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Unrecognized Tax Benefits Additional Information (Detail) - USD ($) $ in Millions | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
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Income Taxes [Line Items] |  |  |  |
Unrecognized tax benefits, non-current income taxes payable | $ 37 | $ 45 |  |
Unrecognized Tax Benefits, Interest on Income Taxes Accrued | 28 | 30 |  |
Unrecognized Tax Benefits | 56 | 63 | $ 63 | $ 54
Non Avis Budget Car Rental Tax Contingencies |  |  |  |
Income Taxes [Line Items] |  |  |  |
Unrecognized Tax Benefits | $ 15 | $ 16 |  |

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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 pertaining to uncertain tax positions taken in tax returns. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Unrecognized Tax Benefit -URI http://asc.fasb.org/extlink&oid=6527854 + Details
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- Definition Amount of interest expense accrued for an underpayment of income taxes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 + Details
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