Restructuring - Additional Information (Detail) $ in Millions	12 Months Ended			24 Months Ended	36 Months Ended
	Dec. 31, 2016 USD ($) Employee	Dec. 31, 2015 Employee	Dec. 31, 2014 Employee	Dec. 31, 2016 USD ($) Employee	Dec. 31, 2016 USD ($) Employee
2015 Acquisition Integration [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Number of Positions Eliminated	115	180
Restructuring and Related Cost, Number of Positions Eliminated				255
Restructuring and Related Cost, Expected Cost | $	$ 2			$ 2	$ 2
2014 T15 Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Number of Positions Eliminated	615	325	75
Restructuring and Related Cost, Number of Positions Eliminated					945
2011 Avis Europe Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Number of Positions Eliminated			230