Derivatives and Hedging Activities - Effect of Derivative Instruments on Condensed Consolidated Statements of Operations (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in Earnings on Derivatives	$ 6.0	$ (19.6)
Designated as Hedging Instruments [Member] | Cash Flow Hedge [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in Earnings on Derivatives	(3.1)	(9.1)
Designated as Hedging Instruments [Member] | Cash Flow Hedge [Member] | Foreign Currency Forward Contracts [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in Earnings on Derivatives	0.6	1.7
Designated as Hedging Instruments [Member] | Cash Flow Hedge [Member] | Interest Rate and Currency Swap [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in Earnings on Derivatives	(3.8)	(10.9)
Designated as Hedging Instruments [Member] | Cash Flow Hedge [Member] | Treasury Lock [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in Earnings on Derivatives	0.1	0.1
Designated as Hedging Instruments [Member] | Fair Value Hedges [Member] | Interest Rate Swaps [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in Earnings on Derivatives	0.1	0.1
Not Designated as Hedging Instruments [Member] | Foreign Currency Forward Contracts [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in Earnings on Derivatives	$ 9.0	$ (10.6)