Consolidated Statements of Earnings (USD $) In Millions, except Share data in Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Revenues:
Net Premiums, principally supplemental health insurance	$ 20,135		$ 22,148		$ 20,362
Net investment income	3,293		3,473		3,280
Realized investment gains (losses):
Other-than-temporary impairment losses realized	(199)	[1]	(977)	[1]	(1,901)	[1]
Sales and redemptions	262		474		594
Derivative and other gains (losses)	336		154		(245)
Total realized investment gains (losses)	399		(349)		(1,552)
Other income	112		92		81
Total revenues	23,939		25,364		22,171
Benefits and expenses:
Benefits and claims, net	13,813		15,330		13,749
Acquisition and operating expenses:
Amortization of deferred policy acquisition costs	1,074		1,117		1,033
Insurance commissions	1,528		1,744		1,725
Insurance expenses	2,222		2,415		2,336
Interest expense	293		261		196
Other operating expenses	193		195		182
Total acquisition and operating expenses	5,310		5,732		5,472
Total benefits and expenses	19,123		21,062		19,221
Earnings before income taxes	4,816		4,302		2,950
Income Tax Expense:
Current	1,236		816		891
Deferred	422		620		122
Total income tax expense	1,658		1,436		1,013
Net earnings	$ 3,158		$ 2,866		$ 1,937
Net earnings per share:
Basic (in dollars per share)	$ 6.80		$ 6.14		$ 4.16
Diluted (in dollars per share)	$ 6.76		$ 6.11		$ 4.12
Weighted-average outstanding common shares used in computing earnings per share (In thousands):
Basic (in shares)	464,502		466,868		466,519
Diluted (in shares)	467,408		469,287		469,370

[1] Includes $45, $597 and $1,286 for the years ended December 31, 2013, 2012 and 2011, respectively, for credit-related impairments; $26 and $27 for the years ended December 31, 2013 and 2012, respectively, for impairments due to severity and duration of decline in fair value; and $128, $353 and $615 for the years ended December 31, 2013, 2012 and 2011, respectively, from change in intent to sell securities