Derivative Financial Instruments and Fair Value Measurements (Details) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended											6 Months Ended
	Jun. 30, 2013 USD ($)	Jun. 30, 2012 USD ($)	Jun. 30, 2013 USD ($)	Jun. 30, 2012 USD ($)	Dec. 31, 2012 USD ($)	Jun. 30, 2013 Recurring Basis [Member] USD ($)	Dec. 31, 2012 Recurring Basis [Member] USD ($)	Jun. 30, 2013 Recurring Basis [Member] Fair Value Measurements Using Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] USD ($)	Dec. 31, 2012 Recurring Basis [Member] Fair Value Measurements Using Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] USD ($)	Jun. 30, 2013 Recurring Basis [Member] Fair Value Measurements Using Significant Other Observable Inputs (Level 2) [Member] USD ($)	Dec. 31, 2012 Recurring Basis [Member] Fair Value Measurements Using Significant Other Observable Inputs (Level 2) [Member] USD ($)	Jun. 30, 2013 Recurring Basis [Member] Fair Value Measurements Using Significant Unobservable Inputs (Level 3) [Member] USD ($)	Dec. 31, 2012 Recurring Basis [Member] Fair Value Measurements Using Significant Unobservable Inputs (Level 3) [Member] USD ($)	Jun. 30, 2013 Euro-denominated Note EUR350 [Member] USD ($)	Jun. 30, 2013 Euro-denominated Note EUR350 [Member] EUR (€)	Jun. 30, 2013 Carrying Value [Member] Euro-denominated Note EUR350 [Member] USD ($)	Dec. 31, 2012 Carrying Value [Member] Euro-denominated Note EUR350 [Member] USD ($)	Jun. 30, 2013 Fair Value [Member] Euro-denominated Note EUR350 [Member] Fair Value Measurements Using Significant Other Observable Inputs (Level 2) [Member] USD ($)	Dec. 31, 2012 Fair Value [Member] Euro-denominated Note EUR350 [Member] Fair Value Measurements Using Significant Other Observable Inputs (Level 2) [Member] USD ($)
Net investment hedges [Abstract]
Long-term Debt														$ 455.3	€ 350.0
Interest rate														4.50%	4.50%
Maturity date														Jun. 30, 2018	Jun. 30, 2018
Unrealized loss from economic hedges included in Accumulated Other Comprehensive Income, net of taxes	44.9		44.9		51.1
(Loss) gain associated with forward contracts included in Interest and Other Expenses	(0.1)	(0.3)	(0.3)	0.4
Assets [Abstract]
Foreign currency forward contracts							0.1		0		0.1		0
Deferred compensation plan assets						64.6	58.7	64.6	58.7	0	0	0	0
Total assets						64.6	58.8	64.6	58.7	0	0.1	0	0
Liabilities [Abstract]
Foreign currency forward contracts						0.1		0		0.1		0
Total Liabilities						0.1		0		0.1		0
Notes payable																$ 455.3	$ 725.5	$ 488.9	$ 778.8