Financial Instruments - Interest Rate Swaps and Non-Designated Cash Flow Hedge (Details) $ in Millions		1 Months Ended	12 Months Ended
	Feb. 12, 2016 USD ($) item	Feb. 29, 2016 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Apr. 24, 2020 USD ($)	Apr. 23, 2020 USD ($)	Apr. 24, 2016 USD ($)	Apr. 23, 2016 USD ($)
Derivative instruments
Percentage of projected intercompany purchases hedged by forward exchange contracts			60.00%
Period of projected intercompany purchase transactions			12 months
Amount of Gain or (Loss) Recognized in Income on Derivatives
Cash flow hedges			$ (0.6)	$ (4.7)	$ 1.7
Maximum
Derivative instruments
Percentage of projected intercompany purchases hedged by forward exchange contracts			85.00%
Credit Agreement
Interest Rate Swaps
Borrowing capacity						$ 100.0
Term loan facility | Term Loan due February 2021
Interest Rate Swaps
Face amount	$ 300.0
Amount drawn		$ 300.0
Revolving credit facility
Interest Rate Swaps
Amount drawn			$ 200.0
Borrowing capacity	$ 500.0					$ 800.0	$ 500.0	$ 800.0	$ 500.0
Forward exchange contracts | Designated
Derivative instruments
Designated foreign currency hedges			0.1
Amount of Gain or (Loss) Recognized in Income on Derivatives
Amount expected to be reclassified			$ 0.1
Period of time for expected reclassification			12 months
Canadian Dollar to US Dollar Contracts
Interest Rate Swaps
Derivative notional amount			$ 14.3
US Dollar to Chinese Yuan Contracts
Interest Rate Swaps
Derivative notional amount			5.0
Interest Rate Swaps
Interest Rate Swaps
Gain (loss) recognized in Accumulated Other Comprehensive Loss, effective portion				$ (3.9)
Gain (loss) reclassified from other comprehensive income			$ 1.5
Interest Rate Swaps | Designated | Cash Flow Hedging
Interest Rate Swaps
Number of derivative contracts entered | item	2
Derivative fixed interest rate	1.31375%
Derivative notional amount	$ 225.0
Interest Rate Swaps | Designated | Cash Flow Hedging | LIBOR
Interest Rate Swaps
Derivative, floor interest rate	0.00%								0.00%
Interest Rate Swaps | Designated | Cash Flow Hedging | LIBOR | Maximum
Interest Rate Swaps
Derivative, floor interest rate								1.00%