Accounting Policies (Details) $ in Millions					3 Months Ended	12 Months Ended		24 Months Ended
	Dec. 30, 2016 USD ($)	Nov. 02, 2016 USD ($)	Feb. 26, 2016 USD ($)	Nov. 30, 2015 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2016 USD ($) item	Dec. 31, 2015 USD ($)	Dec. 31, 2016 USD ($)	Oct. 30, 2016 USD ($)	Apr. 03, 2016	Sep. 15, 2015 USD ($)
Goodwill
Number of reporting units | item						8
Gross Balance
Balance at the beginning of the period						$ 656.1	$ 676.4	$ 676.4
Acquired During the Period						47.0	12.9
Foreign Currency Translation and Other						(3.3)	(33.2)
Balance at the end of the period					$ 699.8	699.8	656.1	699.8
Accumulated Impairment Losses
Balance at the beginning of the period						(167.1)	(37.4)	(37.4)
Impairment Loss During the Period							(129.7)
Balance at the end of the period					(167.1)	(167.1)	(167.1)	(167.1)
Goodwill					532.7	532.7	489.0	532.7	$ 493.4
Business combination
Net Goodwill					532.7	532.7	489.0	532.7	$ 493.4
Water quality
Accumulated Impairment Losses
Goodwill					0.0	0.0		0.0
Business combination
Net Goodwill					$ 0.0	0.0		0.0
Americas
Gross Balance
Balance at the beginning of the period						391.2	398.0	398.0
Foreign Currency Translation and Other							(6.8)
Balance at the end of the period							391.2
Accumulated Impairment Losses
Balance at the beginning of the period						(24.5)	(24.5)	(24.5)
Balance at the end of the period							(24.5)
Goodwill							366.7
Business combination
Net Goodwill							366.7
EMEA
Gross Balance
Balance at the beginning of the period						238.6	265.5	265.5
Foreign Currency Translation and Other							(26.9)
Balance at the end of the period							238.6
Accumulated Impairment Losses
Balance at the beginning of the period						(129.7)
Impairment Loss During the Period							(129.7)
Balance at the end of the period							(129.7)
Goodwill							108.9
Business combination
Net Goodwill							108.9
PVI Riverside Holdings, Inc Member
Accumulated Impairment Losses
Goodwill		$ 39.1
Business combination
Aggregate consideration, net		$ 79.2
Outstanding shares acquired (as a percent)		100.00%
Net Goodwill		$ 39.1
Purchase price allocated to intangible assets		31.0
PVI Riverside Holdings, Inc Member | Customer relationships
Business combination
Purchase price allocated to intangible assets		$ 17.6
Aerco Korea
Accumulated Impairment Losses
Goodwill	$ 3.7		$ 3.3
Business combination
Aggregate consideration, net	$ 0.8		$ 4.0
Outstanding shares acquired (as a percent)	10.00%		50.00%
Ownership interest acquired (as a percent)	10.00%				10.00%
Percentage of ownership before transaction			40.00%
Net Goodwill	$ 3.7		$ 3.3
Purchase price allocated to intangible assets	$ 1.6
Shares remaining to be acquired										10.00%
Aerco Korea | Customer relationships
Business combination
Purchase price allocated to intangible assets			$ 1.6
Apex
Accumulated Impairment Losses
Goodwill				$ 12.9
Business combination
Aggregate consideration, net				$ 20.4
Outstanding shares acquired (as a percent)				80.00%
Net Goodwill				$ 12.9
Purchase price allocated to intangible assets				$ 10.1
Shares remaining to be acquired				20.00%
Number of years of closing				3 years
Americas
Gross Balance
Balance at the beginning of the period						391.2
Acquired During the Period						43.3
Foreign Currency Translation and Other						0.2
Balance at the end of the period					$ 434.7	434.7	391.2	434.7
Accumulated Impairment Losses
Balance at the beginning of the period						(24.5)
Balance at the end of the period					(24.5)	(24.5)	(24.5)	(24.5)
Goodwill					410.2	410.2		410.2
Business combination
Net Goodwill					410.2	410.2		410.2
EMEA
Gross Balance
Balance at the beginning of the period						238.6
Foreign Currency Translation and Other						(3.7)
Balance at the end of the period					234.9	234.9	238.6	234.9
Accumulated Impairment Losses
Balance at the beginning of the period						(129.7)
Balance at the end of the period					(129.7)	(129.7)	(129.7)	(129.7)
Goodwill					105.2	105.2		105.2
Business combination
Net Goodwill					105.2	105.2		105.2
Tax benefit on Impairment charge						3.4
Net impairment charge								126.3
Asia-Pacific
Gross Balance
Balance at the beginning of the period						26.3	12.9	12.9
Acquired During the Period						3.7	12.9
Foreign Currency Translation and Other						0.2	0.5
Balance at the end of the period					30.2	30.2	26.3	30.2
Accumulated Impairment Losses
Balance at the beginning of the period						(12.9)	(12.9)	(12.9)
Balance at the end of the period					(12.9)	(12.9)	(12.9)	(12.9)
Goodwill					17.3	17.3	13.4	17.3
Business combination
Net Goodwill					$ 17.3	$ 17.3	$ 13.4	$ 17.3
Certain Americas Product Lines | Sale of business
Goodwill
Goodwill of disposal group reclassified as assets held for sale											$ 4.1