Consolidated Statements of Earnings - USD ($) shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Revenues:
Net premiums, principally supplemental health insurance	$ 4,638	$ 4,602
Net investment income	794	801
Realized investment gains (losses):
Other-than-temporary impairment losses realized	(10)	(14)
Sales and redemptions	(7)	91
Derivative and other gains (losses)	(123)	(47)
Total realized investment gains (losses)	(140)	30
Other income (loss)	17	18
Total revenues	5,309	5,451
Benefits and expenses:
Benefits and claims, net	3,052	3,025
Acquisition and operating expenses:
Amortization of deferred policy acquisition costs	294	292
Insurance commissions	328	333
Insurance expenses	614	563
Interest expense	62	65
Other expenses	61	56
Total acquisition and operating expenses	1,359	1,309
Total benefits and expenses	4,411	4,334
Earnings before income taxes	898	1,117
Income taxes	306	386
Net earnings	$ 592	$ 731
Net earnings per share:
Basic (in dollars per share)	$ 1.48	$ 1.75
Diluted (in dollars per share)	$ 1.47	$ 1.74
Weighted-average outstanding common shares used in computing earnings per share (In thousands):
Basic (in shares)	401,130	418,748
Diluted (in shares)	404,069	420,920
Cash dividends per share	$ 0.43	$ 0.41