Derivative Instruments and Hedging Activities - Risk Management (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Derivative instruments and hedging activities
Fair value, net asset (liability)	$ (23.9)	$ (49.0)
Embedded derivatives in purchase and delivery contracts
Embedded derivatives in purchase and delivery contracts
Notional amount of derivative sale contracts	6.1	7.5
Notional amount of derivative purchase contracts	4.3	4.8
Forward currency and swap agreements
Derivative instruments and hedging activities
Notional Amount	636.3	783.3
Fair value, net asset (liability)	(27.4)	(52.2)
Forward currency contract
Derivative instruments and hedging activities
Notional amount, assets	10.0	175.8
Notional amount, liabilities	121.3	102.5
Not designated as accounting hedges
Assets	0.1	2.1
Liabilities	(1.3)	(0.4)
Fixed price commodity contracts
Derivative instruments and hedging activities
Notional Amount	5.8	8.8
Interest rate cross-currency swap agreements
Derivative instruments and hedging activities
Notional amount, liabilities	505.0	505.0
Designated as accounting hedges
Liabilities	$ (26.2)	$ (53.9)