Derivative Financial Instruments and Fair Value Measurements (Details) In Millions, unless otherwise specified			3 Months Ended		6 Months Ended
	Jun. 30, 2014 USD ($)	Dec. 31, 2013 USD ($)	Jun. 30, 2014 Not Designated as Hedging Instrument [Member] USD ($)	Jun. 30, 2013 Not Designated as Hedging Instrument [Member] USD ($)	Jun. 30, 2014 Not Designated as Hedging Instrument [Member] USD ($)	Jun. 30, 2013 Not Designated as Hedging Instrument [Member] USD ($)	Jun. 30, 2014 Recurring Basis [Member] USD ($)	Dec. 31, 2013 Recurring Basis [Member] USD ($)	Jun. 30, 2014 Recurring Basis [Member] Fair Value Measurements Using Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] USD ($)	Dec. 31, 2013 Recurring Basis [Member] Fair Value Measurements Using Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] USD ($)	Jun. 30, 2014 Recurring Basis [Member] Fair Value Measurements Using Significant Other Observable Inputs (Level 2) [Member] USD ($)	Dec. 31, 2013 Recurring Basis [Member] Fair Value Measurements Using Significant Other Observable Inputs (Level 2) [Member] USD ($)	Jun. 30, 2014 Recurring Basis [Member] Fair Value Measurements Using Significant Unobservable Inputs (Level 3) [Member] USD ($)	Dec. 31, 2013 Recurring Basis [Member] Fair Value Measurements Using Significant Unobservable Inputs (Level 3) [Member] USD ($)	Jun. 30, 2014 Euro-denominated Note EUR350.0 [Member] USD ($)	Jun. 30, 2014 Euro-denominated Note EUR350.0 [Member] EUR (€)	Jun. 30, 2014 Carrying Value [Member] Euro-denominated Note EUR350.0 [Member] USD ($)	Dec. 31, 2013 Carrying Value [Member] Euro-denominated Note EUR350.0 [Member] USD ($)	Jun. 30, 2014 Fair Value [Member] Euro-denominated Note EUR350.0 [Member] Fair Value Measurements Using Significant Other Observable Inputs (Level 2) [Member] USD ($)	Dec. 31, 2013 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															$ 479.1	€ 350.0
Unrealized loss from economic hedges included in accumulated other comprehensive income, net of taxes	59.7	60.6
Gain associated with forward contracts			0.2		0.2
Loss associated with forward contracts				0.1		0.3
Assets [Abstract]
Deferred compensation plan assets							77.8	71.6	77.8	71.6	0	0	0	0
Foreign currency forward contracts							0.3	0.3	0	0	0.3	0.3	0	0
Total assets							78.1	71.9	77.8	71.6	0.3	0.3	0	0
Liabilities [Abstract]
Foreign currency forward contracts							0.1		0		0.1		0
Total Liabilities							0.1		0		0.1		0
Notes payable																	$ 479.1	$ 480.9	$ 534.3	$ 520.1