Restructuring (Summary Of Changes To Restructuring-Related Liabilities) (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Restructuring Reserve [Roll Forward]
Balance as of January 1, 2016			$ 11
Restructuring expense	$ 6	$ 6	26	$ 10
Balance as of September 30, 2016	9		9
Americas
Restructuring Reserve [Roll Forward]
Balance as of January 1, 2016			1
Balance as of September 30, 2016	1		1
International
Restructuring Reserve [Roll Forward]
Balance as of January 1, 2016			10
Balance as of September 30, 2016	8		8
2014 T15 Restructuring [Member]
Restructuring Reserve [Roll Forward]
Restructuring expense			18
Payment for Restructuring			(13)
2014 T15 Restructuring [Member] | Americas
Restructuring Reserve [Roll Forward]
Restructuring expense			10
Payment for Restructuring			(9)
2014 T15 Restructuring [Member] | International
Restructuring Reserve [Roll Forward]
Restructuring expense			8
Payment for Restructuring			(4)
2015 Acquisition Integration [Member]
Restructuring Reserve [Roll Forward]
Restructuring expense			9
Payment for Restructuring			(14)
2015 Acquisition Integration [Member] | Americas
Restructuring Reserve [Roll Forward]
Restructuring expense			0
Payment for Restructuring			(1)
2015 Acquisition Integration [Member] | International
Restructuring Reserve [Roll Forward]
Restructuring expense			9
Payment for Restructuring			(13)
2011 Avis Europe Restructuring [Member]
Restructuring Reserve [Roll Forward]
Restructuring expense			(1)
Payment for Restructuring			(1)
2011 Avis Europe Restructuring [Member] | Americas
Restructuring Reserve [Roll Forward]
Restructuring expense			0
Payment for Restructuring			0
2011 Avis Europe Restructuring [Member] | International
Restructuring Reserve [Roll Forward]
Restructuring expense			(1)
Payment for Restructuring			(1)
Employee Severance [Member]
Restructuring Reserve [Roll Forward]
Balance as of January 1, 2016			10
Balance as of September 30, 2016	8		8
Employee Severance [Member] | 2014 T15 Restructuring [Member]
Restructuring Reserve [Roll Forward]
Restructuring expense			13
Payment for Restructuring			(9)
Employee Severance [Member] | 2015 Acquisition Integration [Member]
Restructuring Reserve [Roll Forward]
Restructuring expense			9
Payment for Restructuring			(14)
Employee Severance [Member] | 2011 Avis Europe Restructuring [Member]
Restructuring Reserve [Roll Forward]
Restructuring expense			0
Payment for Restructuring			(1)
Facility Related [Member]
Restructuring Reserve [Roll Forward]
Balance as of January 1, 2016			1
Balance as of September 30, 2016	1		1
Facility Related [Member] | 2014 T15 Restructuring [Member]
Restructuring Reserve [Roll Forward]
Restructuring expense			1
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]
Restructuring expense			(1)
Payment for Restructuring			0
Other Restructuring [Member]
Restructuring Reserve [Roll Forward]
Balance as of January 1, 2016			0
Balance as of September 30, 2016	$ 0		0
Other Restructuring [Member] | 2014 T15 Restructuring [Member]
Restructuring Reserve [Roll Forward]
Restructuring expense			4
Payment for Restructuring			(4)
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]
Restructuring expense			0
Payment for Restructuring			$ 0