Restructuring (Summary Of Changes To Restructuring-Related Liabilities) (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Restructuring Reserve [Roll Forward]
June 30, 2015			$ 17
Restructuring expense	$ 3	$ 1	4	$ 8
Balance as of June 30, 2015	9		9
Americas
Restructuring Reserve [Roll Forward]
June 30, 2015			4
Balance as of June 30, 2015	2		2
International
Restructuring Reserve [Roll Forward]
June 30, 2015			13
Balance as of June 30, 2015	7		7
Personnel Related
Restructuring Reserve [Roll Forward]
June 30, 2015			14
Balance as of June 30, 2015	7		7
Facility Related
Restructuring Reserve [Roll Forward]
June 30, 2015			3
Balance as of June 30, 2015	$ 2		2
2014 T15 Restructuring [Member]
Restructuring Reserve [Roll Forward]
Restructuring expense			4
Payment for Restructuring			(5)
2014 T15 Restructuring [Member] | Americas
Restructuring Reserve [Roll Forward]
Restructuring expense			2
Payment for Restructuring			(3)
2014 T15 Restructuring [Member] | International
Restructuring Reserve [Roll Forward]
Restructuring expense			2
Payment for Restructuring			(2)
2014 T15 Restructuring [Member] | Personnel Related
Restructuring Reserve [Roll Forward]
Restructuring expense			4
Payment for Restructuring			(5)
2014 T15 Restructuring [Member] | Facility Related
Restructuring Reserve [Roll Forward]
Restructuring expense			0
Payment for Restructuring			0
2011 Avis Europe Restructuring [Member]
Restructuring Reserve [Roll Forward]
Payment for Restructuring			(7)
2011 Avis Europe Restructuring [Member] | Americas
Restructuring Reserve [Roll Forward]
Payment for Restructuring			(1)
2011 Avis Europe Restructuring [Member] | International
Restructuring Reserve [Roll Forward]
Payment for Restructuring			(6)
2011 Avis Europe Restructuring [Member] | Personnel Related
Restructuring Reserve [Roll Forward]
Payment for Restructuring			(6)
2011 Avis Europe Restructuring [Member] | Facility Related
Restructuring Reserve [Roll Forward]
Payment for Restructuring			$ (1)