Guarantor And Non-Guarantor Consolidating Condensed Financial Statements (Consolidating Condensed Balance Sheets) (Detail) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 814	$ 490	$ 985	$ 452
Receivables, net	855	808
Other current assets	750	519
Total current assets	2,419	1,817
Property and equipment, net	693	685
Deferred income taxes	1,566	1,493
Goodwill	1,065	1,007
Other intangibles, net	863	870
Other non-current assets	182	193
Intercompany receivables (payables)	0	0
Investment in subsidiaries	0	0
Total assets exclusive of assets under vehicle programs	6,788	6,065
Assets under vehicle programs:
Program cash	180	225
Vehicles, net	11,801	10,464
Receivables from vehicle manufacturers and other	709	527
Investment in Avis Budget Rental Car Funding (AESOP) LLC—related party	395	362
Total Assets under vehicle programs	13,085	11,578
Total assets	19,873	17,643
Current liabilities:
Accounts payable and other current liabilities	1,866	1,488
Long-term Debt, Current Maturities	26	279
Total current liabilities	1,892	1,767
Long-term debt	3,565	3,244
Other non-current liabilities	760	764
Due to Related Parties, Noncurrent	0	0
Total liabilities exclusive of liabilities under vehicle programs	6,217	5,775
Liabilities under vehicle programs:
Debt	3,781	2,183
Due to Avis Budget Rental Car Funding (AESOP) LLC-related party	6,785	6,695
Deferred income taxes	2,424	2,429
Other	265	340
Total Liabilities under vehicle programs	13,255	11,647
Total stockholders' equity	401	221
Total liabilities and stockholders’ equity	19,873	17,643
Parent Company [Member]
Current assets:
Cash and cash equivalents	3	3	3	4
Receivables, net	0	0
Other current assets	2	2
Total current assets	5	5
Property and equipment, net	0	0
Deferred income taxes	19	20
Goodwill	0	0
Other intangibles, net	0	0
Other non-current assets	58	75
Intercompany receivables (payables)	181	171
Investment in subsidiaries	203	42
Total assets exclusive of assets under vehicle programs	466	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
Total Assets under vehicle programs	0	0
Total assets	466	313
Current liabilities:
Accounts payable and other current liabilities	13	23
Long-term Debt, Current Maturities	0	0
Total current liabilities	13	23
Long-term debt	0	0
Other non-current liabilities	52	69
Due to Related Parties, Noncurrent	0	0
Total liabilities exclusive of liabilities under vehicle programs	65	92
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	401	221
Total liabilities and stockholders’ equity	466	313
Subsidiaries [Member]
Current assets:
Cash and cash equivalents	17	12	526	70
Receivables, net	0	0
Other current assets	87	101
Total current assets	104	113
Property and equipment, net	164	148
Deferred income taxes	1,248	1,219
Goodwill	0	0
Other intangibles, net	27	28
Other non-current assets	24	24
Intercompany receivables (payables)	376	359
Investment in subsidiaries	4,126	3,717
Total assets exclusive of assets under vehicle programs	6,069	5,608
Assets under vehicle programs:
Program cash	0	0
Vehicles, net	22	24
Receivables from vehicle manufacturers and other	1	1
Investment in Avis Budget Rental Car Funding (AESOP) LLC—related party	0	0
Total Assets under vehicle programs	23	25
Total assets	6,092	5,633
Current liabilities:
Accounts payable and other current liabilities	236	189
Long-term Debt, Current Maturities	17	264
Total current liabilities	253	453
Long-term debt	2,911	2,730
Other non-current liabilities	84	88
Due to Related Parties, Noncurrent	2,634	2,306
Total liabilities exclusive of liabilities under vehicle programs	5,882	5,577
Liabilities under vehicle programs:
Debt	7	14
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	7	14
Total stockholders' equity	203	42
Total liabilities and stockholders’ equity	6,092	5,633
Guarantor Subsidiaries [Member]
Current assets:
Cash and cash equivalents	0	0	0	0
Receivables, net	248	231
Other current assets	116	90
Total current assets	364	321
Property and equipment, net	321	341
Deferred income taxes	272	268
Goodwill	489	489
Other intangibles, net	486	502
Other non-current assets	18	16
Intercompany receivables (payables)	1,552	1,466
Investment in subsidiaries	4,064	3,698
Total assets exclusive of assets under vehicle programs	7,566	7,101
Assets under vehicle programs:
Program cash	0	0
Vehicles, net	64	70
Receivables from vehicle manufacturers and other	1	0
Investment in Avis Budget Rental Car Funding (AESOP) LLC—related party	0	0
Total Assets under vehicle programs	65	70
Total assets	7,631	7,171
Current liabilities:
Accounts payable and other current liabilities	587	512
Long-term Debt, Current Maturities	3	3
Total current liabilities	590	515
Long-term debt	4	3
Other non-current liabilities	227	253
Due to Related Parties, Noncurrent	376	359
Total liabilities exclusive of liabilities under vehicle programs	1,197	1,130
Liabilities under vehicle programs:
Debt	60	66
Due to Avis Budget Rental Car Funding (AESOP) LLC-related party	0	0
Deferred income taxes	2,247	2,258
Other	1	0
Total Liabilities under vehicle programs	2,308	2,324
Total stockholders' equity	4,126	3,717
Total liabilities and stockholders’ equity	7,631	7,171
Subsidiaries Non Guarantor [Member]
Current assets:
Cash and cash equivalents	794	475	456	378
Receivables, net	607	577
Other current assets	545	326
Total current assets	1,946	1,378
Property and equipment, net	208	196
Deferred income taxes	27	0
Goodwill	576	518
Other intangibles, net	350	340
Other non-current assets	82	78
Intercompany receivables (payables)	903	670
Investment in subsidiaries	0	0
Total assets exclusive of assets under vehicle programs	4,092	3,180
Assets under vehicle programs:
Program cash	180	225
Vehicles, net	11,715	10,370
Receivables from vehicle manufacturers and other	707	526
Investment in Avis Budget Rental Car Funding (AESOP) LLC—related party	395	362
Total Assets under vehicle programs	12,997	11,483
Total assets	17,089	14,663
Current liabilities:
Accounts payable and other current liabilities	1,030	764
Long-term Debt, Current Maturities	6	12
Total current liabilities	1,036	776
Long-term debt	650	511
Other non-current liabilities	397	368
Due to Related Parties, Noncurrent	2	1
Total liabilities exclusive of liabilities under vehicle programs	2,085	1,656
Liabilities under vehicle programs:
Debt	3,714	2,103
Due to Avis Budget Rental Car Funding (AESOP) LLC-related party	6,785	6,695
Deferred income taxes	177	171
Other	264	340
Total Liabilities under vehicle programs	10,940	9,309
Total stockholders' equity	4,064	3,698
Total liabilities and stockholders’ equity	17,089	14,663
Eliminations [Member]
Current assets:
Cash and cash equivalents	0	0	$ 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)	(3,012)	(2,666)
Investment in subsidiaries	(8,393)	(7,457)
Total assets exclusive of assets under vehicle programs	(11,405)	(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
Total Assets under vehicle programs	0	0
Total assets	(11,405)	(10,137)
Current liabilities:
Accounts payable and other current liabilities	0	0
Long-term Debt, Current Maturities	0	0
Total current liabilities	0	0
Long-term debt	0	0
Other non-current liabilities	0	(14)
Due to Related Parties, Noncurrent	(3,012)	(2,666)
Total liabilities exclusive of liabilities under vehicle programs	(3,012)	(2,680)
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	(8,393)	(7,457)
Total liabilities and stockholders’ equity	$ (11,405)	$ (10,137)