Derivative Instruments and Hedging Activities (Tables)

3 Months Ended

Mar. 31, 2012

Derivative Instruments And Hedging Activities [Abstract]

Fair value of derivative instruments in the Balance Sheet

Liability Derivatives	Balance Sheet Location	Fair Value as of
		March 31, 2012			December 31, 2011
Derivatives designated as hedging instruments:
Interest rate swaps	Other long-term liabilities	$	(8.7	)	$	(9.0	)

Summary of Cash Flow Hedges

Derivatives in Cash Flow Hedging Relationships	Amount of Gain or (Loss) Recognized in Other (Effective Portion)
	Three Months Ended March 31,
	2012		2011
Interest rate swaps, net of tax	$	0.2	$	0.5

Changes in fair value of foreign exchange contracts

Derivatives Not Designated as Hedging Instruments	Location of  Gain or (Loss) Recognized in Income on Derivatives	Amount of Gain or (Loss) Recognized in Income on Derivatives
		Three Months Ended March 31,
		2012			2011
Foreign currency exchange contracts	Other, net	$	(0.4	)	$	(1.1	)