Derivatives - Schedule of Pretax Effects of Derivative Financial Instruments Designated or Previously Designated as Effective Hedges (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) Recognized in OCI (effective portion)	$ (13.2)	$ (4.4)	$ (37.4)	$ (110.1)
Gain/(Loss) Reclassified from AOCI to Income	(3.2)	(6.0)	(0.1)	(32.6)
Interest Rate Swaps [Member] | Interest Expense, Net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) Recognized in OCI (effective portion)				(88.1)
Gain/(Loss) Reclassified from AOCI to Income	(2.1)	(2.4)	(6.2)	(5.1)
Foreign Currency Contracts [Member] | Sales and Cost of Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) Recognized in OCI (effective portion)	(12.8)	(0.7)	(35.8)	7.3
Gain/(Loss) Reclassified from AOCI to Income	(0.4)	1.6	12.4	2.1
Cross-currency Swaps [Member] | Other Income (Expense), Net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) Recognized in OCI (effective portion)	(0.4)	(3.7)	(1.6)	(29.3)
Gain/(Loss) Reclassified from AOCI to Income	$ (0.7)	$ (5.2)	$ (6.3)	$ (29.6)