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, 2020			137.1				(67.3)
Beginning balance at Dec. 31, 2020	$ (155)	$ (155)	$ 1	$ 6,668	$ (1,470)	$ (187)	$ (5,167)	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(170)	(170)			(170)
Other comprehensive income	24	24				24
Comprehensive income (loss) attributable to Avis Budget Group, Inc.	(146)	(146)			(170)	24
Net activity related to restricted stock units (in shares)							0.2
Net activity related to restricted stock units	(5)	(5)		(26)			$ 21
Repurchases of common stock (in shares)							(0.1)
Repurchases of common stock	(10)	(10)					$ (10)
Ending balance (in shares) at Mar. 31, 2021			137.1				(67.2)
Ending balance at Mar. 31, 2021	(316)	(316)	$ 1	6,642	(1,640)	(163)	$ (5,156)	0
Beginning balance (in shares) at Dec. 31, 2021			137.1				(81.2)
Beginning balance at Dec. 31, 2021	(209)	(220)	$ 1	6,676	(185)	(133)	$ (6,579)	11
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	527	529			529			(2)
Other comprehensive income	39	39				39
Comprehensive income (loss) attributable to Avis Budget Group, Inc.	$ 566	568			529	39		(2)
Net activity related to restricted stock units (in shares)	6.4						0.2
Net activity related to restricted stock units	$ (33)	(33)		(30)			$ (3)
Repurchases of common stock (in shares)							(6.4)
Repurchases of common stock	(1,307)	(1,307)					$ (1,307)
Ending balance (in shares) at Mar. 31, 2022			137.1				(87.4)
Ending balance at Mar. 31, 2022	$ (983)	$ (992)	$ 1	$ 6,646	$ 344	$ (94)	$ (7,889)	$ 9