DERIVATIVE FINANCIAL INSTRUMENTS - DOLLAR THRIFTY (Details) (Dollar Thrifty Automotive Group Inc., USD $) In Millions, unless otherwise specified	0 Months Ended	12 Months Ended
Dec. 28, 2011 Asset-backed medium term notes	Dec. 31, 2011 Interest rate swaps	Dec. 31, 2011 Interest rate swaps Asset-backed medium term notes	Sep. 30, 2012 Interest rate caps 2010-3 VFN	Dec. 31, 2011 Interest rate caps 2010-3 VFN
Derivative financial instruments
Notional amount of interest rate derivatives			$ 500	$ 600	$ 600
Swap agreements termination fee	$ 8.8	$ 8.8

Aggregate notional amount of interest rate derivatives, which relates to the currency amount specified in the interest rate derivative instruments.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 1A

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5579245-113959

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Notional Amount

-URI http://asc.fasb.org/extlink&oid=6519104

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 1B

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5580258-113959

Name:	us-gaap_NotionalAmountOfInterestRateDerivatives
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant