Consolidated Statements of Earnings (USD $) In Millions, except Share data in Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Revenues:
Net premiums, principally supplemental health insurance	$ 4,841		$ 5,028		$ 14,583		$ 15,225
Net investment income	841		821		2,511		2,467
Realized investment gains (losses):
Other-than-temporary impairment losses realized	0	[1]	(10)	[1]	(31)	[1]	(65)	[1]
Sales and redemptions	33		72		171		277
Derivative and other gains (losses)	(17)		(40)		(68)		167
Total realized investment gains (losses)	16		22		72		379
Other income	38		15		48		67
Total revenues	5,736		5,886		17,214		18,138
Benefits and expenses:
Benefits and claims, net	3,355		3,485		9,868		10,417
Acquisition and operating expenses:
Amortization of deferred policy acquisition costs	271		256		841		790
Insurance commissions	361		388		1,096		1,158
Insurance expenses	566		568		1,637		1,631
Interest expense	77		71		238		211
Other operating expenses	32		49		118		143
Total acquisition and operating expenses	1,307		1,332		3,930		3,933
Total benefits and expenses	4,662		4,817		13,798		14,350
Earnings before income taxes	1,074		1,069		3,416		3,788
Income taxes	368		367		1,168		1,305
Net earnings	$ 706		$ 702		$ 2,248		$ 2,483
Net earnings per share:
Basic (in dollars per share)	$ 1.56		$ 1.51		$ 4.96		$ 5.34
Diluted (in dollars per share)	$ 1.56		$ 1.50		$ 4.93		$ 5.31
Weighted-average outstanding common shares used in computing earnings per share (In thousands):
Basic (in shares)	451,246		464,324		452,833		465,325
Diluted (in shares)	453,981		467,391		455,674		468,052
Cash dividends per share	$ 0.37		$ 0.35		$ 1.11		$ 1.05

[1] Includes $0 and $1 for the nine-month periods ended September 30, 2014 and 2013, respectively, for impairments due to severity and duration of decline in fair value; $0 and $10 for the three-month periods and $31 and $64 for the nine-month periods ended September 30, 2014 and 2013, respectively, from change in intent to sell securities