Condensed Consolidated Balance Sheets (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 4,019,405	$ 1,673,137
Investment securities	7,864,637	6,872,767
Receivables, less allowance for doubtful accounts of $85,015 in 2011 and $51,470 in 2010:	1,036,317	959,018
Securities lending invested collateral	5,486	49,636
Other current assets	706,493	583,141
Total current assets	13,632,338	10,137,699
Property and equipment, net	850,888	815,337
Long-term investment securities	1,695,943	1,499,672
Goodwill	2,579,916	2,567,809
Other long-term assets	1,140,644	1,082,736
Total assets	19,899,729	16,103,253
Current liabilities:
Benefits payable	3,868,428	3,469,306
Trade accounts payable and accrued expenses	2,332,638	1,624,832
Book overdraft	298,587	409,385
Securities lending payable	11,482	55,693
Unearned revenues	2,005,366	185,410
Total current liabilities	8,516,501	5,744,626
Long-term debt	1,661,552	1,668,849
Future policy benefits payable	1,580,585	1,492,855
Other long-term liabilities	283,121	272,867
Total liabilities	12,041,759	9,179,197
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; 192,804,649 shares issued at September 30, 2011 and 190,244,741 shares issued at December 31, 2010	32,133	31,707
Capital in excess of par value	1,913,665	1,737,207
Retained earnings	6,667,005	5,529,001
Accumulated other comprehensive income	279,844	120,584
Treasury stock, at cost, 29,300,843 shares at September 30, 2011 and 21,795,051 shares at December 31, 2010	(1,034,677)	(494,443)
Total stockholders' equity	7,857,970	6,924,056
Total liabilities and stockholders' equity	$ 19,899,729	$ 16,103,253