CONDENSED 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
Beginning balance (in shares) at Dec. 31, 2023			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)	140	137			137			3
Other comprehensive income (loss)	(16)	(16)				(16)
Total comprehensive income (loss)	124	121			137	(16)		3
Contributions from non-controlling interests								12
Net activity related to restricted stock units (in shares)							0.2
Net activity related to restricted stock units	$ (2)	(2)		(19)	(3)		$ 20
Repurchases of common stock (in shares)	(0.1)						(0.1)
Repurchases of common stock	$ (8)	(8)					$ (8)
Ending balance (in shares) at Sep. 30, 2024			137.1
Ending balance at Sep. 30, 2024	(229)	(238)	$ 1	6,615	3,988	(112)	$ (10,730)	9
Treasury stock, ending balance (in shares) at Sep. 30, 2024							(101.5)
Beginning balance (in shares) at Jun. 30, 2024			137.1
Beginning balance at Jun. 30, 2024	(482)	(490)	$ 1	6,616	3,751	(135)	$ (10,723)	8
Treasury stock, beginning balance (in shares) at Jun. 30, 2024							(101.4)
Comprehensive income (loss):
Net income (loss)	238	237			237			1
Other comprehensive income (loss)	23	23				23
Total comprehensive income (loss)	261	260			237	23		1
Net activity related to restricted stock units	0	0		(1)			$ 1
Repurchases of common stock (in shares)							(0.1)
Repurchases of common stock	(8)	(8)					$ (8)
Ending balance (in shares) at Sep. 30, 2024			137.1
Ending balance at Sep. 30, 2024	(229)	(238)	$ 1	6,615	3,988	(112)	$ (10,730)	9
Treasury stock, ending balance (in shares) at Sep. 30, 2024							(101.5)
Beginning balance (in shares) at Dec. 31, 2024			137.1
Beginning balance at Dec. 31, 2024	$ (2,317)	(2,327)	$ 1	6,620	2,029	(210)	$ (10,767)	10
Treasury stock, beginning balance (in shares) at Dec. 31, 2024	(102.0)						(102.0)
Comprehensive income (loss):
Net income (loss)	$ (139)	(142)			(142)			3
Other comprehensive income (loss)	57	57				57
Total comprehensive income (loss)	(82)	(85)			(142)	57		3
Contributions from non-controlling interests	12
Net activity related to restricted stock units (in shares)							0.1
Net activity related to restricted stock units	$ 13	13		3	(1)		$ 11
Repurchases of common stock (in shares)	0.0
Ending balance (in shares) at Sep. 30, 2025			137.1
Ending balance at Sep. 30, 2025	$ (2,374)	(2,399)	$ 1	6,623	1,886	(153)	$ (10,756)	25
Treasury stock, ending balance (in shares) at Sep. 30, 2025	(102.0)						(101.9)
Beginning balance (in shares) at Jun. 30, 2025			137.1
Beginning balance at Jun. 30, 2025	$ (2,733)	(2,745)	$ 1	6,618	1,528	(135)	$ (10,757)	12
Treasury stock, beginning balance (in shares) at Jun. 30, 2025							(101.9)
Comprehensive income (loss):
Net income (loss)	360	359			359			1
Other comprehensive income (loss)	(18)	(18)				(18)
Total comprehensive income (loss)	342	341			359	(18)		1
Contributions from non-controlling interests	12							12
Net activity related to restricted stock units (in shares)							0.0
Net activity related to restricted stock units	5	5		5	(1)		$ 1
Ending balance (in shares) at Sep. 30, 2025			137.1
Ending balance at Sep. 30, 2025	$ (2,374)	$ (2,399)	$ 1	$ 6,623	$ 1,886	$ (153)	$ (10,756)	$ 25
Treasury stock, ending balance (in shares) at Sep. 30, 2025	(102.0)						(101.9)