Consolidated Statements of Earnings (USD $) In Millions, except Share data in Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Revenues:
Net premiums, principally supplemental health insurance	$ 4,888		$ 5,013		$ 9,742		$ 10,197
Net investment income	843		813		1,670		1,646
Realized investment gains (losses):
Other-than-temporary impairment losses realized	(28)	[1]	0	[1]	(31)	[1]	(55)	[1]
Sales and redemptions	97		86		138		205
Derivative and other gains (losses)	33		115		(51)		207
Total realized investment gains (losses)	102		201		56		357
Other income	5		17		10		52
Total revenues	5,838		6,044		11,478		12,252
Benefits and expenses:
Benefits and claims, net	3,293		3,411		6,513		6,932
Acquisition and operating expenses:
Amortization of deferred policy acquisition costs	276		251		570		534
Insurance commissions	369		378		735		770
Insurance expenses	537		529		1,071		1,063
Interest expense	81		69		161		140
Other operating expenses	44		48		86		94
Total acquisition and operating expenses	1,307		1,275		2,623		2,601
Total benefits and expenses	4,600		4,686		9,136		9,533
Earnings before income taxes	1,238		1,358		2,342		2,719
Income taxes	428		469		800		938
Net earnings	$ 810		$ 889		$ 1,542		$ 1,781
Net earnings per share:
Basic (in dollars per share)	$ 1.79		$ 1.91		$ 3.40		$ 3.82
Diluted (in dollars per share)	$ 1.78		$ 1.90		$ 3.38		$ 3.80
Weighted-average outstanding common shares used in computing earnings per share (In thousands):
Basic (in shares)	452,559		465,213		453,639		465,834
Diluted (in shares)	455,380		467,975		456,534		468,546
Cash dividends per share	$ 0.37		$ 0.35		$ 0.74		$ 0.70

[1] Includes $0 and $1 for the six-month periods ended June 30, 2014 and 2013, respectively, for impairments due to severity and duration of decline in fair value; and $28 and $0 for the three-month periods and $31 and $54 for the six-month periods ended June 30, 2014 and 2013, respectively, from change in intent to sell securities