Restructuring - Restructuring Costs by Segment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 24.5	$ 41.3	$ 39.5
Water Quality Systems [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	6.0	6.2	15.2
Flow & Filtration Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	4.5	11.2	14.0
Technical Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	12.3	15.7	4.3
Corporate and Other [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 1.7	$ 8.2	$ 6.0