Consolidated Statements of Earnings - USD ($) shares in Thousands, $ in Millions		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenues:
Net earned premiums, principally supplemental health insurance		$ 17,647	$ 18,622	$ 18,780
Net investment income		3,818	3,638	3,578
Net investment gains (losses)		468	(270)	(135)
Other income (loss)		173	157	84
Total revenues		22,106	22,147	22,307
Benefits and expenses:
Benefits and claims, net		10,576	11,796	11,942
Acquisition and operating expenses:
Amortization of deferred policy acquisition costs		1,170	1,214	1,282
Insurance commissions		1,256	1,316	1,321
Insurance and other expenses	[1]	3,544	3,420	3,089
Interest expense		238	242	228
Total acquisition and operating expenses		6,208	6,192	5,920
Total benefits and expenses		16,784	17,988	17,862
Earnings before income taxes		5,322	4,159	4,445
Income Tax Expense:
Current		1,095	794	806
Deferred		(98)	(1,413)	335
Total income tax expense		997	(619)	1,141
Net earnings		$ 4,325	$ 4,778	$ 3,304
Net earnings per share:
Basic (in dollars per share)		$ 6.42	$ 6.69	$ 4.45
Diluted (in dollars per share)		$ 6.39	$ 6.67	$ 4.43
Weighted-average outstanding common shares used in computing earnings per share (In thousands):
Basic (in shares)		673,617	713,702	742,414
Diluted (in shares)		676,729	716,192	746,430
Cash dividends per share		$ 1.32	$ 1.12	$ 1.08

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