Stockholders' Equity (Components Of Other Comprehensive Income) (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Equity [Abstract]
Net income (loss)	$ 527	$ (170)
Less: net loss attributable to non-controlling interests	2	0
Net income (loss)	529	(170)
Other comprehensive income (loss):
Currency translation adjustments (net of tax of $(3) and $(12), respectively)	7	(14)
Net unrealized gain (loss) on cash flow hedges (net of tax of $(11) and $3, respectively)	30	35
Minimum pension liability adjustment (net of tax of $0 and $0, respectively)	2	3
Other comprehensive income	39	24
Comprehensive income (loss) attributable to Avis Budget Group, Inc.	568	(146)
Currency translation adjustments, tax	(3)	(12)
Net unrealized gain (loss) on cash flow hedges, tax	(11)	3
Minimum pension liability adjustment, tax	$ 0	$ 0