Consolidated Statements of Earnings - USD ($) shares in Thousands, $ in Millions		3 Months Ended			6 Months Ended
		Jun. 30, 2015		Jun. 30, 2014	Jun. 30, 2015		Jun. 30, 2014
Revenues:
Net premiums, principally supplemental health insurance		$ 4,364		$ 4,888	$ 8,796		$ 9,742
Net investment income		777		843	1,559		1,670
Realized investment gains (losses):
Other-than-temporary impairment losses realized	[1]	0		(28)	(6)		(31)
Sales and redemptions		92		97	160		138
Derivative and other gains (losses)		35		33	(14)		(51)
Total realized investment gains (losses)		127		102	140		56
Other income		19		5	18		10
Total revenues		5,287		5,838	10,513		11,478
Benefits and expenses:
Benefits and claims, net		2,937		3,293	5,889		6,513
Acquisition and operating expenses:
Amortization of deferred policy acquisition costs		255		276	532		570
Insurance commissions		325		369	655		735
Insurance expenses		550		537	1,080		1,071
Interest expense		74		81	157		161
Other expenses		272	[2]	44	313	[2]	86
Total acquisition and operating expenses		1,476		1,307	2,737		2,623
Total benefits and expenses		4,413		4,600	8,626		9,136
Earnings before income taxes		874		1,238	1,887		2,342
Income taxes		301		428	651		800
Net earnings		$ 573		$ 810	$ 1,236		$ 1,542
Net earnings per share:
Basic (in dollars per share)		$ 1.33		$ 1.79	$ 2.84		$ 3.40
Diluted (in dollars per share)		$ 1.32		$ 1.78	$ 2.83		$ 3.38
Weighted-average outstanding common shares used in computing earnings per share (In thousands):
Basic (in shares)		431,672		452,559	434,473		453,639
Diluted (in shares)		434,257		455,380	437,077		456,534
Cash dividends per share		$ 0.39		$ 0.37	$ 0.78		$ 0.74
8.50% senior notes due May 2019
Extinguishment of debt, make-whole premium		$ 230			$ 230

[1] Includes an immaterial amount and $28 for the three-month periods and $6 and $31 for the six-month periods ended June 30, 2015 and 2014, respectively, from change in intent to sell securities

[2] Includes expense of $230 for the make-whole payment associated with the early extinguishment of debt