Consolidated Statements of Earnings (USD $) In Millions, except Share data in Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Revenues:
Net premiums, principally supplemental health insurance	$ 4,432		$ 4,854
Net investment income	782		827
Realized investment gains (losses):
Other-than-temporary impairment losses realized	(6)	[1]	(3)	[1]
Sales and redemptions	68		41
Derivative and other gains (losses)	(49)		(84)
Total realized investment gains (losses)	13		(46)
Other income	(1)		5
Total revenues	5,226		5,640
Benefits and expenses:
Benefits and claims, net	2,952		3,220
Acquisition and operating expenses:
Amortization of deferred policy acquisition costs	277		294
Insurance commissions	330		366
Insurance expenses	530		534
Interest expense	83		80
Other operating expenses	41		42
Total acquisition and operating expenses	1,261		1,316
Total benefits and expenses	4,213		4,536
Earnings before income taxes	1,013		1,104
Income taxes	350		372
Net earnings	$ 663		$ 732
Net earnings per share:
Basic (in dollars per share)	$ 1.52		$ 1.61
Diluted (in dollars per share)	$ 1.51		$ 1.60
Weighted-average outstanding common shares used in computing earnings per share (In thousands):
Basic (in shares)	437,306		454,731
Diluted (in shares)	439,927		457,699
Cash dividends per share	$ 0.39		$ 0.37

[1] Includes $6 and $3 for the three-month periods ended March 31, 2015 and 2014, respectively, from change in intent to sell securities