Segment Information (Narrative) (Detail) (USD $) In Millions, unless otherwise specified	1 Months Ended	3 Months Ended
	Apr. 30, 2014	Mar. 31, 2014		Mar. 31, 2013		Dec. 31, 2013
Segment Reporting Information [Line Items]
Sales Revenue, Services, Net		$ 1,862		$ 1,691
Adjusted EBITDA		117	[1]	93	[1]
Non Vehicle Related Depreciation And Amortization		41		34
Interest expense		56		58
Early extinguishment of debt	26	0		40
Transaction-related costs		8		8
Restructuring expense		7	[2]	10	[3]
Assets under vehicle programs		11,323				10,452
Non current deferred tax assets		1,264				1,299
Loss before income taxes		5		(57)
North America
Segment Reporting Information [Line Items]
Sales Revenue, Services, Net		1,236		1,098
Adjusted EBITDA		114		93
Restructuring expense		1
Assets under vehicle programs		8,800		7,900
International
Segment Reporting Information [Line Items]
Sales Revenue, Services, Net		551		517
Adjusted EBITDA		17		17
Restructuring expense		6
Truck Rental [Member]
Segment Reporting Information [Line Items]
Sales Revenue, Services, Net		75		76
Adjusted EBITDA		(2)		(5)
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Sales Revenue, Services, Net		0	[3]	0	[3]
Adjusted EBITDA		$ (12)	[3]	$ (12)	[3]

[1] (b) Amounts reflect the revised definition of Adjusted EBITDA to exclude restructuring expense, which resulted in an increase in Adjusted EBITDA in North America, International and Truck Rental of $3 million, $3 million and $4 million, respectively, in the three months ended March 31, 2013. The realignment of the Company's operating segments had no effect on Adjusted EBITDA for the three months ended March 31, 2013.

[2] (d) During the three months ended March 31, 2014, transaction-related costs primarily comprised of a non-cash charge for re-acquired license rights and acquisition integration expenses. During the three months ended March 31, 2013, transaction-related costs primarily related to the integration of Avis Europe and the acquisition of Zipcar.

[3] (c) Includes unallocated corporate overhead which is not attributable to a particular segment.