Goodwill and Intangibles - Goodwill (Details)	3 Months Ended	12 Months Ended
	Dec. 31, 2015 USD ($)	Dec. 31, 2017 USD ($) item	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Oct. 29, 2017 USD ($)
Gross Balance
Balance at the beginning of the period		$ 699,800,000	$ 656,100,000
Acquired During the Period		2,000,000	47,000,000
Foreign Currency Translation and Other		15,800,000	(3,300,000)
Balance at the end of the period	$ 656,100,000	717,600,000	699,800,000	$ 656,100,000
Accumulated Impairment Losses
Balance at the beginning of the period		(167,100,000)	(167,100,000)
Balance at the end of the period	(167,100,000)	(167,100,000)	(167,100,000)	(167,100,000)
Net Goodwill		$ 550,500,000	532,700,000		$ 547,500,000
Number of reporting units | item		8
Number of geographic segments | item		3
Number of operating units that were combined		$ 2
Percentage of fair value of reporting unit in excess of carrying amount.					6.00%
Americas
Gross Balance
Balance at the beginning of the period		434,700,000	391,200,000
Acquired During the Period			43,300,000
Foreign Currency Translation and Other			200,000
Balance at the end of the period	391,200,000		434,700,000	391,200,000
Accumulated Impairment Losses
Balance at the beginning of the period		(24,500,000)	(24,500,000)
Balance at the end of the period	(24,500,000)		(24,500,000)	(24,500,000)
Net Goodwill			410,200,000
Europe
Gross Balance
Balance at the beginning of the period		234,900,000	238,600,000
Foreign Currency Translation and Other			(3,700,000)
Balance at the end of the period	238,600,000		234,900,000	238,600,000
Accumulated Impairment Losses
Balance at the beginning of the period		(129,700,000)	(129,700,000)
Balance at the end of the period	(129,700,000)		(129,700,000)	(129,700,000)
Net Goodwill			105,200,000
Americas
Gross Balance
Balance at the beginning of the period		434,700,000
Acquired During the Period		2,000,000
Foreign Currency Translation and Other		700,000
Balance at the end of the period		437,400,000	434,700,000
Accumulated Impairment Losses
Balance at the beginning of the period		(24,500,000)
Balance at the end of the period		(24,500,000)	(24,500,000)
Net Goodwill		412,900,000
Europe
Gross Balance
Balance at the beginning of the period		234,900,000
Foreign Currency Translation and Other		14,400,000
Balance at the end of the period		249,300,000	234,900,000
Accumulated Impairment Losses
Balance at the beginning of the period		(129,700,000)
Balance at the end of the period		(129,700,000)	(129,700,000)
Goodwill impairment charges	129,700,000			129,700,000
Net Goodwill		119,600,000
Goodwill impairment charges	129,700,000			129,700,000
Tax benefit on Impairment charge	3,400,000
Net impairment charge	126,300,000
APMEA
Gross Balance
Balance at the beginning of the period		30,200,000	26,300,000
Acquired During the Period			3,700,000
Foreign Currency Translation and Other		700,000	200,000
Balance at the end of the period	26,300,000	30,900,000	30,200,000	26,300,000
Accumulated Impairment Losses
Balance at the beginning of the period		(12,900,000)	(12,900,000)
Balance at the end of the period	$ (12,900,000)	(12,900,000)	(12,900,000)	$ (12,900,000)
Net Goodwill		18,000,000	$ 17,300,000
Water quality
Accumulated Impairment Losses
Net Goodwill		$ 0