CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 3,869	$ 1,377
Investment securities	7,882	7,743
Receivables, less allowance for doubtful accounts of $89 in 2012 and $85 in 2011:	898	1,034
Other current assets	1,422	1,027
Total current assets	14,071	11,181
Property and equipment, net	976	912
Long-term investment securities	1,783	1,710
Goodwill	2,792	2,740
Other long-term assets	1,233	1,165
Total assets	20,855	17,708
Current liabilities:
Benefits payable	3,994	3,754
Trade accounts payable and accrued expenses	2,081	1,783
Book overdraft	260	306
Unearned revenues	2,341	213
Total current liabilities	8,676	6,056
Long-term debt	1,618	1,659
Future policy benefits payable	1,785	1,663
Other long-term liabilities	321	267
Total liabilities	12,400	9,645
Commitments and contingencies
Stockholders' equity:
Preferred stock, $1 par; 10,000,000 shares authorized; none issued	0	0
Common stock, $0.16 2/3 par; 300,000,000 shares authorized; 194,250,130 shares issued at June 30, 2012 and 193,230,310 shares issued at December 31, 2011	32	32
Capital in excess of par value	2,063	1,938
Retained earnings	7,346	6,825
Accumulated other comprehensive income	327	303
Treasury stock, at cost, 32,537,691shares at June 30, 2012 and 29,225,996 shares at December 31, 2011	(1,313)	(1,035)
Total stockholders' equity	8,455	8,063
Total liabilities and stockholders' equity	$ 20,855	$ 17,708