Segment Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			6 Months Ended
	Jun. 30, 2013	Mar. 31, 2013	Jun. 30, 2012	Jun. 30, 2013		Jun. 30, 2012
Reconciliation of adjusted pre-tax income to income (loss) before income taxes
Revenues	$ 2,714.6	$ 2,714.6	$ 2,225.1	$ 5,151.2		$ 4,186.1
Adjusted Pre-Tax Income (Loss)	225.7	225.7	171.6	311.7		147.6
Increase in assets				2,640.8
Total reportable segments
Reconciliation of adjusted pre-tax income to income (loss) before income taxes
Revenues	2,713.8		2,224.6	5,149.7		4,185.0
Adjusted Pre-Tax Income (Loss)	437.1		319.9	691.3		437.4
Car Rental
Reconciliation of adjusted pre-tax income to income (loss) before income taxes
Revenues	2,329.5		1,889.6	4,414.3		3,547.9
Adjusted Pre-Tax Income (Loss)	363.0		277.4	571.4		369.0
Equipment Rental
Reconciliation of adjusted pre-tax income to income (loss) before income taxes
Revenues	384.3		335.0	735.4		637.1
Adjusted Pre-Tax Income (Loss)	74.1		42.5	119.9		68.4
Other
Reconciliation of adjusted pre-tax income to income (loss) before income taxes
Revenues	0.8		0.5	1.5		1.1
Other reconciling items
Reconciliation of adjusted pre-tax income to income (loss) before income taxes
Adjusted Pre-Tax Income (Loss)	(116.2)		(79.8)	(219.5)	[1]	(161.7)	[1]
Purchase accounting
Reconciliation of adjusted pre-tax income to income (loss) before income taxes
Adjusted Pre-Tax Income (Loss)	(33.1)		(29.0)	(66.8)	[2]	(53.0)	[2]
Non Cash debt charges
Reconciliation of adjusted pre-tax income to income (loss) before income taxes
Adjusted Pre-Tax Income (Loss)	(12.1)		(13.9)	(22.1)	[3]	(32.6)	[3]
Restructuring charges
Reconciliation of adjusted pre-tax income to income (loss) before income taxes
Adjusted Pre-Tax Income (Loss)	(17.6)		(16.1)	(21.3)		(22.8)
Restructuring related charges
Reconciliation of adjusted pre-tax income to income (loss) before income taxes
Adjusted Pre-Tax Income (Loss)	(8.6)		(5.0)	(12.8)	[4]	(8.3)	[4]
Management transition costs
Reconciliation of adjusted pre-tax income to income (loss) before income taxes
Adjusted Pre-Tax Income (Loss)	(9.2)		0	(20.0)	[5]	0	[5]
Gain (Loss) on Derivatives [Member]
Reconciliation of adjusted pre-tax income to income (loss) before income taxes
Adjusted Pre-Tax Income (Loss)	(0.1)		0	(11.7)		(11.4)
Acquisition related costs
Reconciliation of adjusted pre-tax income to income (loss) before income taxes
Adjusted Pre-Tax Income (Loss)	(9.1)		(4.5)	(5.4)	[6]	0	[6]
Acquistion Related Costs, Other [Member]
Reconciliation of adjusted pre-tax income to income (loss) before income taxes
Adjusted Pre-Tax Income (Loss)	$ (5.4)		$ 0

[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 2005 sale of all of Hertz's stock 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.

[6] Primarily represents expenses related to litigation accruals.