Goodwill and Intangibles - Goodwill (Details) $ in Millions	3 Months Ended			12 Months Ended
	Mar. 31, 2019 USD ($) segment	Mar. 31, 2019 USD ($) item	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Gross Balance
Balance at the beginning of the period			$ 711.9	$ 717.6
Acquired During the Period				1.5
Foreign Currency Translation and Other			(1.8)	(7.2)
Balance at the end of the period			710.1	711.9
Accumulated Impairment Losses
Balance at the beginning of the period			(167.1)	(167.1)
Balance at the end of the period			(167.1)	(167.1)
Net Goodwill	$ 543.0	$ 543.0	543.0	544.8
Number of geographic segments	3	3
Americas
Gross Balance
Balance at the beginning of the period			438.1	437.4
Acquired During the Period				1.5
Foreign Currency Translation and Other			0.1	(0.8)
Balance at the end of the period			438.2	438.1
Accumulated Impairment Losses
Balance at the beginning of the period			(24.5)	(24.5)
Balance at the end of the period			(24.5)	(24.5)
Net Goodwill	$ 413.7	$ 413.7	413.7	413.6
Europe
Gross Balance
Balance at the beginning of the period			243.7	249.3
Foreign Currency Translation and Other			(2.0)	(5.6)
Balance at the end of the period			241.7	243.7
Accumulated Impairment Losses
Balance at the beginning of the period			(129.7)	(129.7)
Balance at the end of the period			(129.7)	(129.7)
Net Goodwill	112.0	112.0	112.0	114.0
APMEA
Gross Balance
Balance at the beginning of the period			30.1	30.9
Foreign Currency Translation and Other			0.1	(0.8)
Balance at the end of the period			30.2	30.1
Accumulated Impairment Losses
Balance at the beginning of the period			(12.9)	(12.9)
Balance at the end of the period			(12.9)	(12.9)
Net Goodwill	$ 17.3	$ 17.3	$ 17.3	$ 17.2