Restructuring (Summary Of Changes To Restructuring-Related Liabilities) (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Restructuring Reserve [Roll Forward]
Balance as of January 1, 2016	$ 11
Restructuring expense	15	$ 1
Balance as of March 31, 2016	13
Americas
Restructuring Reserve [Roll Forward]
Balance as of January 1, 2016	1
Balance as of March 31, 2016	4
International
Restructuring Reserve [Roll Forward]
Balance as of January 1, 2016	10
Balance as of March 31, 2016	9
2014 T15 Restructuring [Member]
Restructuring Reserve [Roll Forward]
Restructuring expense	12
Payment for Restructuring	(4)
2014 T15 Restructuring [Member] | Americas
Restructuring Reserve [Roll Forward]
Restructuring expense	7
Payment for Restructuring	(4)
2014 T15 Restructuring [Member] | International
Restructuring Reserve [Roll Forward]
Restructuring expense	5
Payment for Restructuring	0
2015 Acquisition Integration [Member]
Restructuring Reserve [Roll Forward]
Restructuring expense	3
Payment for Restructuring	(8)
2015 Acquisition Integration [Member] | Americas
Restructuring Reserve [Roll Forward]
Restructuring expense	0
Payment for Restructuring	0
2015 Acquisition Integration [Member] | International
Restructuring Reserve [Roll Forward]
Restructuring expense	3
Payment for Restructuring	(8)
2011 Avis Europe Restructuring [Member]
Restructuring Reserve [Roll Forward]
Payment for Restructuring	(1)
2011 Avis Europe Restructuring [Member] | Americas
Restructuring Reserve [Roll Forward]
Payment for Restructuring	0
2011 Avis Europe Restructuring [Member] | International
Restructuring Reserve [Roll Forward]
Payment for Restructuring	(1)
Employee Severance [Member]
Restructuring Reserve [Roll Forward]
Balance as of January 1, 2016	10
Balance as of March 31, 2016	12
Employee Severance [Member] | 2014 T15 Restructuring [Member]
Restructuring Reserve [Roll Forward]
Restructuring expense	9
Payment for Restructuring	(1)
Employee Severance [Member] | 2015 Acquisition Integration [Member]
Restructuring Reserve [Roll Forward]
Restructuring expense	3
Payment for Restructuring	(8)
Employee Severance [Member] | 2011 Avis Europe Restructuring [Member]
Restructuring Reserve [Roll Forward]
Payment for Restructuring	(1)
Facility Related [Member]
Restructuring Reserve [Roll Forward]
Balance as of January 1, 2016	1
Balance as of March 31, 2016	1
Facility Related [Member] | 2014 T15 Restructuring [Member]
Restructuring Reserve [Roll Forward]
Restructuring expense	0
Payment for Restructuring	0
Facility Related [Member] | 2015 Acquisition Integration [Member]
Restructuring Reserve [Roll Forward]
Restructuring expense	0
Payment for Restructuring	0
Facility Related [Member] | 2011 Avis Europe Restructuring [Member]
Restructuring Reserve [Roll Forward]
Payment for Restructuring	0
Other Restructuring [Member]
Restructuring Reserve [Roll Forward]
Balance as of January 1, 2016	0
Balance as of March 31, 2016	0
Other Restructuring [Member] | 2014 T15 Restructuring [Member]
Restructuring Reserve [Roll Forward]
Restructuring expense	3
Payment for Restructuring	(3)
Other Restructuring [Member] | 2015 Acquisition Integration [Member]
Restructuring Reserve [Roll Forward]
Restructuring expense	0
Payment for Restructuring	0
Other Restructuring [Member] | 2011 Avis Europe Restructuring [Member]
Restructuring Reserve [Roll Forward]
Payment for Restructuring	$ 0