CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - USD ($) shares in Millions, $ in Millions	Total	Cumulative effect of accounting change	Stockholders’ Equity Attributable to Avis Budget Group, Inc.	Stockholders’ Equity Attributable to Avis Budget Group, Inc. Cumulative effect of accounting change	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Deficit Cumulative effect of accounting change	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) Cumulative effect of accounting change	Treasury Stock	Non-controlling Interests
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)					137.1						(61.5)
Beginning balance at Dec. 31, 2018	$ 414	$ 5	$ 414	$ 5	$ 1	$ 6,771	$ (1,091)	$ 4	$ (133)	$ 1	$ (5,134)	$ 0
Comprehensive income:
Net income (loss)	302						302
Other comprehensive income (loss)	(25)								(25)
Total comprehensive income (loss)	277		277				302		(25)
Net activity related to restricted stock units (in shares)											0.4
Net activity related to restricted stock units	22		22			(24)					$ 46
Exercise of stock options (in shares)											0.1
Exercise of stock options	0					(5)					$ 5
Activity related to employee stock purchase plan	0					(1)					$ 1
Repurchase of common stock (in shares)											(2.2)
Repurchase of common stock	(62)		(62)								$ (62)
Ending balance (in shares) at Dec. 31, 2019					137.1						(63.2)
Ending balance at Dec. 31, 2019	656	(1)	656	(1)	$ 1	6,741	(785)	(1)	(157)		$ (5,144)	0
Beginning balance at Dec. 31, 2018	$ 414	5	414	5	$ 1	6,771	(1,091)	4	(133)	$ 1	$ (5,134)	0
Comprehensive income:
Repurchase of common stock (in shares)	(21.5)
Repurchase of common stock	$ (1,600)
Ending balance (in shares) at Dec. 31, 2021					137.1						(81.2)
Ending balance at Dec. 31, 2021	(209)		(220)		$ 1	6,676	(185)		(133)		$ (6,579)	11
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)					137.1						(63.2)
Beginning balance at Dec. 31, 2019	656	$ (1)	656	$ (1)	$ 1	6,741	(785)	$ (1)	(157)		$ (5,144)	0
Comprehensive income:
Net income (loss)	(684)						(684)
Other comprehensive income (loss)	(30)								(30)
Total comprehensive income (loss)	(714)		(714)				(684)		(30)
Net activity related to restricted stock units (in shares)											0.5
Net activity related to restricted stock units	4		4			(50)					$ 54
Activity related to employee stock purchase plan	0					(1)					$ 1
Issuance of common stock (in shares)											0.4
Issuance of common stock	15		15			(20)					$ 35
Repurchase of common stock (in shares)											(5.0)
Repurchase of common stock	(113)		(113)								$ (113)
Non-controlling interests	(2)		(2)			(2)
Ending balance (in shares) at Dec. 31, 2020					137.1						(67.3)
Ending balance at Dec. 31, 2020	(155)		(155)		$ 1	6,668	(1,470)		(187)		$ (5,167)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)					137.1						(67.3)
Comprehensive income:
Net income (loss)	1,283						1,285					(2)
Other comprehensive income (loss)	54								54
Total comprehensive income (loss)	1,337		1,339				1,285		54			(2)
Net activity related to restricted stock units (in shares)											0.4
Net activity related to restricted stock units	14		14			(17)					$ 31
Repurchase of common stock (in shares)											(14.3)
Repurchase of common stock	(1,443)		(1,443)								$ (1,443)
Contributions from non-controlling interests	38		25			25						13
Ending balance (in shares) at Dec. 31, 2021					137.1						(81.2)
Ending balance at Dec. 31, 2021	$ (209)		$ (220)		$ 1	$ 6,676	$ (185)		$ (133)		$ (6,579)	$ 11
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)					137.1						(81.2)