Restructuring - Additional Information (Detail) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 26, 2015 USD ($)	Sep. 27, 2014 USD ($)	Sep. 26, 2015 USD ($) Person	Sep. 27, 2014 USD ($)	Dec. 31, 2014 Person
Restructuring Cost and Reserve [Line Items]
Number of employees | Person			1,500		1,150
Total restructuring costs	$ 25.2	$ 0.0	$ 49.2	$ 52.9
Valves & Controls
Restructuring Cost and Reserve [Line Items]
Number of employees | Person			1,150		600
Total restructuring costs	18.0	0.0	$ 31.6	27.7
Flow & Filtration Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Number of employees | Person			150		350
Total restructuring costs	3.5	0.0	$ 7.2	12.3
Water Quality Systems [Member]
Restructuring Cost and Reserve [Line Items]
Number of employees | Person			100		50
Total restructuring costs	1.5	0.0	$ 4.8	7.1
Technical Solutions
Restructuring Cost and Reserve [Line Items]
Number of employees | Person			100		150
Total restructuring costs	$ 2.2	$ 0.0	$ 5.6	$ 5.8