Fair Value (Fair Value Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) (USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010
Available-for-sale securities	$ 1.9	$ 1.8
Total Assets	135.2	137.7
Fair Value Measured On Recurring Basis Liabilities	15.0	14.2
Level 1 [Member]
Available-for-sale securities	1.9	1.8
Total Assets	1.9	1.8
Fair Value Measured On Recurring Basis Liabilities	0	0
Level 1 [Member] | Interest-Rate Swap Agreements [Member]
Derivative Assets	0	0
Derivative Liabilities	0	0
Level 1 [Member] | Foreign Exchange Forward Contracts [Member]
Derivative Assets	0	0
Derivative Liabilities	0	0
Level 2 [Member]
Available-for-sale securities	0	0
Total Assets	133.3	135.9
Fair Value Measured On Recurring Basis Liabilities	15.0	14.2
Level 2 [Member] | Interest-Rate Swap Agreements [Member]
Derivative Assets	132.3	124.8
Derivative Liabilities	8.7	9.9
Level 2 [Member] | Foreign Exchange Forward Contracts [Member]
Derivative Assets	1.0	11.1
Derivative Liabilities	6.3	4.3
Interest-Rate Swap Agreements [Member]
Derivative Assets	132.3	124.8
Derivative Liabilities	8.7	9.9
Foreign Exchange Forward Contracts [Member]
Derivative Assets	1.0	11.1
Derivative Liabilities	$ 6.3	$ 4.3