Consolidated Statements of Earnings - USD ($) shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenues:
Net premiums, principally supplemental health insurance	$ 4,691	$ 4,745
Net investment income	878	837
Realized investment gains (losses):
Other-than-temporary impairment losses realized	(2)	(7)
Other gains (losses)	73	(127)
Total realized investment gains (losses)	71	(134)
Other income (loss)	17	16
Total revenues	5,657	5,464
Benefits and expenses:
Benefits and claims, net	2,967	3,042
Acquisition and operating expenses:
Amortization of deferred policy acquisition costs	340	314
Insurance commissions	331	337
Insurance and other expenses	719	733
Interest expense	58	56
Total acquisition and operating expenses	1,448	1,440
Total benefits and expenses	4,415	4,482
Earnings before income taxes	1,242	982
Income taxes	314	265
Net earnings	$ 928	$ 717
Net earnings per share:
Basic (in dollars per share)	$ 1.23	$ 0.92
Diluted (in dollars per share)	$ 1.23	$ 0.91
Weighted-average outstanding common shares used in computing earnings per share (In thousands):
Basic (in shares)	751,423	778,550
Diluted (in shares)	755,790	783,852
Cash dividends per share	$ 0.27	$ 0.26