Segment Information - Financial Information By Reportable Segment (Detail) - USD ($) $ in Millions		3 Months Ended								12 Months Ended
		Dec. 31, 2015	Sep. 26, 2015	Jun. 27, 2015	Mar. 28, 2015	Dec. 31, 2014	Sep. 27, 2014	Jun. 28, 2014	Mar. 29, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Net sales		$ 1,760.7	$ 1,552.1	$ 1,661.2	$ 1,475.0	$ 1,802.5	$ 1,758.4	$ 1,834.1	$ 1,644.0	$ 6,449.0	$ 7,039.0	$ 6,999.7
Segment income (loss)										1,001.2	1,135.7	1,013.2
Identifiable assets (1)		11,857.0				10,655.2				11,857.0	10,655.2	11,743.3
Depreciation										139.5	138.7	141.3
Capital expenditures										134.3	129.6	170.0
Operating Income (Loss)		(391.9)	$ 180.0	$ 217.9	$ 171.2	176.0	$ 267.4	$ 226.4	$ 182.1	177.2	851.9	742.6
Valves And Controls [Member]
Segment Reporting Information [Line Items]
Net sales										1,840.1	2,377.3	2,451.7
Segment income (loss)										223.0	398.5	349.3
Identifiable assets (1)	[1]	3,243.3				4,045.2				3,243.3	4,045.2	4,198.2
Depreciation										58.3	59.0	64.0
Capital expenditures										43.0	45.9	67.2
Flow & Filtration Solutions [Member]
Segment Reporting Information [Line Items]
Net sales										1,441.6	1,603.1	1,651.8
Segment income (loss)										185.1	199.5	202.4
Identifiable assets (1)	[1]	1,822.8				2,040.0				1,822.8	2,040.0	2,311.7
Depreciation										23.6	23.7	23.4
Capital expenditures										20.4	24.9	32.2
Water Quality Systems [Member]
Segment Reporting Information [Line Items]
Net sales										1,381.5	1,356.4	1,269.3
Segment income (loss)										281.8	253.3	227.9
Identifiable assets (1)	[1]	1,801.7				1,828.3				1,801.7	1,828.3	1,851.1
Depreciation										21.7	21.9	20.3
Capital expenditures										21.1	20.6	31.5
Technical Solutions
Segment Reporting Information [Line Items]
Net sales										1,809.3	1,728.1	1,663.4
Segment income (loss)										395.0	378.1	342.0
Identifiable assets (1)	[1]	4,488.4				2,117.3				4,488.4	2,117.3	2,093.4
Depreciation										27.6	24.2	23.6
Capital expenditures										47.4	24.0	16.2
All Other Segments
Segment Reporting Information [Line Items]
Net sales										(23.5)	(25.9)	(36.5)
Segment income (loss)										(83.7)	(93.7)	(108.4)
Identifiable assets (1)	[1]	$ 500.8				$ 624.4				500.8	624.4	1,288.9
Depreciation										8.3	9.9	10.0
Capital expenditures										$ 2.4	$ 14.2	$ 22.9

[1] All cash and cash equivalents and assets held for sale are included in "Other.