Cash and Cash Equivalents and Restricted Cash and Cash Equivalents	9 Months Ended
	Sep. 30, 2012
Cash and Cash Equivalents [Abstract]
Cash and Cash Equivalents and Restricted Cash and Cash Equivalents	Cash and Cash Equivalents and Restricted Cash and Cash Equivalents We consider all highly liquid debt instruments purchased with an original maturity of three months or less to be cash equivalents. In our Consolidated Statements of Cash Flows, we net cash flows from revolving borrowings in the line item "Proceeds (payments) under the revolving lines of credit, net." Restricted cash and cash equivalents includes cash and cash equivalents that are not readily available for our normal disbursements. Restricted cash and cash equivalents are restricted for the purchase of revenue earning vehicles and other specified uses under our Fleet Debt facilities, for our Like-Kind Exchange Program, or "LKE Program," and to satisfy certain of our self-insurance regulatory reserve requirements. As of September 30, 2012 and December 31, 2011, the portion of total restricted cash and cash equivalents that was associated with our Fleet Debt facilities was $302.2 million and $213.6 million, respectively. The increase in restricted cash and cash equivalents associated with our fleet debt of $88.6 million from December 31, 2011 to September 30, 2012 was primarily related to the timing of purchases and sales of revenue earning vehicles.

The entire disclosure for cash and cash equivalent footnotes, which may include the types of deposits and money market instruments, applicable carrying amounts, restricted amounts and compensating balance arrangements. Cash and equivalents include: (1) currency on hand (2) demand deposits with banks or financial institutions (3) other kinds of accounts that have the general characteristics of demand deposits (4) short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Generally, only investments maturing within three months from the date of acquisition qualify.

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

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 6

-Section H

-Subsection 3

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Cash Equivalents

-URI http://asc.fasb.org/extlink&oid=6507016

Reference 3: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

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-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4273-108586

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 8, 9, 10

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Cash

-URI http://asc.fasb.org/extlink&oid=6506951

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

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Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

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-Subparagraph (SAB TOPIC 6.H.3)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13728-122682

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-Publisher FASB

-Name Accounting Standards Codification

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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 7

-Footnote 1

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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