Guarantor And Non-Guarantor Consolidating Condensed Financial Statements (Consolidating Condensed Statements Of Comprehensive Income) (Detail) (USD $) In Millions, unless otherwise specified	1 Months Ended	3 Months Ended
	Apr. 30, 2014	Mar. 31, 2014		Mar. 31, 2013
Revenues
Vehicle rental		$ 1,329		$ 1,217
Other		533		474
Net revenues		1,862		1,691
Expenses
Operating		1,000		931
Vehicle depreciation and lease charges, net		433		386
Selling, general and administrative		248		224
Vehicle interest, net		64		57
Non-vehicle related depreciation and amortization		41		34
Interest expense		56		58
Intercompany Interest Expense Income		0		0
Early extinguishment of debt	26	0		40
Transaction-related costs		8		8
Total expenses		1,857		1,748
Interest expense related to corporate debt, net:
Income (loss) before income taxes		5		(57)
Provision for (benefit from) income taxes		(1)		11
Equity in earnings (loss) of subsidiaries		0		0
Net income (loss)		4		(46)
Comprehensive income (loss)		(7)		69
Restructuring Charges		7	[1]	10	[2]
Parent Company [Member]
Revenues
Vehicle rental		0		0
Other		0		0
Net revenues		0		0
Expenses
Operating		0		2
Vehicle depreciation and lease charges, net		0		0
Selling, general and administrative		7		9
Vehicle interest, net		0		0
Non-vehicle related depreciation and amortization		0		0
Interest expense		1		1
Intercompany Interest Expense Income		(3)		(3)
Early extinguishment of debt				39
Transaction-related costs		0		0
Total expenses		5		48
Interest expense related to corporate debt, net:
Income (loss) before income taxes		(5)		(48)
Provision for (benefit from) income taxes		2		4
Equity in earnings (loss) of subsidiaries		7		(2)
Net income (loss)		4		(46)
Restructuring Charges		0		0
Subsidiary Issuers [Member]
Revenues
Vehicle rental		0		0
Other		0		0
Net revenues		0		0
Expenses
Operating		4		1
Vehicle depreciation and lease charges, net		0		0
Selling, general and administrative		4		1
Vehicle interest, net		0		0
Non-vehicle related depreciation and amortization		0		0
Interest expense		47		54
Intercompany Interest Expense Income		(3)		(11)
Early extinguishment of debt				1
Transaction-related costs		2		4
Total expenses		54		50
Interest expense related to corporate debt, net:
Income (loss) before income taxes		(54)		(50)
Provision for (benefit from) income taxes		21		20
Equity in earnings (loss) of subsidiaries		40		28
Net income (loss)		7		(2)
Comprehensive income (loss)		(11)		25
Restructuring Charges		0		0
Guarantor Subsidiaries [Member]
Revenues
Vehicle rental		916		837
Other		267		246
Net revenues		1,183		1,083
Expenses
Operating		604		558
Vehicle depreciation and lease charges, net		441		260
Selling, general and administrative		140		131
Vehicle interest, net		45		42
Non-vehicle related depreciation and amortization		27		22
Interest expense		0		0
Intercompany Interest Expense Income		1		3
Early extinguishment of debt				0
Transaction-related costs		3		1
Total expenses		1,263		1,023
Interest expense related to corporate debt, net:
Income (loss) before income taxes		(80)		60
Provision for (benefit from) income taxes		(18)		(14)
Equity in earnings (loss) of subsidiaries		138		(18)
Net income (loss)		40		28
Comprehensive income (loss)		(43)		(2)
Restructuring Charges		2		6
Non-Guarantor Subsidiaries [Member]
Revenues
Vehicle rental		413		380
Other		755		526
Net revenues		1,168		906
Expenses
Operating		392		370
Vehicle depreciation and lease charges, net		432		243
Selling, general and administrative		97		83
Vehicle interest, net		68		58
Non-vehicle related depreciation and amortization		14		12
Interest expense		8		3
Intercompany Interest Expense Income		5		11
Early extinguishment of debt				0
Transaction-related costs		3		3
Total expenses		1,024		787
Interest expense related to corporate debt, net:
Income (loss) before income taxes		144		119
Provision for (benefit from) income taxes		(6)		1
Equity in earnings (loss) of subsidiaries		0		0
Net income (loss)		138		120
Comprehensive income (loss)		(141)		(95)
Restructuring Charges		5		4
Eliminations [Member]
Revenues
Vehicle rental		0		0
Other		(489)		(298)
Net revenues		(489)		(298)
Expenses
Operating		0		0
Vehicle depreciation and lease charges, net		(440)		(117)
Selling, general and administrative		0		0
Vehicle interest, net		(49)		(43)
Non-vehicle related depreciation and amortization		0		0
Interest expense		0		0
Intercompany Interest Expense Income		0		0
Early extinguishment of debt				0
Transaction-related costs		0		0
Total expenses		(489)		(160)
Interest expense related to corporate debt, net:
Income (loss) before income taxes		0		(138)
Provision for (benefit from) income taxes		0		0
Equity in earnings (loss) of subsidiaries		(185)		(8)
Net income (loss)		(185)		(146)
Comprehensive income (loss)		195		72
Restructuring Charges		$ 0		$ 0

[1] (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.

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