Derivatives and Financial Instruments - Assets and Liabilities Measured at Fair Value (Detail) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contract liabilities	$ (5,400,000)			$ (47,200,000)
Impairment of Intangible Assets (Excluding Goodwill)	13,300,000		$ 0
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contract assets	5,500,000			600,000
Foreign currency contract liabilities	(5,400,000)			(47,200,000)
Deferred compensation plan assets	47,900,000			49,400,000
Total recurring fair value measurements	48,000,000			2,800,000
Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contract assets	0			0
Foreign currency contract liabilities	0			0
Deferred compensation plan assets	41,600,000			42,800,000
Total recurring fair value measurements	41,600,000			42,800,000
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contract assets	5,500,000			600,000
Foreign currency contract liabilities	(5,400,000)			(47,200,000)
Deferred compensation plan assets	6,300,000			6,600,000
Total recurring fair value measurements	6,400,000			(40,000,000)
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contract assets	0			0
Foreign currency contract liabilities	0			0
Deferred compensation plan assets	0			0
Total recurring fair value measurements	$ 0			$ 0
Valves And Controls [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment of Intangible Assets (Excluding Goodwill)		$ 39,500,000
Goodwill, Impairment Loss		$ 515,200,000