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Financial Instruments and Risk Management - Fair Value of Derivative Instruments (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Derivatives, Fair Value [Line Items]
Total Asset Derivatives	$ 65	$ 8
Total Liability Derivatives	(2)	(7)
Foreign Exchange Forward Contracts [Member]
Derivatives, Fair Value [Line Items]
Total Asset Derivatives	50
Total Liability Derivatives	(2)
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Total Asset Derivatives	55	5
Total Liability Derivatives		(6)
Designated as Hedging Instrument [Member] | Foreign Exchange Forward Contracts [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Total Asset Derivatives	40	4
Designated as Hedging Instrument [Member] | Foreign Exchange Forward Contracts [Member] | Other Payables and Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Total Liability Derivatives		(4)
Designated as Hedging Instrument [Member] | Currency Collars [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Total Asset Derivatives	15	1
Designated as Hedging Instrument [Member] | Currency Collars [Member] | Other Payables and Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Total Liability Derivatives		(2)
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Total Asset Derivatives	10	3
Total Liability Derivatives	(2)	(1)
Not Designated as Hedging Instrument [Member] | Foreign Exchange Forward Contracts [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Total Asset Derivatives	10	3
Not Designated as Hedging Instrument [Member] | Foreign Exchange Forward Contracts [Member] | Other Payables and Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Total Liability Derivatives	$ (2)	$ (1)

X

- Definition

Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226000-175313

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 20
-Section 50
-Paragraph 4D
-Subparagraph (c)(2)
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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-SubTopic 20
-Section 50
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-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
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-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5624163-113959

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X

- Definition

Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 20
-Section 50
-Paragraph 4D
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=121570589&loc=SL51823488-111719

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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