Consolidated Statement of Cash Flows (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Cash flows from operating activities:
Net income	$ 1,275.8	$ 1,181.2	$ 827.6
Net loss (income) from discontinued operations, net of tax	0	23.4	(1.0)
Net income from continuing operations	1,275.8	1,204.6	826.6
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	253.4	244.7	106.7
Deferred income taxes	137.8	110.4	51.5
Employee stock-based compensation expense	48.8	49.7	44.6
Bad debt expense	11.6	5.2	24.1
Deferred financing fees	81.0	5.1	66.3
Other, net	4.5	9.4	3.3
Changes in operating assets and liabilities, net of changes resulting from acquisitions:
Receivables	(206.1)	793.0	(506.0)
Inventories	8.0	(70.2)	(58.1)
Other current and noncurrent assets	119.2	(90.0)	(68.6)
Claims and rebates payable	207.5	(186.7)	995.4
Other current and noncurrent liabilities	250.5	29.9	266.2
Net cash provided by operating activities - continuing operations	2,192.0	2,105.1	1,752.0
Net cash provided by operating activities - discontinued operations		12.3	19.5
Net cash flows provided by operating activities	2,192.0	2,117.4	1,771.5
Cash flows from investing activities:
Purchases of property and equipment	(144.4)	(119.9)	(147.5)
Purchase of short-term investments	(25.0)	(38.0)	(1,201.4)
Proceeds from sale of short-term investments	45.0	8.6	6.4
Proceeds from the sale of business		2.5
Acquisitions, net of cash acquired			(4,672.6)
Sale of short-term investments			1,198.9
Other	0.5	1.7	(4.3)
Net cash used in investing activities - continuing operations	(123.9)	(145.1)	(4,820.5)
Net cash used in investing activities - discontinued operations		(0.8)	(1.9)
Net cash used in investing activities	(123.9)	(145.9)	(4,822.4)
Cash flows from financing activities:
Proceeds from long-term debt, net of discounts	5,580.3		2,491.6
Treasury stock acquired	(2,515.7)	(1,276.2)
Deferred financing fees	(91.6)	(3.9)	(79.5)
Net proceeds from employee stock plans	32.2	35.3	12.5
Tax benefit relating to employee stock-based compensation	28.3	58.9	13.4
Repayment of long-term debt	(0.1)	(1,340.1)	(420.1)
Net proceeds from stock issuance			1,569.1
Other	(2.9)	3.0
Net cash provided by (used in) financing activities	3,030.5	(2,523.0)	3,587.0
Effect of foreign currency translation adjustment	(2.2)	4.8	3.6
Net increase (decrease) in cash and cash equivalents	5,096.4	(546.7)	539.7
Cash and cash equivalents at beginning of year	523.7	1,070.4	530.7
Cash and cash equivalents at end of year	5,620.1	523.7	1,070.4
Cash paid during the year for:
Income tax payments, net of refunds	487.3	601.4	478.3
Interest	$ 181.6	$ 162.3	$ 185.8