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	Retained Earnings (Accumulated Deficit)	Retained Earnings (Accumulated Deficit) Cumulative effect of accounting change	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Non-controlling Interests
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)					137.1
Beginning balance at Dec. 31, 2019	$ 656	$ (1)	$ 656	$ (1)	$ 1	$ 6,741	$ (785)	$ (1)	$ (157)	$ (5,144)	$ 0
Treasury stock, beginning balance (in shares) at Dec. 31, 2019										(63.2)
Comprehensive loss:
Net income (loss)	(684)						(684)
Other comprehensive income (loss)	(30)								(30)
Total comprehensive income (loss)	(714)		(714)				(684)		(30)
Non-controlling interests	(2)		(2)			(2)
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)	(36.0)									(5.0)
Repurchases of common stock	$ (113)		(113)							$ (113)
Treasury stock, ending balance (in shares) at Dec. 31, 2020										(67.3)
Ending balance (in shares) at Dec. 31, 2020					137.1
Ending balance at Dec. 31, 2020	(155)		(155)		$ 1	6,668	(1,470)		(187)	$ (5,167)	0
Beginning balance at Dec. 31, 2019	656	$ (1)	656	$ (1)	$ 1	6,741	(785)	$ (1)	(157)	$ (5,144)	0
Treasury stock, beginning balance (in shares) at Dec. 31, 2019										(63.2)
Comprehensive loss:
Repurchases of common stock	$ (4,800)
Treasury stock, ending balance (in shares) at Dec. 31, 2022	(98.0)									(97.6)
Ending balance (in shares) at Dec. 31, 2022					137.1
Ending balance at Dec. 31, 2022	$ (700)		(703)		$ 1	6,666	2,579		(101)	$ (9,848)	3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)					137.1
Beginning balance at Dec. 31, 2020	(155)		(155)		$ 1	6,668	(1,470)		(187)	$ (5,167)	0
Treasury stock, beginning balance (in shares) at Dec. 31, 2020										(67.3)
Comprehensive loss:
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)
Contributions from non-controlling interests	38		25			25					13
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)	(36.0)									(14.3)
Repurchases of common stock	$ (1,443)		(1,443)							$ (1,443)
Treasury stock, ending balance (in shares) at Dec. 31, 2021	(81.0)									(81.2)
Ending balance (in shares) at Dec. 31, 2021					137.1
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
Comprehensive loss:
Net income (loss)	2,756		2,764				2,764				(8)
Other comprehensive income (loss)	32		32						32
Total comprehensive income (loss)	2,788		2,796				2,764		32		(8)
Contributions from non-controlling interests	24		24			24
Net activity related to restricted stock units (in shares)										0.3
Net activity related to restricted stock units	$ (36)		(36)			(34)				$ (2)
Repurchase of common stock (in shares)	(36.0)									(16.7)
Repurchases of common stock	$ (3,267)		(3,267)							$ (3,267)
Treasury stock, ending balance (in shares) at Dec. 31, 2022	(98.0)									(97.6)
Ending balance (in shares) at Dec. 31, 2022					137.1
Ending balance at Dec. 31, 2022	$ (700)		$ (703)		$ 1	$ 6,666	$ 2,579		$ (101)	$ (9,848)	$ 3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)					137.1