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Financial Instruments - Additional Information (Detail) € in Millions, $ in Millions |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
May 18, 2017 EUR (€) | Sep. 30, 2020 USD ($) swap | Dec. 31, 2018 USD ($) | Mar. 31, 2016 USD ($) Agreement | Mar. 31, 2016 EUR (€) Agreement | Dec. 31, 2021 USD ($) swap | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Sep. 30, 2019 swap
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |  |
Proceeds from unwinding of cross currency swap derivative instruments |  |  |  |  |  | $ 0 | $ 0 | $ 26 |
Payments for (Proceeds from) Hedge, Investing Activities |  |  |  |  |  | 0 | (14) | $ 0 |
Derivative Liability, Fair Value, Gross Liability |  |  |  |  |  | 7 | 29 |  |
Forward Currency Contracts [Member] |  |  |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |  |
Derivative instruments outstanding |  |  |  |  |  | 46 | 221 |  |
Currency Swap [Member] |  |  |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |  |
Derivative instruments outstanding |  |  |  |  |  | 300 | 300 |  |
Payments for (Proceeds from) Hedge, Investing Activities |  | $ 15 |  |  |  |  |  |  |
Interest Receivable |  | $ 2 |  |  |  |  |  |  |
Derivative Liability, Fair Value, Gross Liability |  |  |  |  |  | 5 | 23 |  |
Interest Rate Swap [Member] |  |  |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |  |
Loss incurred on termination of interest rate swaps |  |  |  | $ 3 | € 3 |  |  |  |
Gain on deal contingent derivatives | € | € 5 |  |  |  |  |  |  |  |
Number of interest rate derivatives held | Agreement |  |  |  | 2 | 2 |  |  |  |
Fair Value of Derivatives Not Designated as Hedging Instrument [Member] |  |  |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |  |
Derivative Liability, Fair Value, Gross Liability |  |  |  |  |  | 2 | 0 |  |
Fair Value of Derivatives Not Designated as Hedging Instrument [Member] | Currency Swap [Member] |  |  |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |  |
Derivative Liability, Fair Value, Gross Liability |  |  |  |  |  | 0 | 0 |  |
Designated as Hedging Instrument [Member] |  |  |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |  |
Derivative Liability, Fair Value, Gross Liability |  |  |  |  |  | $ 5 | 29 |  |
Designated as Hedging Instrument [Member] | Currency Swap [Member] |  |  |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |  |
Interest Income (Expense), Net |  |  | $ 8 |  |  |  |  |  |
Number of Foreign Currency Derivatives Held | swap |  | 2 |  |  |  | 2 |  |  | 4
Proceeds from unwinding of cross currency swap derivative instruments |  |  | $ 34 |  |  |  |  |  |
Derivative Liability, Fair Value, Gross Liability |  |  |  |  |  | $ 5 | $ 23 |  |
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] |  |  |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |  |
Derivative Liability, Fair Value, Gross Liability |  |  |  |  |  | $ 5 |  |  |

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- 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 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5624163-113959 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -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 210 -SubTopic 20 -Section 55 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226000-175313 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226052-175313 + Details
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