Stockholders' Equity (Components of Other Comprehensive Income) (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Equity [Abstract]
Net income	$ 312	$ 527
Less: net income (loss) attributable to non-controlling interests	0	2
Net income	312	529
Other comprehensive income (loss):
Currency translation adjustments (net of tax of $3 and $(3), respectively)	(4)	7
Net unrealized gain (loss) on cash flow hedges (net of tax of $2 and $(11), respectively)	(7)	30
Minimum pension liability adjustment (net of tax of $0, in each period)	1	2
Other comprehensive income (loss)	(10)	39
Comprehensive income attributable to Avis Budget Group, Inc.	302	568
Currency translation adjustments, tax	3	(3)
Net unrealized gain (loss) on cash flow hedges, tax	2	(11)
Minimum pension liability adjustment, tax	$ 0	$ 0