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Income Taxes - Unrecognized Tax Benefits (Detail) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
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Income Taxes [Line Items] |  |  |  |
Unrecognized tax benefit in non-current income taxes payable | $ 30 | $ 24 |  |
Accrued interest payable on potential tax liabilities | 29 | 29 |  |
Unrecognized Tax Benefits | 58 | 57 | $ 54 | $ 61
Non Avis Budget Car Rental Tax Contingencies |  |  |  |
Income Taxes [Line Items] |  |  |  |
Unrecognized Tax Benefits | $ 13 | $ 13 |  |

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- Definition Unrecognized tax benefits, non-current income taxes payable + References No definition available. + Details
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- Definition Amount of unrecognized tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 10B -URI http://asc.fasb.org/extlink&oid=123427490&loc=SL37586934-109318 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121826272&loc=SL6600010-109319 + Details
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- Definition Amount of interest expense accrued for an underpayment of income taxes. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32718-109319 + Details
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