Consolidated Statements of Earnings (USD $) In Millions, except Share data in Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Revenues:
Premiums, principally supplemental health insurance	$ 5,184	$ 5,378
Net investment income	833	882
Realized investment gains (losses):
Other-than-temporary impairment losses realized	(55)	(203)
Sales and redemptions	119	78
Derivative and other gains (losses)	92	80
Total realized investment gains (losses)	156	(45)
Other income	35	25
Total revenues	6,208	6,240
Benefits and expenses:
Benefits and claims	3,521	3,646
Acquisition and operating expenses:
Amortization of deferred policy acquisition costs	283	287
Insurance commissions	392	435
Insurance expenses	534	564
Interest expense	71	57
Other operating expenses	46	49
Total acquisition and operating expenses	1,326	1,392
Total benefits and expenses	4,847	5,038
Earnings before income taxes	1,361	1,202
Income taxes	469	417
Net earnings	$ 892	$ 785
Net earnings per share:
Basic	$ 1.91	$ 1.68
Diluted	$ 1.90	$ 1.68
Weighted-average outstanding common shares used in computing earnings per share (In thousands):
Basic	466,462	465,887
Diluted	469,124	468,533
Cash dividends per share	$ 0.35	$ 0.33