CONSOLIDATED BALANCE SHEETS (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 1,495.6	$ 2,090.4
Marketable securities available for sale	2,024.9	1,809.9
Accounts receivable, net of allowances of $36.6 and $33.0 at March 31, 2013 and December 31, 2012, respectively	1,028.7	960.5
Inventory	275.4	259.5
Deferred income taxes	92.3	93.2
Other current assets	385.0	320.2
Total current assets	5,301.9	5,533.7
Property, plant and equipment, net	578.2	578.4
Intangible assets, net	3,034.1	3,100.4
Goodwill	2,042.3	2,042.8
Other assets	496.1	479.0
Total assets	11,452.6	11,734.3
Current liabilities:
Short-term borrowings	362.0	308.5
Accounts payable	116.8	145.6
Accrued expenses	675.2	775.7
Income taxes payable	12.1	11.8
Current portion of deferred revenue	16.5	17.3
Other current liabilities	391.6	431.3
Total current liabilities	1,574.2	1,690.2
Deferred revenue, net of current portion	17.0	16.2
Income taxes payable	194.7	188.2
Deferred income taxes	968.8	1,018.4
Other non-current liabilities	379.4	355.5
Long-term debt, net of discount	2,764.1	2,771.3
Total liabilities	5,898.2	6,039.8
Commitments and Contingencies (Note 15)
Stockholders' Equity:
Preferred stock, $.01 par value per share, 5.0 million shares authorized; none outstanding at March 31, 2013 and December 31, 2012, respectively
Common stock, $.01 par value per share, 575.0 million shares authorized; issued 504.0 million and 498.4 million shares at March 31, 2013 and December 31, 2012, respectively	5.0	5.0
Common stock in treasury, at cost; 85.9 million and 78.7 million shares at March 31, 2013 and December 31, 2012, respectively	(5,528.7)	(4,823.2)
Additional paid-in capital	7,648.6	7,539.8
Retained earnings	3,407.5	3,022.6
Accumulated other comprehensive income (loss)	22.0	(49.7)
Total stockholders' equity	5,554.4	5,694.5
Total liabilities and stockholders' equity	$ 11,452.6	$ 11,734.3