Goodwill and Intangibles - Goodwill (Details) $ in Millions	12 Months Ended
	Dec. 31, 2018 USD ($) segment	Dec. 31, 2018 USD ($) item	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Oct. 28, 2018 USD ($)
Gross Balance
Balance at the beginning of the period			$ 717.6	$ 699.8
Acquired During the Period			1.5	2.0
Foreign Currency Translation and Other			(7.2)	15.8
Balance at the end of the period			711.9	717.6
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)
Goodwill impairment charges			0.0	0.0
Net Goodwill	$ 544.8	$ 544.8	544.8	550.5	$ 544.3
Number of reporting units | item		8
Number of geographic segments	3	3
Goodwill impairment charges			0.0	0.0
Americas
Gross Balance
Balance at the beginning of the period			437.4	434.7
Acquired During the Period				2.0
Foreign Currency Translation and Other				0.7
Balance at the end of the period				437.4
Accumulated Impairment Losses
Balance at the beginning of the period			(24.5)	(24.5)
Balance at the end of the period				(24.5)
Net Goodwill				412.9
Europe
Gross Balance
Balance at the beginning of the period			249.3	234.9
Foreign Currency Translation and Other				14.4
Balance at the end of the period				249.3
Accumulated Impairment Losses
Balance at the beginning of the period			(129.7)	(129.7)
Balance at the end of the period				(129.7)
Net Goodwill				119.6
Americas
Gross Balance
Balance at the beginning of the period			437.4
Acquired During the Period			1.5
Foreign Currency Translation and Other			(0.8)
Balance at the end of the period			438.1	437.4
Accumulated Impairment Losses
Balance at the beginning of the period			(24.5)
Balance at the end of the period			(24.5)	(24.5)
Net Goodwill	$ 413.6	$ 413.6	413.6
Europe
Gross Balance
Balance at the beginning of the period			249.3
Foreign Currency Translation and Other			(5.6)
Balance at the end of the period			243.7	249.3
Accumulated Impairment Losses
Balance at the beginning of the period			(129.7)
Balance at the end of the period			(129.7)	(129.7)
Net Goodwill	114.0	114.0	114.0
APMEA
Gross Balance
Balance at the beginning of the period			30.9	30.2
Foreign Currency Translation and Other			(0.8)	0.7
Balance at the end of the period			30.1	30.9
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	17.2	17.2	17.2	$ 18.0
Water quality
Accumulated Impairment Losses
Net Goodwill	$ 0.0	$ 0.0	$ 0.0