Goodwill and Other Identifiable Intangible Assets - Changes in Carrying Amount of Goodwill by Segment (Detail) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Jun. 27, 2015	Dec. 31, 2016	Dec. 31, 2015
Goodwill [Roll Forward]
Beginning Balance		$ 4,259.0	$ 3,230.3
Acquisitions/ divestitures	$ 43.2	20.8	1,116.4
Goodwill, Purchase Accounting Adjustments		(30.9)
Foreign currency translation/other		(31.5)	(87.7)
Ending Balance		4,217.4	4,259.0
Water Quality Systems [Member]
Goodwill [Roll Forward]
Beginning Balance		1,121.1	1,137.6
Acquisitions/ divestitures		20.8	0.0
Goodwill, Purchase Accounting Adjustments		0.0
Foreign currency translation/other		(4.8)	(16.5)
Ending Balance		1,137.1	1,121.1
Flow & Filtration Solutions [Member]
Goodwill [Roll Forward]
Beginning Balance		882.7	942.4
Acquisitions/ divestitures		0.0	0.0
Goodwill, Purchase Accounting Adjustments		0.0
Foreign currency translation/other		(25.2)	(59.7)
Ending Balance		857.5	882.7
Technical Solutions
Goodwill [Roll Forward]
Beginning Balance		2,255.2	1,150.3
Acquisitions/ divestitures		0.0	1,116.4
Goodwill, Purchase Accounting Adjustments		(30.9)
Foreign currency translation/other		(1.5)	(11.5)
Ending Balance		$ 2,222.8	$ 2,255.2