums, principally supplemental health insurance	[1]	$ 3,476	$ 3,535	$ 10,737	$ 11,379
Net investment income		1,004	920	2,946	2,760
Net investment gains (losses)		423	199	1,101	885
Other income (loss)		47	50	139	168
Total revenues		4,950	4,704	14,923	15,192
Benefits and expenses:
Benefits and claims, excluding reserve remeasurement		2,065	2,169	6,420	6,985
Reserve remeasurement (gains) losses		(205)	(93)	(312)	(152)
Total benefits and claims, net		1,860	2,076	6,108	6,833
Acquisition and operating expenses:
Amortization of deferred policy acquisition costs		201	194	608	598
Insurance commissions		250	267	797	846
Insurance and other expenses		785	779	2,290	2,413
Interest expense		49	59	148	171
Total acquisition and operating expenses		1,285	1,299	3,843	4,028
Total benefits and expenses		3,145	3,375	9,951	10,861
Earnings before income taxes		1,805	1,329	4,972	4,331
Income taxes		236	(452)	581	109
Net earnings		$ 1,569	$ 1,781	$ 4,391	$ 4,222
Net earnings per share:
Basic (in dollars per share)		$ 2.65	$ 2.83	$ 7.31	$ 6.60
Diluted (in dollars per share)		$ 2.64	$ 2.82	$ 7.28	$ 6.57
Weighted-average outstanding common shares used in computing earnings per share (In thousands):
Basic (in shares)		591,246	629,350	600,991	639,862
Diluted (in shares)		593,596	631,946	603,419	642,597
Cash dividends per share		$ 0.42	$ 0.40	$ 1.26	$ 1.20

[1] Includes a gain (loss) of $22 and $(41) for the three-month periods and $22 and $(42) for the nine-month periods ended September 30, 2023 and 2022, respectively, related to remeasurement of the deferred profit liability for limited-payment contracts.