Consolidated Statements of Earnings (USD $) In Millions, except Share data in Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2012		Jun. 30, 2011
Revenues:
Premiums, principally supplemental health insurance	$ 5,467		$ 4,956		$ 10,845		$ 9,828
Net investment income	845		784		1,728		1,579
Realized investment gains (losses):
Other-than-temporary impairment losses realized	(343)	[1]	(528)	[2]	(546)	[1]	(933)	[2]
Sales and redemptions	(8)		(182)		70		(326)
Derivative and other gains (losses)	(67)		42		13		12
Total realized investment gains (losses)	(418)		(668)		(463)		(1,247)
Other income	8		16		32		44
Total revenues	5,902		5,088		12,142		10,204
Benefits and expenses:
Benefits and claims	3,763		3,310		7,409		6,532
Acquisition and operating expenses:
Amortization of deferred policy acquisition costs	269		251		557		511
Insurance commissions	432		427		867		849
Insurance expenses	587		565		1,150		1,098
Interest expense	62		46		119		92
Other operating expenses	48		45		97		86
Total acquisition and operating expenses	1,398		1,334		2,790		2,636
Total benefits and expenses	5,161		4,644		10,199		9,168
Earnings before income taxes	741		444		1,943		1,036
Income taxes	258		170		675		373
Net earnings	$ 483		$ 274		$ 1,268		$ 663
Net earnings per share:
Basic	$ 1.04		$ 0.59		$ 2.72		$ 1.42
Diluted	$ 1.03		$ 0.58		$ 2.71		$ 1.41
Weighted-average outstanding common shares used in computing earnings per share (In thousands):
Basic	466,788		466,498		466,337		467,317
Diluted	468,590		469,752		468,561		470,990
Cash dividends per share	$ 0.33		$ 0.30		$ 0.66		$ 0.60

[1] Includes $267 and $295 for the three- and six-month periods ended June 30, 2012, respectively, for credit-related impairments and $76 and $251 for the three- and six-month periods ended June 30, 2012, respectively, from change in intent to sell securities

[2] Consisted completely of credit-related impairments