Stockholders' Equity (Components of Other Comprehensive Income) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Equity [Abstract]
Net income	$ 436	$ 774	$ 748	$ 1,301
Less: net income (loss) attributable to non-controlling interests	(1)	4	(1)	6
Net income	435	778	747	1,307
Other comprehensive income (loss):
Currency translation adjustments (net of tax of $2, $(14), $5 and $(17), respectively)	6	(50)	2	(43)
Net unrealized gain (loss) on cash flow hedges (net of tax of $(4), $(4), $(2) and $(15), respectively)	14	13	7	43
Minimum pension liability adjustment (net of tax of $0, in each period)	1	1	2	3
Other comprehensive income (loss)	21	(36)	11	3
Comprehensive income attributable to Avis Budget Group, Inc.	456	742	758	1,310
Currency translation adjustments, tax	2	(14)	5	(17)
Net unrealized gain (loss) on cash flow hedges, tax	(4)	(4)	(2)	(15)
Minimum pension liability adjustment, tax	$ 0	$ 0	$ 0	$ 0