Consolidated Statement of Cash Flows (Unaudited) (USD $) In Millions	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Cash flows from operating activities:
Net income	$ 660.7	$ 550.1
Net loss from discontinued operations, net of tax	0	17.8
Net income from continuing operations	660.7	567.9
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	126.2	119.2
Non-cash adjustments to net income	126.8	78.0
Changes in operating assets and liabilities:
Accounts receivable	(223.6)	822.1
Claims and rebates payable	(135.6)	(255.7)
Other net changes in operating assets and liabilities	148.6	104.9
Net cash provided by operating activities - continuing operations	703.1	1,436.4
Net cash provided by operating activities - discontinued operations		12.4
Net cash flows provided by operating activities	703.1	1,448.8
Cash flows from investing activities:
Purchases of property and equipment	(54.1)	(51.1)
Other	2.4	2.7
Net cash used in investing activities - continuing operations	(51.7)	(48.4)
Net cash used in investing activities - discontinued operations		(0.8)
Net cash used in investing activities	(51.7)	(49.2)
Cash flows from financing activities:
Treasury stock acquired	(2,515.7)	(528.7)
Proceeds from long-term debt, net of discounts	1,494.0
Proceeds from revolving credit line, net	100.0
Tax benefit relating to employee stock compensation	25.9	30.8
Net proceeds from employee stock plans	23.1	16.7
Deferred financing fees	(10.9)
Repayment of long-term debt	(0.1)	(360.0)
Net cash (used in) provided by financing activities	(883.7)	(841.2)
Effect of foreign currency translation adjustment	(0.4)	2.4
Net (decrease) increase in cash and cash equivalents	(232.7)	560.8
Cash and cash equivalents at beginning of period	523.7	1,070.4
Cash and cash equivalents at end of period	$ 291.0	$ 1,631.2