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, 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:
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				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								(97.6)
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:
Repurchase of common stock (in shares)		(21.6)
Ending balance (in shares) at Dec. 31, 2024				137.1
Ending balance at Dec. 31, 2024		$ (2,317)	(2,327)	$ 1	6,620	2,029	(210)	$ (10,767)	10
Treasury stock, ending balance (in shares) at Dec. 31, 2024		(102.0)						(102.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)				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								(97.6)
Comprehensive income:
Net income (loss)		1,635	1,632			1,632			3
Other comprehensive income (loss)		5	5				5
Total comprehensive income (loss)		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
Comprehensive income:
Net income (loss)		$ (1,817)	(1,821)			(1,821)			4
Other comprehensive income (loss)		(114)	(114)				(114)
Total comprehensive income (loss)		(1,931)	(1,935)			(1,821)	(114)		4
Net activity related to restricted stock units (in shares)								0.2
Net activity related to restricted stock units		3	3		(14)	(4)		$ 21
Repurchase of common stock (in shares)	[1]							(0.6)
Repurchases of common stock	[1]	(46)	(46)					$ (46)
Ending balance (in shares) at Dec. 31, 2024				137.1
Ending balance at Dec. 31, 2024		$ (2,317)	$ (2,327)	$ 1	$ 6,620	$ 2,029	$ (210)	$ (10,767)	$ 10
Treasury stock, ending balance (in shares) at Dec. 31, 2024		(102.0)						(102.0)
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