Restructuring - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014 Person	Dec. 31, 2013 Person	Dec. 31, 2012 Person
Restructuring Cost and Reserve [Line Items]
Number of employees	1,150	1,100	800
Restructuring costs	$ 88.3	$ 103.2	$ 48.7
Valves And Controls [Member]
Restructuring Cost and Reserve [Line Items]
Number of employees	600	500	300
Restructuring costs	48.8	51.0	5.1
Process Technologies [Member]
Restructuring Cost and Reserve [Line Items]
Number of employees	100	150	200
Restructuring costs	18.6	9.4	25.2
Flow Technologies [Member]
Restructuring Cost and Reserve [Line Items]
Number of employees	300	150	100
Restructuring costs	10.6	13.4	5.7
Technical Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Number of employees	150	300	200
Restructuring costs	$ 4.3	$ 19.4	$ 12.7