Income Taxes - Unrecognized Tax Benefits (Detail) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Taxes [Line Items]
Unrecognized tax benefit in non-current income taxes payable	$ 33	$ 30
Accrued interest payable on potential tax liabilities	31	29
Unrecognized tax benefits	53	58	$ 57	$ 54
Non Avis Budget Car Rental Tax Contingencies
Income Taxes [Line Items]
Unrecognized tax benefits	$ 13	$ 13