Consolidated Statements of Earnings - USD ($) shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues:
Net premiums, principally supplemental health insurance	$ 18,780	$ 18,677	$ 18,531
Net investment income	3,578	3,442	3,220
Realized investment gains (losses):
Other-than-temporary impairment losses realized and loan loss reserves	(31)	(81)	(37)
Other gains (losses)	(104)	(349)	(114)
Total realized investment gains (losses)	(135)	(430)	(151)
Other income (loss)	84	69	67
Total revenues	22,307	21,758	21,667
Benefits and expenses:
Benefits and claims, net	11,942	12,000	12,181
Acquisition and operating expenses:
Amortization of deferred policy acquisition costs	1,282	1,245	1,132
Insurance commissions	1,321	1,320	1,316
Insurance and other expenses	3,089	2,988	2,780	[1]
Interest expense	228	222	240
Total acquisition and operating expenses	5,920	5,775	5,468
Total benefits and expenses	17,862	17,775	17,649
Earnings before income taxes	4,445	3,983	4,018
Income Tax Expense:
Current	806	1,379	631
Deferred	335	(316)	(1,217)
Total income tax expense	1,141	1,063	(586)
Net earnings	$ 3,304	$ 2,920	$ 4,604
Net earnings per share:
Basic (in dollars per share)	$ 4.45	$ 3.79	$ 5.81
Diluted (in dollars per share)	$ 4.43	$ 3.77	$ 5.77
Weighted-average outstanding common shares used in computing earnings per share (In thousands):
Basic (in shares)	742,414	769,588	792,042
Diluted (in shares)	746,430	774,650	797,861
5.50% subordinated notes due September 2052
Expense on extinguishment of debt			$ 13

[1] Includes expense of $13 in 2017 for the early extinguishment of debt