Derivatives and Hedging Activities (Details 1) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Effect of derivative instruments on condensed consolidated statement of operations
Derivative Instruments, Gain (Loss) Recognized in Income, Net, Total	$ (2.6)	$ (3.0)	$ (5.3)	$ 3.0
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Effect of derivative instruments on condensed consolidated statement of operations
Derivative Instruments, Gain (Loss) Recognized in Income, Net, Total	0.3	1.4	0.4	2.3
Designated as Hedging Instrument [Member] | Foreign Exchange Forward [Member]
Effect of derivative instruments on condensed consolidated statement of operations
Derivative Instruments, Gain (Loss) Recognized in Income, Net, Total	0.1	0.1	(0.1)	0.1
Not Designated as Hedging Instrument [Member] | Foreign Exchange Forward [Member]
Effect of derivative instruments on condensed consolidated statement of operations
Derivative Instruments, Gain (Loss) Recognized in Income, Net, Total	$ (3.0)	$ (4.5)	$ (5.6)	$ 0.6