Summary of Changes to Restructuring-Related Liabilities (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]
Balance, beginning	$ 11	$ 17	$ 22
Restructuring expense	29	18	26
Balance, ending	6	11	17
Americas
Restructuring Cost and Reserve [Line Items]
Balance, beginning	1	4	1
Balance, ending	1	1	4
International
Restructuring Cost and Reserve [Line Items]
Balance, beginning	10	13	21
Balance, ending	5	10	13
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Balance, beginning	10	14	17
Balance, ending	5	10	14
Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Balance, beginning	1	3	5
Balance, ending	1	1	3
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Balance, beginning	0	0	0
Balance, ending	0	0	0
2011 Avis Europe Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense	(1)		21
Cash payment/utilization	(1)	(9)	(30)
2011 Avis Europe Restructuring [Member] | Americas
Restructuring Cost and Reserve [Line Items]
Restructuring expense	0		4
Cash payment/utilization	0	(1)	(4)
2011 Avis Europe Restructuring [Member] | International
Restructuring Cost and Reserve [Line Items]
Restructuring expense	(1)		17
Cash payment/utilization	(1)	(8)	(26)
2011 Avis Europe Restructuring [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense	(1)		20
Cash payment/utilization	(1)	(7)	(27)
2011 Avis Europe Restructuring [Member] | Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense	0		1
Cash payment/utilization	0	(2)	(3)
2011 Avis Europe Restructuring [Member] | Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense	0		0
Cash payment/utilization	0	0	0
2014 T15 Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense	21	9	5
Cash payment/utilization	(18)	(12)	(1)
2014 T15 Restructuring [Member] | Americas
Restructuring Cost and Reserve [Line Items]
Restructuring expense	11	6	4
Cash payment/utilization	(11)	(8)	(1)
2014 T15 Restructuring [Member] | International
Restructuring Cost and Reserve [Line Items]
Restructuring expense	10	3	1
Cash payment/utilization	(7)	(4)	0
2014 T15 Restructuring [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense	15	9	5
Cash payment/utilization	(12)	(12)	(1)
2014 T15 Restructuring [Member] | Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense	1	0	0
Cash payment/utilization	(1)	0	0
2014 T15 Restructuring [Member] | Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense	5	0	0
Cash payment/utilization	(5)	0	$ 0
2015 Acquisition Integration [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense	9	9
Cash payment/utilization	(15)	(3)
2015 Acquisition Integration [Member] | Americas
Restructuring Cost and Reserve [Line Items]
Restructuring expense	0	1
Cash payment/utilization	0	(1)
2015 Acquisition Integration [Member] | International
Restructuring Cost and Reserve [Line Items]
Restructuring expense	9	8
Cash payment/utilization	(15)	(2)
2015 Acquisition Integration [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense	9	9
Cash payment/utilization	(15)	(3)
2015 Acquisition Integration [Member] | Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense	0	0
Cash payment/utilization	0	0
2015 Acquisition Integration [Member] | Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense	0	0
Cash payment/utilization	$ 0	$ 0