Derivative Instruments and Hedging Activities - Gains and Losses (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Embedded derivative in purchase and delivery contracts
Derivative instruments and hedging activities
Impact on net income of unrealized gains and losses resulting from changes in fair value of derivative instruments	$ 0.6	$ (0.1)
Fixed price commodity contracts
Derivative instruments and hedging activities
Impact on net income of unrealized gains and losses resulting from changes in fair value of derivative instruments	(1.1)	0.5
Interest rate and cross currency swap agreements
Derivative instruments and hedging activities
Impact on net income of unrealized gains and losses resulting from changes in fair value of derivative instruments	4.1	(6.8)
Other current assets | Foreign exchange contracts
Derivative instruments and hedging activities
Impact on net income of unrealized gains and losses resulting from changes in fair value of derivative instruments	0.8	0.9
Other current assets | Embedded derivative in purchase and delivery contracts
Derivative instruments and hedging activities
Impact on net income of unrealized gains and losses resulting from changes in fair value of derivative instruments	0.1	0.1
Other current assets | Fixed price commodity contracts
Derivative instruments and hedging activities
Impact on net income of unrealized gains and losses resulting from changes in fair value of derivative instruments		0.3
Other current liabilities | Foreign exchange contracts
Derivative instruments and hedging activities
Impact on net income of unrealized gains and losses resulting from changes in fair value of derivative instruments	(0.8)	(0.4)
Other current liabilities | Embedded derivative in purchase and delivery contracts
Derivative instruments and hedging activities
Impact on net income of unrealized gains and losses resulting from changes in fair value of derivative instruments		$ (0.6)
Other current liabilities | Fixed price commodity contracts
Derivative instruments and hedging activities
Impact on net income of unrealized gains and losses resulting from changes in fair value of derivative instruments	(0.8)
Not designated as hedging instruments
Derivative instruments and hedging activities
Impact on net income of unrealized gains and losses resulting from changes in fair value of derivative instruments	27.3
Not designated as hedging instruments | Other current liabilities
Derivative instruments and hedging activities
Impact on net income of unrealized gains and losses resulting from changes in fair value of derivative instruments	29.9
Not designated as hedging instruments | Other current liabilities | Interest rate and cross currency swap agreements
Derivative instruments and hedging activities
Impact on net income of unrealized gains and losses resulting from changes in fair value of derivative instruments	$ (2.6)