Financial Instruments, Risk Management and Fair Value Measurements - Recurring Fair Value Adjustments (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Assets
Derivatives - Foreign exchange	$ 8.3	$ 19.8
Liabilities
Derivatives	17.2	8.4
Foreign exchange contracts
Assets
Derivatives - Foreign exchange	8.3	19.8
Liabilities
Derivatives	16.3	8.2
Interest Rate
Liabilities
Derivatives	0.9	0.2
Fair Value, Measurements, Recurring
Assets
Other	20.2	17.7
Assets, Fair Value Disclosure	20.4	29.4
Liabilities
Other	32.8	27.4
Total Liabilities	41.9	27.7
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets
Other	20.2	17.7
Assets, Fair Value Disclosure	20.2	17.7
Liabilities
Other	29.7	24.3
Total Liabilities	29.7	24.3
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Assets
Other	0.0	0.0
Assets, Fair Value Disclosure	0.2	11.7
Liabilities
Other	3.1	3.1
Total Liabilities	12.2	3.4
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Assets
Other	0.0	0.0
Assets, Fair Value Disclosure	0.0	0.0
Liabilities
Other	0.0	0.0
Total Liabilities	0.0	0.0
Fair Value, Measurements, Recurring | Foreign exchange contracts
Assets
Derivatives - Foreign exchange	0.2	11.7
Liabilities
Derivatives	8.2	0.1
Fair Value, Measurements, Recurring | Foreign exchange contracts | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets
Derivatives - Foreign exchange	0.0	0.0
Liabilities
Derivatives	0.0	0.0
Fair Value, Measurements, Recurring | Foreign exchange contracts | Significant Other Observable Inputs (Level 2)
Assets
Derivatives - Foreign exchange	0.2	11.7
Liabilities
Derivatives	8.2	0.1
Fair Value, Measurements, Recurring | Foreign exchange contracts | Significant Unobservable Inputs (Level 3)
Assets
Derivatives - Foreign exchange	0.0	0.0
Liabilities
Derivatives	0.0	0.0
Fair Value, Measurements, Recurring | Interest Rate
Liabilities
Derivatives	0.9	0.2
Fair Value, Measurements, Recurring | Interest Rate | Quoted Prices in Active Markets for Identical Assets (Level 1)
Liabilities
Derivatives	0.0	0.0
Fair Value, Measurements, Recurring | Interest Rate | Significant Other Observable Inputs (Level 2)
Liabilities
Derivatives	0.9	0.2
Fair Value, Measurements, Recurring | Interest Rate | Significant Unobservable Inputs (Level 3)
Liabilities
Derivatives	$ 0.0	$ 0.0