Accounts Payable and Accrued Expenses (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Accounts Payable and Accrued Liabilities, Current [Line Items]
Trade accounts payable and accrued purchases	$ 197.9	$ 259.6
Accrued rebate - Medicaid	442.1	409.8
Accrued rebate - Managed care	228.1	202.8
Sales return reserve	86.1	88.8
Accrued bonuses	56.3	103.0
Accrued employee compensation and benefits payable	95.2	59.3
R&D accruals	53.6	52.7
Marketing accruals	20.0	18.2
Other accrued expenses	216.9	176.3
Accounts payable and accrued expenses, total	$ 1,396.2	$ 1,370.5