Summary of Significant Accounting Policies - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($) segment	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Number of reportable segments | segment	3
Foreign exchange transaction gains (losses) | $	$ 51.8	$ (3.7)	$ (10.6)
Maximum remaining expiration period for foreign currency forward contracts	1 year
Minimum
Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life	2 years
Definite-lived intangible assets useful life	5 years
Maximum
Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life	60 years
Definite-lived intangible assets useful life	25 years
Planned Major Maintenance Activities
Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life	12 months