CONSOLIDATED CONDENSED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Millions, $ in Millions		Total	Stockholders’ Equity Attributable to Avis Budget Group, Inc.	Common Stock	Additional Paid-in Capital	Retained Earnings (Accumulated Deficit)	Accumulated Other Comprehensive Income (Loss)	Treasury Stock		Non-controlling Interests
Beginning balance (in shares) at Dec. 31, 2021				137.1
Beginning balance at Dec. 31, 2021		$ (209)	$ (220)	$ 1	$ 6,676	$ (185)	$ (133)	$ (6,579)		$ 11
Treasury stock, beginning balance (in shares) at Dec. 31, 2021								(81.2)
Comprehensive income (loss):
Net income (loss)		2,332	2,341			2,341				(9)
Other comprehensive income (loss)		(52)	(52)				(52)
Total comprehensive income (loss)		2,280	2,289			2,341	(52)			(9)
Contributions from non-controlling interests		40	40		40
Net activity related to restricted stock units (in shares)								0.3
Net activity related to restricted stock units		(42)	(42)		(40)			$ (2)
Repurchases of common stock (in shares)								(13.2)
Repurchases of common stock		(2,576)	(2,576)					$ (2,576)
Ending balance (in shares) at Sep. 30, 2022				137.1
Ending balance at Sep. 30, 2022		(507)	(509)	$ 1	6,676	2,156	(185)	$ (9,157)		2
Treasury stock, ending balance (in shares) at Sep. 30, 2022								(94.1)
Beginning balance (in shares) at Jun. 30, 2022				137.1
Beginning balance at Jun. 30, 2022		(649)	(654)	$ 1	6,643	1,122	(130)	$ (8,290)		5
Treasury stock, beginning balance (in shares) at Jun. 30, 2022								(88.8)
Comprehensive income (loss):
Net income (loss)		1,031	1,034			1,034				(3)
Other comprehensive income (loss)		(55)	(55)				(55)
Total comprehensive income (loss)		976	979			1,034	(55)			(3)
Contributions from non-controlling interests		40	40		40
Net activity related to restricted stock units		(6)	(6)		(7)			$ 1
Repurchases of common stock (in shares)								(5.3)
Repurchases of common stock		(868)	(868)					$ (868)
Ending balance (in shares) at Sep. 30, 2022				137.1
Ending balance at Sep. 30, 2022		(507)	(509)	$ 1	6,676	2,156	(185)	$ (9,157)		2
Treasury stock, ending balance (in shares) at Sep. 30, 2022								(94.1)
Beginning balance (in shares) at Dec. 31, 2022				137.1
Beginning balance at Dec. 31, 2022		$ (700)	(703)	$ 1	6,666	2,579	(101)	$ (9,848)		3
Treasury stock, beginning balance (in shares) at Dec. 31, 2022		(98.0)						(97.6)
Comprehensive income (loss):
Net income (loss)		$ 1,375	1,373			1,373				2
Other comprehensive income (loss)		(29)	(29)				(29)
Total comprehensive income (loss)		1,346	1,344			1,373	(29)			2
Net activity related to restricted stock units (in shares)								0.3
Net activity related to restricted stock units		$ (37)	(37)		(40)			$ 3
Repurchases of common stock (in shares)		(2.9)						(2.9)	[1]
Repurchases of common stock	[1]	$ (637)	(637)					$ (637)
Ending balance (in shares) at Sep. 30, 2023				137.1
Ending balance at Sep. 30, 2023		$ (28)	(33)	$ 1	6,626	3,952	(130)	$ (10,482)		5
Treasury stock, ending balance (in shares) at Sep. 30, 2023		(100.0)						(100.2)
Beginning balance (in shares) at Jun. 30, 2023				137.1
Beginning balance at Jun. 30, 2023		$ (125)	(129)	$ 1	6,625	3,326	(90)	$ (9,991)		4
Treasury stock, beginning balance (in shares) at Jun. 30, 2023								(98.0)
Comprehensive income (loss):
Net income (loss)		627	626			626				1
Other comprehensive income (loss)		(40)	(40)				(40)
Total comprehensive income (loss)		587	586			626	(40)			1
Net activity related to restricted stock units		1	1		1
Repurchases of common stock (in shares)	[1]							(2.2)
Repurchases of common stock	[1]	(491)	(491)					$ (491)
Ending balance (in shares) at Sep. 30, 2023				137.1
Ending balance at Sep. 30, 2023		$ (28)	$ (33)	$ 1	$ 6,626	$ 3,952	$ (130)	$ (10,482)		$ 5
Treasury stock, ending balance (in shares) at Sep. 30, 2023		(100.0)						(100.2)

[1] Amount includes excise taxes due under the Inflation Reduction Act of 2022.