Consolidated Statements of Earnings - USD ($) shares in Thousands, $ in Millions		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Revenues:
Net premiums, principally supplemental health insurance		$ 4,602	$ 4,432
Net investment income		801	782
Realized investment gains (losses):
Other-than-temporary impairment losses realized	[1]	(14)	(6)
Sales and redemptions		91	68
Derivative and other gains (losses)		(4)	(49)
Total realized investment gains (losses)		73	13
Other income (loss)		(25)	(1)
Total revenues		5,451	5,226
Benefits and expenses:
Benefits and claims, net		3,025	2,952
Acquisition and operating expenses:
Amortization of deferred policy acquisition costs		292	277
Insurance commissions		333	330
Insurance expenses		563	530
Interest expense		65	83
Other expenses		56	41
Total acquisition and operating expenses		1,309	1,261
Total benefits and expenses		4,334	4,213
Earnings before income taxes		1,117	1,013
Income taxes		386	350
Net earnings		$ 731	$ 663
Net earnings per share:
Basic (in dollars per share)		$ 1.75	$ 1.52
Diluted (in dollars per share)		$ 1.74	$ 1.51
Weighted-average outstanding common shares used in computing earnings per share (In thousands):
Basic (in shares)		418,748	437,306
Diluted (in shares)		420,920	439,927
Cash dividends per share		$ 0.41	$ 0.39

[1] Includes $14 and $6 for the three-month periods ended March 31, 2016 and 2015, respectively, from change in intent to sell securities