Segment Information (Details) (USD $)	3 Months Ended
	Mar. 31, 2013 segment		Mar. 31, 2012
Reconciliation of adjusted pre-tax income to income (loss) before income taxes
Number of reportable segments	2
Revenues	$ 2,436,508,000		$ 1,960,925,000
Adjustments:
Adjusted Pre-Tax Income (Loss)	72,232,000		(36,809,000)
Increase in assets	(790,200,000)
Total reportable segments
Reconciliation of adjusted pre-tax income to income (loss) before income taxes
Revenues	2,435,800,000		1,960,300,000
Adjustments:
Adjusted Pre-Tax Income (Loss)	254,200,000		117,500,000
Car Rental
Reconciliation of adjusted pre-tax income to income (loss) before income taxes
Revenues	2,084,800,000		1,658,200,000
Adjustments:
Adjusted Pre-Tax Income (Loss)	208,400,000		91,600,000
Equipment Rental
Reconciliation of adjusted pre-tax income to income (loss) before income taxes
Revenues	351,000,000		302,100,000
Adjustments:
Adjusted Pre-Tax Income (Loss)	45,800,000		25,900,000
Other
Reconciliation of adjusted pre-tax income to income (loss) before income taxes
Revenues	700,000		600,000
Other reconciling items
Adjustments:
Adjusted Pre-Tax Income (Loss)	(109,700,000)	[1]	(88,100,000)	[1]
Purchase accounting
Adjustments:
Adjusted Pre-Tax Income (Loss)	(33,700,000)	[2]	(24,100,000)	[2]
Non Cash debt charges
Adjustments:
Adjusted Pre-Tax Income (Loss)	(17,300,000)	[3]	(25,200,000)	[3]
Restructuring charges
Adjustments:
Adjusted Pre-Tax Income (Loss)	(3,700,000)		(6,700,000)
Restructuring related charges
Adjustments:
Adjusted Pre-Tax Income (Loss)	(4,200,000)	[4]	(3,300,000)	[4]
Management transition costs
Adjustments:
Adjusted Pre-Tax Income (Loss)	(10,800,000)	[5]	0	[5]
Acquisition related costs
Adjustments:
Adjusted Pre-Tax Income (Loss)	$ (2,600,000)		$ (6,900,000)

[1] Represents general corporate expenses, certain interest expense (including net interest on corporate debt), as well as other business activities.

[2] Represents the purchase accounting effects of the Acquisition on our results of operations relating to increased depreciation and amortization of tangible and intangible assets and accretion of revalued workers' compensation and public liability and property damage liabilities. Also represents the purchase accounting effects of certain subsequent acquisitions on our results of operations relating to increased depreciation and amortization of tangible and intangible assets.

[3] Represents non-cash debt charges relating to the amortization and write-off of deferred debt financing costs and debt discounts.

[4] Represents incremental costs incurred directly supporting our business transformation initiatives. Such costs include transition costs incurred in connection with our business process outsourcing arrangements and incremental costs incurred to facilitate business process re-engineering initiatives that involve significant organization redesign and extensive operational process changes.

[5] Primarily represents Dollar Thrifty related expenses and adjustments.