Consolidating Condensed Balance Sheets (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 611	$ 490
Receivables, net	922	808
Other current assets	533	519
Total current assets	2,066	1,817
Property and equipment, net	704	685
Deferred income taxes	931	1,493
Goodwill	1,073	1,007	$ 973
Other intangibles, net	850	870
Other non-current assets	196	193
Intercompany receivables (payables)	0	0
Investment in subsidiaries	0	0
Total assets exclusive of assets under vehicle programs	5,820	6,065
Assets under vehicle programs:
Program cash	283	225
Vehicles, net	10,626	10,464
Receivables from vehicle manufacturers and other	547	527
Investment in Avis Budget Rental Car Funding (AESOP) LLC—related party	423	362
Assets under vehicle programs	11,879	11,578	11,716
Total assets	17,699	17,643
Current liabilities:
Short-term debt and current portion of long-term debt	26	279
Accounts payable and other current liabilities	1,619	1,488
Total current liabilities	1,645	1,767
Long-term debt	3,573	3,244
Due to Related Parties, Noncurrent	0	0
Deferred Income Taxes	1,594	2,429
Other non-current liabilities	717	764
Total liabilities exclusive of liabilities under vehicle programs	5,935	5,775
Liabilities under vehicle programs:
Debt	2,741	2,183
Due to Avis Budget Rental Car Funding (AESOP) LLC-related party	6,480	6,695
Other	376	340
Total Liabilities under vehicle programs	11,191	11,647
Total stockholders’ equity	573	221	$ 439	$ 665
Total liabilities and stockholders’ equity	17,699	17,643
Parent Company
Current assets:
Cash and cash equivalents	4	3
Receivables, net	0	0
Other current assets	4	2
Total current assets	8	5
Property and equipment, net	0	0
Deferred income taxes	14	20
Goodwill	0	0
Other intangibles, net	0	0
Other non-current assets	46	75
Intercompany receivables (payables)	187	171
Investment in subsidiaries	381	42
Total assets exclusive of assets under vehicle programs	636	313
Assets under vehicle programs:
Program cash	0	0
Vehicles, net	0	0
Receivables from vehicle manufacturers and other	0	0
Investment in Avis Budget Rental Car Funding (AESOP) LLC—related party	0	0
Assets under vehicle programs	0	0
Total assets	636	313
Current liabilities:
Short-term debt and current portion of long-term debt	0	0
Accounts payable and other current liabilities	23	23
Total current liabilities	23	23
Long-term debt	0	0
Due to Related Parties, Noncurrent	0	0
Deferred Income Taxes	0	0
Other non-current liabilities	40	69
Total liabilities exclusive of liabilities under vehicle programs	63	92
Liabilities under vehicle programs:
Debt	0	0
Due to Avis Budget Rental Car Funding (AESOP) LLC-related party	0	0
Other	0	0
Total Liabilities under vehicle programs	0	0
Total stockholders’ equity	573	221
Total liabilities and stockholders’ equity	636	313
Subsidiary Issuers
Current assets:
Cash and cash equivalents	14	12
Receivables, net	0	0
Other current assets	89	101
Total current assets	103	113
Property and equipment, net	167	148
Deferred income taxes	704	1,219
Goodwill	0	0
Other intangibles, net	27	28
Other non-current assets	29	24
Intercompany receivables (payables)	382	359
Investment in subsidiaries	4,681	3,717
Total assets exclusive of assets under vehicle programs	6,093	5,608
Assets under vehicle programs:
Program cash	0	0
Vehicles, net	34	24
Receivables from vehicle manufacturers and other	1	1
Investment in Avis Budget Rental Car Funding (AESOP) LLC—related party	0	0
Assets under vehicle programs	35	25
Total assets	6,128	5,633
Current liabilities:
Short-term debt and current portion of long-term debt	17	264
Accounts payable and other current liabilities	207	189
Total current liabilities	224	453
Long-term debt	2,910	2,730
Due to Related Parties, Noncurrent	2,515	2,306
Deferred Income Taxes	0	0
Other non-current liabilities	83	88
Total liabilities exclusive of liabilities under vehicle programs	5,732	5,577
Liabilities under vehicle programs:
Debt	15	14
Due to Avis Budget Rental Car Funding (AESOP) LLC-related party	0	0
Other	0	0
Total Liabilities under vehicle programs	15	14
Total stockholders’ equity	381	42
Total liabilities and stockholders’ equity	6,128	5,633
Guarantor Subsidiaries
Current assets:
Cash and cash equivalents	0	0
Receivables, net	255	231
Other current assets	101	90
Total current assets	356	321
Property and equipment, net	321	341
Deferred income taxes	154	268
Goodwill	471	489
Other intangibles, net	480	502
Other non-current assets	16	16
Intercompany receivables (payables)	1,506	1,466
Investment in subsidiaries	3,938	3,698
Total assets exclusive of assets under vehicle programs	7,242	7,101
Assets under vehicle programs:
Program cash	0	0
Vehicles, net	61	70
Receivables from vehicle manufacturers and other	0	0
Investment in Avis Budget Rental Car Funding (AESOP) LLC—related party	0	0
Assets under vehicle programs	61	70
Total assets	7,303	7,171
Current liabilities:
Short-term debt and current portion of long-term debt	3	3
Accounts payable and other current liabilities	552	512
Total current liabilities	555	515
Long-term debt	3	3
Due to Related Parties, Noncurrent	382	359
Deferred Income Taxes	1,407	2,258
Other non-current liabilities	216	253
Total liabilities exclusive of liabilities under vehicle programs	1,156	1,130
Liabilities under vehicle programs:
Debt	57	66
Due to Avis Budget Rental Car Funding (AESOP) LLC-related party	0	0
Other	2	0
Total Liabilities under vehicle programs	1,466	2,324
Total stockholders’ equity	4,681	3,717
Total liabilities and stockholders’ equity	7,303	7,171
Non-Guarantor Subsidiaries
Current assets:
Cash and cash equivalents	593	475
Receivables, net	667	577
Other current assets	339	326
Total current assets	1,599	1,378
Property and equipment, net	216	196
Deferred income taxes	59	0
Goodwill	602	518
Other intangibles, net	343	340
Other non-current assets	105	78
Intercompany receivables (payables)	824	670
Investment in subsidiaries	0	0
Total assets exclusive of assets under vehicle programs	3,748	3,180
Assets under vehicle programs:
Program cash	283	225
Vehicles, net	10,531	10,370
Receivables from vehicle manufacturers and other	546	526
Investment in Avis Budget Rental Car Funding (AESOP) LLC—related party	423	362
Assets under vehicle programs	11,783	11,483
Total assets	15,531	14,663
Current liabilities:
Short-term debt and current portion of long-term debt	6	12
Accounts payable and other current liabilities	837	764
Total current liabilities	843	776
Long-term debt	660	511
Due to Related Parties, Noncurrent	2	1
Deferred Income Taxes	187	171
Other non-current liabilities	378	368
Total liabilities exclusive of liabilities under vehicle programs	1,883	1,656
Liabilities under vehicle programs:
Debt	2,669	2,103
Due to Avis Budget Rental Car Funding (AESOP) LLC-related party	6,480	6,695
Other	374	340
Total Liabilities under vehicle programs	9,710	9,309
Total stockholders’ equity	3,938	3,698
Total liabilities and stockholders’ equity	15,531	14,663
Eliminations
Current assets:
Cash and cash equivalents	0	0
Receivables, net	0	0
Other current assets	0	0
Total current assets	0	0
Property and equipment, net	0	0
Deferred income taxes	0	(14)
Goodwill	0	0
Other intangibles, net	0	0
Other non-current assets	0	0
Intercompany receivables (payables)	(2,899)	(2,666)
Investment in subsidiaries	(9,000)	(7,457)
Total assets exclusive of assets under vehicle programs	(11,899)	(10,137)
Assets under vehicle programs:
Program cash	0	0
Vehicles, net	0	0
Receivables from vehicle manufacturers and other	0	0
Investment in Avis Budget Rental Car Funding (AESOP) LLC—related party	0	0
Assets under vehicle programs	0	0
Total assets	(11,899)	(10,137)
Current liabilities:
Short-term debt and current portion of long-term debt	0	0
Accounts payable and other current liabilities	0	0
Total current liabilities	0	0
Long-term debt	0	0
Due to Related Parties, Noncurrent	(2,899)	(2,666)
Deferred Income Taxes	0	0
Other non-current liabilities	0	(14)
Total liabilities exclusive of liabilities under vehicle programs	(2,899)	(2,680)
Liabilities under vehicle programs:
Debt	0	0
Due to Avis Budget Rental Car Funding (AESOP) LLC-related party	0	0
Other	0	0
Total Liabilities under vehicle programs	0	0
Total stockholders’ equity	(9,000)	(7,457)
Total liabilities and stockholders’ equity	$ (11,899)	$ (10,137)