Stockholders' Equity (Components of Other Comprehensive Income) (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Equity [Abstract]
Net income	$ 1,031	$ 674	$ 2,332	$ 902
Less: net loss attributable to non-controlling interests	3	1	9	1
Net income	1,034	675	2,341	903
Other comprehensive income (loss):
Currency translation adjustments (net of tax of $(16), $(6), $(33) and $(15), respectively)	(78)	(23)	(121)	(22)
Net unrealized gain (loss) on cash flow hedges (net of tax of $(8), $(2), $(23) and $(9), respectively)	22	6	65	27
Minimum pension liability adjustment (net of tax of $0, $(1), $0 and $(1), respectively)	1	2	4	6
Other comprehensive income (loss)	(55)	(15)	(52)	11
Comprehensive income attributable to Avis Budget Group, Inc.	979	660	2,289	914
Currency translation adjustments, tax	(16)	(6)	(33)	(15)
Net unrealized gain (loss) on cash flow hedges, tax	(8)	(2)	(23)	(9)
Minimum pension liability adjustment, tax	$ 0	$ (1)	$ 0	$ (1)