Summary of Segments Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Segment Reporting Information [Line Items]
Net revenues	$ 7,937		$ 7,357		$ 5,900
Vehicle depreciation and lease charges, net	1,811		1,471		1,223
Vehicle interest, net	264		297		286
Adjusted EBITDA	708	[1]	802	[1]	605	[1]
Non-vehicle depreciation and amortization	152		125		95
Segment assets exclusive of assets under vehicle programs	5,832		5,119		3,848
Assets under vehicle programs	10,452		10,099		9,090
Capital expenditures (excluding vehicles)	152		132		65
North America
Segment Reporting Information [Line Items]
Net revenues	5,083		4,640		4,495
Vehicle depreciation and lease charges, net	1,262		943		969
Vehicle interest, net	204		246		263
Adjusted EBITDA	500		556		442
Non-vehicle depreciation and amortization	102		78		80
Segment assets exclusive of assets under vehicle programs	3,748		3,065		2,112
Assets under vehicle programs	7,967		7,394		6,674
Capital expenditures (excluding vehicles)	99		72		54
International
Segment Reporting Information [Line Items]
Net revenues	2,481		2,342		1,028
Vehicle depreciation and lease charges, net	501		483		209
Vehicle interest, net	48		38		11
Adjusted EBITDA	240		234		127
Non-vehicle depreciation and amortization	49		46		14
Segment assets exclusive of assets under vehicle programs	1,779		1,740		1,464
Assets under vehicle programs	2,136		2,300		2,109
Capital expenditures (excluding vehicles)	53		60		10
Truck Rental
Segment Reporting Information [Line Items]
Net revenues	373		374		376
Vehicle depreciation and lease charges, net	48		45		45
Vehicle interest, net	12		13		12
Adjusted EBITDA	15		33		49
Non-vehicle depreciation and amortization	1		1		1
Segment assets exclusive of assets under vehicle programs	80		90		88
Assets under vehicle programs	349		405		307
Capital expenditures (excluding vehicles)					1
Corporate and Other
Segment Reporting Information [Line Items]
Net revenues	0	[2]	1	[2]	1	[2]
Adjusted EBITDA	(47)	[2]	(21)	[2]	(13)	[2]
Segment assets exclusive of assets under vehicle programs	$ 225	[2]	$ 224	[2]	$ 184	[2]

[1] Adjusted EBITDA includes restructuring costs of $61 million, $38 million and $5 million for the years ended December 31, 2013, 2012 and 2011, respectively.

[2] Primarily represents unallocated corporate overhead, receivables from our former subsidiaries and debt financing fees related to our corporate debt.