Goodwill and Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Goodwill, Gross
Balance, beginning of period			$ 235.1
Purchase accounting adjustments			0.0
Foreign currency fluctuations			(3.3)
Balance, end of period	$ 231.8		231.8		$ 235.1
Accumulated Impairment Losses
Balance, beginning of period			(40.0)
Foreign currency fluctuations			2.1
Balance, end of period	(37.9)		(37.9)		(40.0)
Goodwill, Net
Balance, beginning of period			195.1
Purchase accounting adjustments			0.0
Foreign currency fluctuations			(1.2)
Balance, end of period	193.9		193.9		195.1
Acquired Finite-lived Intangible Assets
Original cost	201.9		201.9		203.0
Accumulated amortization	(75.2)		(75.2)		(65.3)
Carrying value	126.7		126.7		137.7
Purchase of Intangible Assets			0.1	$ 0.4
Amortization expense	5.0	$ 5.8	10.0	$ 11.5
Estimated aggregate amortization expense of Intangible Assets
Remaining 2019	10.2		10.2
2020	18.9		18.9
2021	16.9		16.9
2022	15.3		15.3
2023	13.8		13.8
Thereafter	51.6		51.6
Total	126.7		126.7
Customer Lists
Acquired Finite-lived Intangible Assets
Original cost	153.2		153.2		154.1
Accumulated amortization	(57.2)		(57.2)		(49.8)
Carrying value	96.0		$ 96.0		$ 104.3
Weighted-average original life (in years)			15 years		15 years
Trade Names
Acquired Finite-lived Intangible Assets
Original cost	31.8		$ 31.8		$ 31.8
Accumulated amortization	(9.8)		(9.8)		(8.2)
Carrying value	22.0		$ 22.0		$ 23.6
Weighted-average original life (in years)			11 years		11 years
Technology
Acquired Finite-lived Intangible Assets
Original cost	16.9		$ 16.9		$ 17.1
Accumulated amortization	(8.2)		(8.2)		(7.3)
Carrying value	$ 8.7		$ 8.7		$ 9.8
Weighted-average original life (in years)			11 years		11 years