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, 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 (loss):
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								(101.6)
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 (loss):
Repurchase of common stock (in shares)		(4.9)
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, 2023		$ (343)	(349)	$ 1	6,634	3,854	(96)	$ (10,742)	6
Treasury stock, beginning balance (in shares) at Dec. 31, 2023								(101.6)
Comprehensive income (loss):
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
Comprehensive income (loss):
Net income (loss)		$ (995)
Net income (loss)		(886)	(889)			(889)			3
Other comprehensive income (loss)		72	72				72
Total comprehensive income (loss)		(814)	(817)			(889)	72		3
Net activity related to restricted stock units (in shares)								0.1
Net activity related to restricted stock units		$ 15	15		2	(1)		$ 14
Repurchase of common stock (in shares)		0.0
Ending balance (in shares) at Dec. 31, 2025				137.1
Ending balance at Dec. 31, 2025		$ (3,116)	$ (3,129)	$ 1	$ 6,622	$ 1,139	$ (138)	$ (10,753)	$ 13
Treasury stock, ending balance (in shares) at Dec. 31, 2025		(102.0)						(101.9)
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.