Derivative Financial Instruments and Fair Value Measurements (Details) In Millions, unless otherwise specified											3 Months Ended
	Mar. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Mar. 31, 2015 Recurring Basis [Member] USD ($)	Dec. 31, 2014 Recurring Basis [Member] USD ($)	Mar. 31, 2015 Recurring Basis [Member] Fair Value Measurements Using Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] USD ($)	Dec. 31, 2014 Recurring Basis [Member] Fair Value Measurements Using Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] USD ($)	Mar. 31, 2015 Recurring Basis [Member] Fair Value Measurements Using Significant Other Observable Inputs (Level 2) [Member] USD ($)	Dec. 31, 2014 Recurring Basis [Member] Fair Value Measurements Using Significant Other Observable Inputs (Level 2) [Member] USD ($)	Mar. 31, 2015 Recurring Basis [Member] Fair Value Measurements Using Significant Unobservable Inputs (Level 3) [Member] USD ($)	Dec. 31, 2014 Recurring Basis [Member] Fair Value Measurements Using Significant Unobservable Inputs (Level 3) [Member] USD ($)	Mar. 31, 2015 Forward Contracts [Member] Not Designated as Hedging Instrument [Member] USD ($)	Mar. 31, 2015 Forward Contracts [Member] Designated as Hedging Instrument [Member] USD ($)	Mar. 31, 2015 Euro-denominated Note EUR350.0 [Member] USD ($)	Mar. 31, 2015 Euro-denominated Note EUR350.0 [Member] EUR (€)	Dec. 31, 2014 Euro-denominated Note EUR350.0 [Member] USD ($)	Mar. 31, 2015 Carrying Value [Member] Euro-denominated Note EUR350.0 [Member] USD ($)	Dec. 31, 2014 Carrying Value [Member] Euro-denominated Note EUR350.0 [Member] USD ($)	Mar. 31, 2015 Fair Value [Member] Euro-denominated Note EUR350.0 [Member] Fair Value Measurements Using Significant Other Observable Inputs (Level 2) [Member] USD ($)	Dec. 31, 2014 Fair Value [Member] Euro-denominated Note EUR350.0 [Member] Fair Value Measurements Using Significant Other Observable Inputs (Level 2) [Member] USD ($)
Net investment hedges [Abstract]
Long-term Debt													$ 375.5	€ 350.0
Unrealized translation gain (loss) on net investment hedge included in accumulated other comprehensive (loss) income, net of taxes	5.6	(24.5)										(0.1)	5.7		(24.5)
Gain associated with forward contracts included in interest and other expenses											0.2
Assets [Abstract]
Deferred compensation plan assets			85.7	81.4	85.7	81.4	0	0	0	0
Foreign currency forward contracts			0.2	0.1	0	0	0.2	0.1	0	0
Total assets			85.9	81.5	85.7	81.4	0.2	0.1	0	0
Notes payable																$ 375.5	$ 423.4	$ 419.1	$ 471.6