CONSOLIDATED 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
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 income:
Net income		1,283				1,285			(2)
Other comprehensive income		54					54
Total comprehensive income		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)								(14.3)
Repurchases of common stock		(1,443)	(1,443)					$ (1,443)
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
Treasury stock, ending balance (in shares) at Dec. 31, 2021								(81.2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)				137.1
Comprehensive income:
Net income		2,756	2,764			2,764			(8)
Other comprehensive income		32	32				32
Total comprehensive income		2,788	2,796			2,764	32		(8)
Contributions from non-controlling interests		24	24		24				0
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)								(16.7)
Repurchases of common stock		(3,267)	(3,267)					$ (3,267)
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
Treasury stock, ending balance (in shares) at Dec. 31, 2022		(98.0)						(97.6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)				137.1
Comprehensive income:
Net income		$ 1,635	1,632			1,632			3
Other comprehensive income		5	5				5
Total comprehensive income		1,640	1,637			1,632	5		3
Net activity related to restricted stock units (in shares)								0.3
Net activity related to restricted stock units		(31)	(31)		(32)	(2)		$ 3
Repurchase of common stock (in shares)	[1]							(4.3)
Repurchases of common stock	[1]	(897)	(897)					$ (897)
Dividends paid		(355)	(355)			(355)
Ending balance (in shares) at Dec. 31, 2023				137.1
Ending balance at Dec. 31, 2023		$ (343)	$ (349)	$ 1	$ 6,634	$ 3,854	$ (96)	$ (10,742)	$ 6
Treasury stock, ending balance (in shares) at Dec. 31, 2023		(102.0)						(101.6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)				137.1

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