Financial Instruments (Risk Management Instruments) (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Carrying Amount | Foreign currency exchange contracts | Not Designated as Hedging Instrument
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other receivables	$ 3.7	$ 18.4
Other current liabilities	(17.9)	(11.9)
Estimate of Fair Value Measurement | Foreign currency exchange contracts | Not Designated as Hedging Instrument
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other receivables	3.7	18.4
Other current liabilities	(17.9)	(11.9)
Estimate of Fair Value Measurement | Foreign currency exchange contracts | Not Designated as Hedging Instrument | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other receivables	0.0	0.0
Other current liabilities	0.0	0.0
Estimate of Fair Value Measurement | Foreign currency exchange contracts | Not Designated as Hedging Instrument | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other receivables	3.7	18.4
Other current liabilities	(17.9)	(11.9)
Estimate of Fair Value Measurement | Foreign currency exchange contracts | Not Designated as Hedging Instrument | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other receivables	0.0	0.0
Other current liabilities	0.0	0.0
Fair Value Hedging | Carrying Amount | Interest rate contracts | Designated as Hedging Instrument
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other noncurrent assets	196.4	72.0
Fair Value Hedging | Estimate of Fair Value Measurement | Interest rate contracts | Designated as Hedging Instrument
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other noncurrent assets	196.4	72.0
Fair Value Hedging | Estimate of Fair Value Measurement | Interest rate contracts | Designated as Hedging Instrument | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other noncurrent assets	0.0	0.0
Fair Value Hedging | Estimate of Fair Value Measurement | Interest rate contracts | Designated as Hedging Instrument | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other noncurrent assets	196.4	72.0
Fair Value Hedging | Estimate of Fair Value Measurement | Interest rate contracts | Designated as Hedging Instrument | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other noncurrent assets	0.0	0.0
Cash Flow Hedging | Carrying Amount | Interest rate contracts | Designated as Hedging Instrument
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other noncurrent assets	7.4	43.3
Other noncurrent liabilities	(289.3)
Cash Flow Hedging | Carrying Amount | Cross-currency interest rate swaps | Designated as Hedging Instrument
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other noncurrent assets		3.0
Other noncurrent liabilities	(57.7)	(20.1)
Cash Flow Hedging | Estimate of Fair Value Measurement | Interest rate contracts | Designated as Hedging Instrument
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other noncurrent assets	7.4	43.3
Other noncurrent liabilities	(289.3)
Cash Flow Hedging | Estimate of Fair Value Measurement | Interest rate contracts | Designated as Hedging Instrument | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other noncurrent assets	0.0	0.0
Other noncurrent liabilities	0.0
Cash Flow Hedging | Estimate of Fair Value Measurement | Interest rate contracts | Designated as Hedging Instrument | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other noncurrent assets	7.4	43.3
Other noncurrent liabilities	(289.3)
Cash Flow Hedging | Estimate of Fair Value Measurement | Interest rate contracts | Designated as Hedging Instrument | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other noncurrent assets	0.0	0.0
Other noncurrent liabilities	0.0
Cash Flow Hedging | Estimate of Fair Value Measurement | Cross-currency interest rate swaps | Designated as Hedging Instrument
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other noncurrent assets		3.0
Other noncurrent liabilities	(57.7)	(20.1)
Cash Flow Hedging | Estimate of Fair Value Measurement | Cross-currency interest rate swaps | Designated as Hedging Instrument | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other noncurrent assets		0.0
Other noncurrent liabilities	0.0	0.0
Cash Flow Hedging | Estimate of Fair Value Measurement | Cross-currency interest rate swaps | Designated as Hedging Instrument | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other noncurrent assets		3.0
Other noncurrent liabilities	(57.7)	(20.1)
Cash Flow Hedging | Estimate of Fair Value Measurement | Cross-currency interest rate swaps | Designated as Hedging Instrument | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other noncurrent assets		0.0
Other noncurrent liabilities	0.0	0.0
Net investment hedges | Carrying Amount | Cross-currency interest rate swaps | Designated as Hedging Instrument
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other noncurrent assets	84.5	45.1
Other receivables	1.2
Other current liabilities	(7.1)	(21.4)
Other noncurrent liabilities		(5.7)
Net investment hedges | Estimate of Fair Value Measurement | Cross-currency interest rate swaps | Designated as Hedging Instrument
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other noncurrent assets	84.5	45.1
Other receivables	1.2
Other current liabilities	(7.1)	(21.4)
Other noncurrent liabilities		(5.7)
Net investment hedges | Estimate of Fair Value Measurement | Cross-currency interest rate swaps | Designated as Hedging Instrument | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other noncurrent assets	0.0	0.0
Other receivables	0.0
Other current liabilities	0.0	0.0
Other noncurrent liabilities		0.0
Net investment hedges | Estimate of Fair Value Measurement | Cross-currency interest rate swaps | Designated as Hedging Instrument | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other noncurrent assets	84.5	45.1
Other receivables	1.2
Other current liabilities	(7.1)	(21.4)
Other noncurrent liabilities		(5.7)
Net investment hedges | Estimate of Fair Value Measurement | Cross-currency interest rate swaps | Designated as Hedging Instrument | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other noncurrent assets	0.0	0.0
Other receivables	0.0
Other current liabilities	$ 0.0	0.0
Other noncurrent liabilities		$ 0.0