Consolidated Statements of Earnings - USD ($) shares in Thousands, $ in Millions		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenues:
Net earned premiums, principally supplemental health insurance		$ 15,263	$ 17,647	$ 18,622
Net investment income		3,656	3,818	3,638
Net investment gains (losses)		363	468	(270)
Other income (loss)		220	173	157
Total revenues		19,502	22,106	22,147
Benefits and expenses:
Benefits and claims, net		9,153	10,576	11,796
Acquisition and operating expenses:
Amortization of deferred policy acquisition costs		1,152	1,170	1,214
Insurance commissions		1,117	1,256	1,316
Insurance and other expenses	[1]	3,250	3,544	3,420
Interest expense		226	238	242
Total acquisition and operating expenses		5,745	6,208	6,192
Total benefits and expenses		14,898	16,784	17,988
Earnings before income taxes		4,604	5,322	4,159
Income Tax Expense:
Current		1,181	1,095	794
Deferred		(778)	(98)	(1,413)
Total income tax expense		403	997	(619)
Net earnings		$ 4,201	$ 4,325	$ 4,778
Net earnings per share:
Basic (in dollars per share)		$ 6.62	$ 6.42	$ 6.69
Diluted (in dollars per share)		$ 6.59	$ 6.39	$ 6.67
Weighted-average outstanding common shares used in computing earnings per share (In thousands):
Basic (in shares)		634,816	673,617	713,702
Diluted (in shares)		637,655	676,729	716,192
Cash dividends per share		$ 1.60	$ 1.32	$ 1.12

[1] Includes expense of $48 in 2021 and $15 in 2020 for the early extinguishment of debt.