Segment Information - Financial Information by Reportable Segment (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 26, 2015	Sep. 30, 2016	Sep. 26, 2015
Segment Reporting Information [Line Items]
Net sales	$ 1,210.7	$ 1,112.8	$ 3,701.9	$ 3,327.4
Segment Income (Loss)	216.2	187.5	635.1	526.8
Water Quality Systems [Member]
Segment Reporting Information [Line Items]
Net sales	328.6	322.0	1,057.2	1,016.6
Segment Income (Loss)	69.6	60.5	229.5	200.5
Flow & Filtration Solutions [Member]
Segment Reporting Information [Line Items]
Net sales	342.7	362.7	1,049.1	1,087.4
Segment Income (Loss)	49.5	53.2	144.5	146.7
Technical Solutions [Member]
Segment Reporting Information [Line Items]
Net sales	543.1	432.3	1,608.3	1,235.2
Segment Income (Loss)	119.6	101.0	344.0	265.0
Other
Segment Reporting Information [Line Items]
Net sales	(3.7)	(4.2)	(12.7)	(11.8)
Segment Income (Loss)	$ (22.5)	$ (27.2)	$ (82.9)	$ (85.4)