Derivatives (Gains (Losses) Related To Derivatives Designated As Cash Flow Hedges) (Details) (Interest Rate Lock [Member], Cash Flow Hedging [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in OCI (Effective Portion)
Interest Expense-Net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Loss Reclassified from AOCI into Income (Effective Portion)	(0.6)	(0.6)	(1.1)
Loss On Debt Extinguishment [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Loss Recognized in Income (Ineffective Portion)	$ (0.5)		$ (2.7)