Consolidated Statements of Earnings - USD ($) shares in Thousands, $ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenues:
Net earned premiums, principally supplemental health insurance	[1]	$ 14,123	$ 14,901	$ 17,095
Net investment income		3,811	3,656	3,818
Net investment gains (losses)		590	363	468
Other income (loss)		177	220	173
Total revenues		18,701	19,140	21,554
Benefits and expenses:
Benefits and claims, excluding reserve remeasurement		8,594	9,102	10,623
Reserve remeasurement (gains) losses		(383)	(215)	(147)
Total benefits and claims, net		8,211	8,887	10,476
Acquisition and operating expenses:
Amortization of deferred policy acquisition costs		816	792	835
Insurance commissions		1,052	1,117	1,256
Insurance and other expenses	[2]	3,165	3,249	3,541
Interest expense		195	226	238
Total acquisition and operating expenses		5,228	5,384	5,870
Total benefits and expenses		13,439	14,271	16,346
Earnings before income taxes		5,262	4,869	5,208
Income Tax Expense:
Current		1,663	1,181	1,095
Deferred		(1,060)	(730)	(118)
Income taxes		603	451	977
Net earnings		$ 4,659	$ 4,418	$ 4,231
Net earnings per share:
Basic (in dollars per share)		$ 7.81	$ 6.96	$ 6.28
Diluted (in dollars per share)		$ 7.78	$ 6.93	$ 6.25
Weighted-average outstanding common shares used in computing earnings per share (In thousands):
Basic (in shares)		596,173	634,816	673,617
Diluted (in shares)		598,745	637,655	676,729
Cash dividends per share		$ 1.68	$ 1.60	$ 1.32

[1] Includes a gain (loss) of $20, $(42) and $(11) in 2023, 2022 and 2021, respectively, related to remeasurement of the deferred profit liability for limited-payment contracts.

[2] Includes expense of $48 in 2021 for the early extinguishment of debt.