Derivatives and Hedging Activities - Effect of Derivative Instruments on Condensed Consolidated Statements of Operations (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in Earnings on Derivatives	$ (22.8)	$ (5.5)	$ (42.4)	$ 48.4
Designated as Hedging Instruments [Member] | Interest Rate and Currency Swap [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in Earnings on Derivatives	12.0	4.0	(22.0)	13.0
Designated as Hedging Instruments [Member] | Cash Flow Hedge [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in Earnings on Derivatives	(14.8)	(2.3)	(23.9)	13.6
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	(1.5)	2.9	0.2	3.7
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	(13.3)	(5.2)	(24.2)	9.8
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	0.2	0.2
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	$ (8.1)	$ (3.3)	$ (18.7)	$ 34.6