Derivative Instruments And Hedging Activities (Gains And Losses On Derivatives Designated As Hedging Instruments) (Details) (Cash Flow Hedging [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Derivative [Line Items]
Amount of Gain/(Loss) Recognized in AOCI on Derivatives (Effective Portion)	$ (0.6)	$ (3.1)
Amount of Gain/(Loss) Reclassified from AOCI into Income (Effective Portion)	(3.2)	(3.8)
Amount of Gain/(Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing)
FX Options [Member] | Revenues [Member]
Derivative [Line Items]
Amount of Gain/(Loss) Recognized in AOCI on Derivatives (Effective Portion)
Amount of Gain/(Loss) Reclassified from AOCI into Income (Effective Portion)	(0.2)	(1.0)
Amount of Gain/(Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing)
Interest Rate Swaps [Member] | Interest Expense [Member]
Derivative [Line Items]
Amount of Gain/(Loss) Recognized in AOCI on Derivatives (Effective Portion)	(0.6)	(3.1)
Amount of Gain/(Loss) Reclassified from AOCI into Income (Effective Portion)	(3.0)	(2.8)
Amount of Gain/(Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing)