Segment Information (Summary Of Segments Information) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
Segment Reporting Information [Line Items]
Restructuring expense	$ 15		$ 12		$ 25		$ 19
Revenues	2,002		1,866		3,693		3,489
Adjusted EBITDA	164	[1]	254	[1]	247	[2]	366	[2]
Non-vehicle related depreciation and amortization	37		29		71		62
Interest expense	55		69		114		142
Early extinguishment of debt	91		23		131		50
Loss before income taxes	(38)		129		(95)		102
Transaction-related costs	19	[3]	4	[3]	26	[4]	10	[4]
North America [Member]
Segment Reporting Information [Line Items]
Restructuring expense					3
Revenues	1,292		1,184		2,392		2,222
Adjusted EBITDA	114		184		205		277
International [Member]
Segment Reporting Information [Line Items]
Restructuring expense					9
Revenues	608		579		1,123		1,089
Adjusted EBITDA	53		59		67		81
Truck Rental [Member]
Segment Reporting Information [Line Items]
Restructuring expense					13
Revenues	102		103		178		177
Adjusted EBITDA	8		17		(2)		18
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Revenues	0	[5]	0	[5]	0	[5]	1	[5]
Adjusted EBITDA	$ (11)	[5]	$ (6)	[5]	$ (23)	[5]	$ (10)	[5]

[1] Adjusted EBITDA for the three months ended June 30, 2013 and 2012, includes $15 million and $12 million, respectively, of restructuring expense.

[2] Adjusted EBITDA for the six months ended June 30, 2013 and 2012, includes $25 million and $19 million, respectively, of restructuring expense.

[3] During the three months ended June 30, 2013, the Company incurred $19 million in transaction-related costs related to the integration of the operations of Avis Europe and costs related to the acquisition and integration of Zipcar. During the three months ended June 30, 2012, the Company incurred $4 million in transaction-related costs related to the integration of the operations of Avis Europe.

[4] During the six months ended June 30, 2013, the Company incurred $26 million in transaction-related costs related to the integration of the operations of Avis Europe and costs related to the acquisition and integration of Zipcar. During the six months ended June 30, 2012, the Company incurred $10 million in transaction-related costs related to the integration of the operations of Avis Europe.

[5] Includes unallocated corporate overhead and the elimination of transactions between segments.