Financial Instruments (Schedule Of Location And Amounts Of Gains And Losses On The Derivative Instrument Designated As A Fair Value Hedge) (Detail) (Interest Expense, USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Interest Rate Swap Contract
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) Recognized on Swap and Long-Term Debt	$ 1.6	$ 5.7	$ 1.5	$ 4.0
Long-term Debt
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) Recognized on Swap and Long-Term Debt	$ (1.6)	$ (5.7)	$ (1.5)	$ (4.0)