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Financial Instruments (Schedule Of Effect Of Derivatives Recognized) (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | Dec. 31, 2017
Schedule of Cost-method Investments [Line Items] |  |  |  |  |
Document Period End Date |  |  | Jun. 30, 2018 |  |
Long-term Debt, Current Maturities | $ 24 |  | $ 24 |  | $ 26
Derivatives not designated as hedging instruments | 56 | $ (50) | 40 | $ (67) |
Debt due to Avis Budget Rental Car Funding (AESOP) LLC—related party | 8,265 |  | 8,265 |  | $ 6,480
Interest Rate Swaps [Member] |  |  |  |  |
Schedule of Cost-method Investments [Line Items] |  |  |  |  |
Derivative, Notional Amount | 1,000 |  | 1,000 |  |
Designated As Hedging Instruments [Member] | Interest Rate Swaps [Member] |  |  |  |  |
Schedule of Cost-method Investments [Line Items] |  |  |  |  |
Interest rate swaps | 2 | (2) | 8 | (1) |
Designated As Hedging Instruments [Member] | Foreign Exchange Contracts [Member] |  |  |  |  |
Schedule of Cost-method Investments [Line Items] |  |  |  |  |
Interest rate swaps | 26 | (26) | 13 | (31) |
Not Designated As Hedging Instruments [Member] | Foreign Exchange Contracts [Member] |  |  |  |  |
Schedule of Cost-method Investments [Line Items] |  |  |  |  |
Derivatives not designated as hedging instruments | 28 | (21) | 19 | (33) |
Not Designated As Hedging Instruments [Member] | Commodity Contracts [Member] |  |  |  |  |
Schedule of Cost-method Investments [Line Items] |  |  |  |  |
Derivatives not designated as hedging instruments | 1 | (1) | 1 | (2) |
Not Designated As Hedging Instruments [Member] | Interest Rate Contracts [Member] |  |  |  |  |
Schedule of Cost-method Investments [Line Items] |  |  |  |  |
Derivatives not designated as hedging instruments | (1) | 0 | (1) | 0 |
Operating Expense [Member] |  |  |  |  |
Schedule of Cost-method Investments [Line Items] |  |  |  |  |
Derivatives not designated as hedging instruments | 8 | 10 | 12 | 15 |
Interest Expense [Member] |  |  |  |  |
Schedule of Cost-method Investments [Line Items] |  |  |  |  |
Derivatives not designated as hedging instruments | $ 20 | $ 11 | $ 7 | $ 18 |

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- Definition Carrying amount as of the balance sheet date of obligations due to Avis Budget Rental Car Funding (AESOP) LLC- a related party, for rental vehicles. + References No definition available. + Details
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- Definition The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented. If there is no historical data in the report, use the filing date. The format of the date is CCYY-MM-DD. + References No definition available. + Details
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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5618551-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (a),(c),(d),(e) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959 + Details
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- Definition The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959 + Details
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- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19,20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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