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Restructuring - Additional Information (Detail) $ in Millions | 12 Months Ended | 15 Months Ended | 24 Months Ended | 60 Months Ended
--- | --- | --- | --- | ---
Dec. 31, 2018 USD ($) Employee | Dec. 31, 2017 USD ($) Employee | Dec. 31, 2016 USD ($) | Dec. 31, 2018 Employee | Dec. 31, 2018 Employee | Dec. 31, 2018 Employee
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring Charges | $ 22 | $ 63 | $ 29 |  |  |
2018 Truck Restructuring [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring Charges | 5 | 5 |  |  |  |
Restructuring and Related Cost, Expected Number of Positions Eliminated | Employee |  |  |  | 25 |  |
Workforce Restructuring [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring Charges | $ 13 |  |  |  |  |
Restructuring and Related Cost, Expected Number of Positions Eliminated | Employee | 190 |  |  |  |  |
Restructuring and Related Cost, Number of Positions Eliminated | Employee | 180 |  |  |  |  |
2015 Acquisition Integration [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring Charges |  |  | 9 |  |  |
T17 Restructuring [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring Charges | $ 2 | $ 35 |  |  |  |
Restructuring and Related Cost, Expected Number of Positions Eliminated | Employee | 680 |  |  |  |  |
Restructuring and Related Cost, Number of Positions Eliminated | Employee |  |  |  |  | 675 |
2014 T15 Restructuring [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring Charges | $ 1 |  | 21 |  |  |
Restructuring and Related Cost, Expected Number of Positions Eliminated | Employee |  | 615 |  |  |  |
Restructuring and Related Cost, Number of Positions Eliminated | Employee |  |  |  |  |  | 990
2011 Avis Europe Restructuring [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring Charges |  |  | (1) |  |  |
Americas | 2018 Truck Restructuring [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring Charges | 5 | $ 5 |  |  |  |
Americas | Workforce Restructuring [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring Charges | 4 |  |  |  |  |
Americas | 2015 Acquisition Integration [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring Charges |  |  | 0 |  |  |
Americas | T17 Restructuring [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring Charges | 2 | 25 |  |  |  |
Americas | 2014 T15 Restructuring [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring Charges | 0 |  | 11 |  |  |
Americas | 2011 Avis Europe Restructuring [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring Charges |  |  | 0 |  |  |
International | 2018 Truck Restructuring [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring Charges | 0 | 0 |  |  |  |
International | Workforce Restructuring [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring Charges | 9 |  |  |  |  |
International | 2015 Acquisition Integration [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring Charges |  |  | 9 |  |  |
International | T17 Restructuring [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring Charges | 0 | $ 10 |  |  |  |
International | 2014 T15 Restructuring [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring Charges | $ 1 |  | 10 |  |  |
International | 2011 Avis Europe Restructuring [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring Charges |  |  | $ (1) |  |  |

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