Financial Instruments - Classification and Amount of Gain (Loss) Recognized in Income on Fair Value and Cash Flow Hedging Relationships (Detail) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cost of products sold [Member]
Derivatives, Fair Value [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$ 3,925.9	$ 3,712.2	$ 3,525.7
Cost of products sold [Member] \| Foreign exchange contracts [Member]
Derivatives, Fair Value [Line Items]
Amount of gain or (loss) reclassified from accumulated other comprehensive (loss) income into income	(3.0)	4.1	2.2
Cost of products sold [Member] \| Commodity Contracts [Member]
Derivatives, Fair Value [Line Items]
Amount of gain or (loss) reclassified from accumulated other comprehensive (loss) income into income		(0.1)	(0.2)
Interest expense [Member]
Derivatives, Fair Value [Line Items]
Derivative, Gain (Loss) on Derivative, Net	83.9	94.2	74.5
Interest expense [Member] \| Interest rate contracts [Member]
Derivatives, Fair Value [Line Items]
Amount of gain or (loss) reclassified from accumulated other comprehensive (loss) income into income	0.6	0.4	0.1
Other income/expense, net [Member]
Derivatives, Fair Value [Line Items]
Derivative, Gain (Loss) on Derivative, Net	13.3	29.0	16.3
Other income/expense, net [Member] \| Foreign exchange contracts [Member]
Derivatives, Fair Value [Line Items]
Derivative, Gain (Loss) on Derivative, Net	2.9	4.0	(3.4)
Other income/expense, net [Member] \| Foreign exchange contracts [Member] \| Designated as hedging instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$ (1.8)	$ (3.0)	$ 5.0

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5618551-113959

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The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4D
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5624177-113959

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Topic 815
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-Paragraph 4C
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-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5624171-113959

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No definition available.

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Amount of gain (loss) from the increase (decrease) in fair value of foreign currency derivatives and nonderivative instruments designated as fair value hedging instruments which were recognized in earnings, net of offsets by the gain (loss) on the hedged item to the extent that the fair value hedge was determined to be effective.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5624171-113959

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5618551-113959

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