Derivative Instruments And Hedging Activities (Fair Value Of Derivative Instruments) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Designated As Hedging Instrument [Member] | Interest Rate Swaps [Member]
Derivative [Line Items]
Derivatives Asset	$ 11.5
Derivatives Liability	4.5	12.2
Not Designated As Hedging Instrument [Member]
Derivative [Line Items]
Derivatives Asset	12.6	2.0
Derivatives Liability	6.8	12.9
Not Designated As Hedging Instrument [Member] | FX Forwards On Certain Assets And Liabilities [Member]
Derivative [Line Items]
Derivatives Asset	1.1	2.0
Derivatives Liability	$ 2.3	$ 0.7