Segment Information - Financial Information by Reportable Segment (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 27, 2015	Jun. 30, 2016	Jun. 27, 2015
Segment Reporting Information [Line Items]
Net sales	$ 1,733.3	$ 1,661.2	$ 3,308.8	$ 3,136.2
Segment Income (Loss)	291.4	273.5	501.2	472.8
Water Quality Systems [Member]
Segment Reporting Information [Line Items]
Net sales	397.1	387.7	728.6	694.6
Segment Income (Loss)	98.2	88.2	159.9	140.0
Flow & Filtration Solutions [Member]
Segment Reporting Information [Line Items]
Net sales	368.7	374.6	706.4	724.7
Segment Income (Loss)	55.5	57.1	95.0	93.5
Technical Solutions [Member]
Segment Reporting Information [Line Items]
Net sales	540.6	407.1	1,065.2	802.9
Segment Income (Loss)	111.6	86.4	224.4	164.0
Valves And Controls [Member]
Segment Reporting Information [Line Items]
Net sales	433.6	496.4	820.6	925.6
Segment Income (Loss)	43.7	64.4	69.0	119.8
Other
Segment Reporting Information [Line Items]
Net sales	(6.7)	(4.6)	(12.0)	(11.6)
Segment Income (Loss)	$ (17.6)	$ (22.6)	$ (47.1)	$ (44.5)