Leasing - Components of Lease Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Components of lease expense [Line Items]
Amortization of right-of-use assets	$ 1.0
Interest on lease liabilities	0.3
Total finance lease cost	1.3
Operating lease cost	28.9
Short-term lease cost	5.9
Variable lease cost	7.2
Total lease cost	43.3
Cost of Sales [Member]
Components of lease expense [Line Items]
Lease expense	31.9	$ 28.4	$ 25.3
Selling, General and Administrative Expenses [Member]
Components of lease expense [Line Items]
Lease expense	$ 10.1	$ 10.0	$ 10.2