Restructuring (Summary Of Changes To Restructuring-Related Liabilities) (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Restructuring Reserve [Roll Forward]
September 30, 2015			$ 17
Restructuring expense	$ 6	$ 8	10	$ 16
Balance as of September 30, 2015	8		8
Americas
Restructuring Reserve [Roll Forward]
September 30, 2015			4
Balance as of September 30, 2015	1		1
International
Restructuring Reserve [Roll Forward]
September 30, 2015			13
Balance as of September 30, 2015	7		7
Personnel Related
Restructuring Reserve [Roll Forward]
September 30, 2015			14
Balance as of September 30, 2015	6		6
Facility Related
Restructuring Reserve [Roll Forward]
September 30, 2015			3
Balance as of September 30, 2015	$ 2		2
2014 T15 Restructuring [Member]
Restructuring Reserve [Roll Forward]
Restructuring expense			9
Payment for Restructuring			(11)
2014 T15 Restructuring [Member] | Americas
Restructuring Reserve [Roll Forward]
Restructuring expense			6
Payment for Restructuring			(8)
2014 T15 Restructuring [Member] | International
Restructuring Reserve [Roll Forward]
Restructuring expense			3
Payment for Restructuring			(3)
2014 T15 Restructuring [Member] | Personnel Related
Restructuring Reserve [Roll Forward]
Restructuring expense			9
Payment for Restructuring			(11)
2014 T15 Restructuring [Member] | Facility Related
Restructuring Reserve [Roll Forward]
Restructuring expense			0
Payment for Restructuring			0
2015 Acquisition Integration [Member]
Restructuring Reserve [Roll Forward]
Restructuring expense			1
Payment for Restructuring			(1)
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			1
Payment for Restructuring			(1)
2015 Acquisition Integration [Member] | Personnel Related
Restructuring Reserve [Roll Forward]
Restructuring expense			1
Payment for Restructuring			(1)
2015 Acquisition Integration [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)