Derivative Instruments and Hedging Activities - Gross Unrealized Losses from Derivative Instruments (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Derivative Instruments Gain Loss [Line Items]
Amount of Gain / (Loss) Recognized in AOCI	$ 0.4	$ (27.6)	$ 47.9	$ 38.1
Cash Flow Hedges [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of Gain / (Loss) Recognized in AOCI	0.4	(27.6)	47.9	38.1
Amount of Gain / (Loss) Reclassified from AOCI	(2.8)	15.0	(1.8)	30.4
Cash Flow Hedges [Member] | Foreign Exchange Forward Contracts [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of Gain / (Loss) Recognized in AOCI	0.4	(27.6)	47.9	38.1
Cash Flow Hedges [Member] | Foreign Exchange Forward Contracts [Member] | Cost of Products Sold [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of Gain / (Loss) Reclassified from AOCI	(2.6)	15.1	(1.5)	30.7
Cash Flow Hedges [Member] | Forward Starting Interest Rate Swaps [Member] | Interest Expense [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of Gain / (Loss) Reclassified from AOCI	$ (0.2)	$ (0.1)	$ (0.3)	$ (0.3)