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
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	228	228			228
Other comprehensive income (loss)	26	26				26
Comprehensive income attributable to Avis Budget Group, Inc.	254	254			228	26		0
Net activity related to restricted stock units (in shares)							0.3
Net activity related to restricted stock units	3	3		(22)			$ 25
Repurchases of common stock (in shares)							(0.1)
Repurchases of common stock	(10)	(10)					$ (10)
Ending balance (in shares) at Jun. 30, 2021			137.1
Ending balance at Jun. 30, 2021	92	92	$ 1	6,646	(1,242)	(161)	$ (5,152)	0
Treasury stock, ending balance (in shares) at Jun. 30, 2021							(67.1)
Beginning balance (in shares) at Mar. 31, 2021			137.1
Beginning balance at Mar. 31, 2021	(316)	(316)	$ 1	6,642	(1,640)	(163)	$ (5,156)	0
Treasury stock, beginning balance (in shares) at Mar. 31, 2021							(67.2)
Comprehensive income:
Net income	398	398			398
Other comprehensive income (loss)	2	2				2
Comprehensive income attributable to Avis Budget Group, Inc.	400	400			398	2
Net activity related to restricted stock units (in shares)							0.1
Net activity related to restricted stock units	8	8		4			$ 4
Ending balance (in shares) at Jun. 30, 2021			137.1
Ending balance at Jun. 30, 2021	92	92	$ 1	6,646	(1,242)	(161)	$ (5,152)	0
Treasury stock, ending balance (in shares) at Jun. 30, 2021							(67.1)
Beginning balance (in shares) at Dec. 31, 2021			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	1,301	1,307			1,307			(6)
Other comprehensive income (loss)	3	3				3
Comprehensive income attributable to Avis Budget Group, Inc.	$ 1,304	1,310			1,307	3		(6)
Net activity related to restricted stock units (in shares)	7.9						0.3
Net activity related to restricted stock units	$ (36)	(36)		(33)			$ (3)
Repurchases of common stock (in shares)							(7.9)
Repurchases of common stock	(1,708)	(1,708)					$ (1,708)
Ending balance (in shares) at Jun. 30, 2022			137.1
Ending balance at Jun. 30, 2022	(649)	(654)	$ 1	6,643	1,122	(130)	$ (8,290)	5
Treasury stock, ending balance (in shares) at Jun. 30, 2022							(88.8)
Beginning balance (in shares) at Mar. 31, 2022			137.1
Beginning balance at Mar. 31, 2022	(983)	(992)	$ 1	6,646	344	(94)	$ (7,889)	9
Treasury stock, beginning balance (in shares) at Mar. 31, 2022							(87.4)
Comprehensive income:
Net income	774	778			778			(4)
Other comprehensive income (loss)	(36)	(36)				(36)
Comprehensive income attributable to Avis Budget Group, Inc.	738	742			778	(36)		(4)
Net activity related to restricted stock units (in shares)							0.1
Net activity related to restricted stock units	(3)	(3)		(3)
Repurchases of common stock (in shares)							(1.5)
Repurchases of common stock	(401)	(401)					$ (401)
Ending balance (in shares) at Jun. 30, 2022			137.1
Ending balance at Jun. 30, 2022	$ (649)	$ (654)	$ 1	$ 6,643	$ 1,122	$ (130)	$ (8,290)	$ 5
Treasury stock, ending balance (in shares) at Jun. 30, 2022							(88.8)