Pro Forma Summary of Acquisition (Detail) (Avis Europe, USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2011
Avis Europe
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Net revenues	$ 7,259
Net income	$ 22
Earnings per share - Diluted	$ 0.17

The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(2)-(3)

-URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463

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