Guarantor And Non-Guarantor Consolidating Condensed Financial Statements (Consolidating Condensed Balance Sheets) (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018	Jun. 01, 2018	Mar. 31, 2018	Mar. 01, 2018	Dec. 31, 2017
Supplemental Guarantor Financial Information [Line Items]
Document Fiscal Year Focus	2019
Current assets:
Cash and cash equivalents	$ 540	$ 615		$ 544
Receivables, net	915	955
Other current assets	682	604
Total current assets	2,137	2,174
Property and equipment, net	737	736
Operating lease right-of-use assets	2,506	0
Deferred income taxes	1,389	1,301
Goodwill	1,086	1,092
Other intangibles, net	809	825
Other non-current assets	258	242
Intercompany receivables	0	0
Investment in subsidiaries	0	0	$ 19		$ 20
Total assets exclusive of assets under vehicle programs	8,922	6,370
Assets under vehicle programs:
Program cash	131	115		147
Vehicles, net	12,585	11,474
Receivables from vehicle manufacturers and other	627	631
Investment in Avis Budget Rental Car Funding (AESOP) LLC—related party	637	559
Total Assets under vehicle programs	13,980	12,779
Total assets	22,902	19,149
Current liabilities:
Accounts payable and other current liabilities	2,235	1,693
Short-term debt and current portion of long-term debt	23	23
Total current liabilities	2,258	1,716
Long-term debt	3,501	3,528
Long-term operating lease liabilities	2,046	0
Other non-current liabilities	739	767
Intercompany payables	0	0
Total liabilities exclusive of liabilities under vehicle programs	8,544	6,011
Liabilities under vehicle programs:
Debt	2,665	2,874
Due to Avis Budget Rental Car Funding (AESOP) LLC-related party	8,540	7,358
Deferred income taxes	1,995	1,961
Other	834	531
Total Liabilities under vehicle programs	14,034	12,724
Total stockholders’ equity	324	414		455		$ 573
Total liabilities and stockholders’ equity	22,902	19,149
Restricted Cash and Cash Equivalents	5			10
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	676	735		701		901
Non-Guarantor Subsidiaries [Member]
Current assets:
Cash and cash equivalents				518
Assets under vehicle programs:
Program cash				147
Liabilities under vehicle programs:
Restricted Cash and Cash Equivalents	4			10
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	664			675
Parent Company [Member]
Current assets:
Cash and cash equivalents	1	1
Receivables, net	0	0
Other current assets	8	5
Total current assets	9	6
Property and equipment, net	0	0
Operating lease right-of-use assets	0
Deferred income taxes	14	13
Goodwill	0	0
Other intangibles, net	0	0
Other non-current assets	48	47
Intercompany receivables	162	159
Investment in subsidiaries	148	246
Total assets exclusive of assets under vehicle programs	381	471
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
Total Assets under vehicle programs	0	0
Total assets	381	471
Current liabilities:
Accounts payable and other current liabilities	16	16
Short-term debt and current portion of long-term debt	0	0
Total current liabilities	16	16
Long-term debt	0	0
Long-term operating lease liabilities	0
Other non-current liabilities	41	41
Intercompany payables	0	0
Total liabilities exclusive of liabilities under vehicle programs	57	57
Liabilities under vehicle programs:
Debt	0	0
Due to Avis Budget Rental Car Funding (AESOP) LLC-related party	0	0
Deferred income taxes	0	0
Other	0	0
Total Liabilities under vehicle programs	0	0
Total stockholders’ equity	324	414
Total liabilities and stockholders’ equity	381	471
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	1	1		3		4
Subsidiaries [Member]
Current assets:
Cash and cash equivalents	7	12
Receivables, net	0	0
Other current assets	130	112
Total current assets	137	124
Property and equipment, net	206	199
Operating lease right-of-use assets	722
Deferred income taxes	1,095	1,015
Goodwill	0	0
Other intangibles, net	25	26
Other non-current assets	38	39
Intercompany receivables	410	404
Investment in subsidiaries	4,722	4,786
Total assets exclusive of assets under vehicle programs	7,355	6,593
Assets under vehicle programs:
Program cash	0	0
Vehicles, net	60	55
Receivables from vehicle manufacturers and other	1	2
Investment in Avis Budget Rental Car Funding (AESOP) LLC—related party	0	0
Total Assets under vehicle programs	61	57
Total assets	7,416	6,650
Current liabilities:
Accounts payable and other current liabilities	308	246
Short-term debt and current portion of long-term debt	18	18
Total current liabilities	326	264
Long-term debt	2,498	2,501
Long-term operating lease liabilities	629
Other non-current liabilities	90	87
Intercompany payables	3,700	3,524
Total liabilities exclusive of liabilities under vehicle programs	7,243	6,376
Liabilities under vehicle programs:
Debt	25	28
Due to Avis Budget Rental Car Funding (AESOP) LLC-related party	0	0
Deferred income taxes	0	0
Other	0	0
Total Liabilities under vehicle programs	25	28
Total stockholders’ equity	148	246
Total liabilities and stockholders’ equity	7,416	6,650
Restricted Cash and Cash Equivalents	1
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	8	12		23		14
Guarantor Subsidiaries [Member]
Current assets:
Cash and cash equivalents	3	1
Receivables, net	238	239
Other current assets	134	116
Total current assets	375	356
Property and equipment, net	317	319
Operating lease right-of-use assets	1,148
Deferred income taxes	206	207
Goodwill	470	471
Other intangibles, net	475	475
Other non-current assets	28	16
Intercompany receivables	2,157	2,104
Investment in subsidiaries	3,814	3,852
Total assets exclusive of assets under vehicle programs	8,990	7,800
Assets under vehicle programs:
Program cash	0	0
Vehicles, net	52	54
Receivables from vehicle manufacturers and other	82	0
Investment in Avis Budget Rental Car Funding (AESOP) LLC—related party	0	0
Total Assets under vehicle programs	134	54
Total assets	9,124	7,854
Current liabilities:
Accounts payable and other current liabilities	850	582
Short-term debt and current portion of long-term debt	2	3
Total current liabilities	852	585
Long-term debt	3	3
Long-term operating lease liabilities	960
Other non-current liabilities	242	257
Intercompany payables	410	404
Total liabilities exclusive of liabilities under vehicle programs	2,467	1,249
Liabilities under vehicle programs:
Debt	47	49
Due to Avis Budget Rental Car Funding (AESOP) LLC-related party	0	0
Deferred income taxes	1,802	1,770
Other	86	0
Total Liabilities under vehicle programs	1,935	1,819
Total stockholders’ equity	4,722	4,786
Total liabilities and stockholders’ equity	9,124	7,854
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	3	1		0		0
Subsidiaries Non Guarantor [Member]
Current assets:
Cash and cash equivalents	529	601
Receivables, net	677	716
Other current assets	410	371
Total current assets	1,616	1,688
Property and equipment, net	214	218
Operating lease right-of-use assets	636
Deferred income taxes	74	66
Goodwill	616	621
Other intangibles, net	309	324
Other non-current assets	144	140
Intercompany receivables	1,382	1,262
Investment in subsidiaries	0	0
Total assets exclusive of assets under vehicle programs	4,991	4,319
Assets under vehicle programs:
Program cash	131	115
Vehicles, net	12,473	11,365
Receivables from vehicle manufacturers and other	544	629
Investment in Avis Budget Rental Car Funding (AESOP) LLC—related party	637	559
Total Assets under vehicle programs	13,785	12,668
Total assets	18,776	16,987
Current liabilities:
Accounts payable and other current liabilities	1,061	849
Short-term debt and current portion of long-term debt	3	2
Total current liabilities	1,064	851
Long-term debt	1,000	1,024
Long-term operating lease liabilities	457
Other non-current liabilities	366	382
Intercompany payables	1	1
Total liabilities exclusive of liabilities under vehicle programs	2,888	2,258
Liabilities under vehicle programs:
Debt	2,593	2,797
Due to Avis Budget Rental Car Funding (AESOP) LLC-related party	8,540	7,358
Deferred income taxes	193	191
Other	748	531
Total Liabilities under vehicle programs	12,074	10,877
Total stockholders’ equity	3,814	3,852
Total liabilities and stockholders’ equity	18,776	16,987
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	664	721		675		883
Eliminations [Member]
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
Operating lease right-of-use assets	0
Deferred income taxes	0	0
Goodwill	0	0
Other intangibles, net	0	0
Other non-current assets	0	0
Intercompany receivables	(4,111)	(3,929)
Investment in subsidiaries	(8,684)	(8,884)
Total assets exclusive of assets under vehicle programs	(12,795)	(12,813)
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
Total Assets under vehicle programs	0	0
Total assets	(12,795)	(12,813)
Current liabilities:
Accounts payable and other current liabilities	0	0
Short-term debt and current portion of long-term debt	0	0
Total current liabilities	0	0
Long-term debt	0	0
Long-term operating lease liabilities	0
Other non-current liabilities	0	0
Intercompany payables	(4,111)	(3,929)
Total liabilities exclusive of liabilities under vehicle programs	(4,111)	(3,929)
Liabilities under vehicle programs:
Debt	0	0
Due to Avis Budget Rental Car Funding (AESOP) LLC-related party	0	0
Deferred income taxes	0	0
Other	0	0
Total Liabilities under vehicle programs	0	0
Total stockholders’ equity	(8,684)	(8,884)
Total liabilities and stockholders’ equity	(12,795)	(12,813)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 0	$ 0		$ 0		$ 0