Debt (Details)	9 Months Ended													1 Months Ended																1 Months Ended	9 Months Ended		9 Months Ended
	Sep. 30, 2012 USD ($)	Dec. 31, 2011 USD ($)	Sep. 30, 2012 Letters of credit USD ($)	Sep. 30, 2012 Corporate Debt USD ($)	Dec. 31, 2011 Corporate Debt USD ($)	Sep. 30, 2012 Senior credit facility USD ($)	Sep. 30, 2012 Senior credit facility Letters of credit USD ($)	Sep. 30, 2012 Senior Term Facility USD ($)	Dec. 31, 2011 Senior Term Facility USD ($)	Sep. 30, 2012 Senior ABL Facility USD ($)	Dec. 31, 2011 Senior ABL Facility USD ($)	Sep. 30, 2012 Senior ABL Facility Minimum	Sep. 30, 2012 Senior ABL Facility Letters of credit USD ($)	Mar. 31, 2012 Senior Notes USD ($)	Sep. 30, 2012 Senior Notes USD ($)		Dec. 31, 2011 Senior Notes USD ($)		Sep. 30, 2012 8.875% Senior Notes due January 2014 USD ($)	Feb. 29, 2012 8.875% Senior Notes due January 2014	Dec. 31, 2011 8.875% Senior Notes due January 2014 USD ($)	Sep. 30, 2012 7.875% Senior Notes due January 2014 USD ($)	Feb. 29, 2012 7.875% Senior Notes due January 2014	Dec. 31, 2011 7.875% Senior Notes due January 2014 USD ($)	Dec. 31, 2011 7.875% Senior Notes due January 2014 EUR (€)	Sep. 30, 2012 7.50% Senior Notes due October 2018 USD ($)	Dec. 31, 2011 7.50% Senior Notes due October 2018 USD ($)	Sep. 30, 2012 7.375% Senior Notes due January 2021 USD ($)	Dec. 31, 2011 7.375% Senior Notes due January 2021 USD ($)	Mar. 31, 2012 6.75% Senior Notes due April 2019 USD ($)	Sep. 30, 2012 6.75% Senior Notes due April 2019 USD ($)	Dec. 31, 2011 6.75% Senior Notes due April 2019 USD ($)	Sep. 30, 2012 6.75% Senior Notes due April 2019 Maximum	Sep. 30, 2012 Promissory Notes USD ($)	Dec. 31, 2011 Promissory Notes USD ($)	Sep. 30, 2012 Other Corporate Debt USD ($)	Dec. 31, 2011 Other Corporate Debt USD ($)	Sep. 30, 2012 Fleet debt USD ($)	Dec. 31, 2011 Fleet debt USD ($)	Sep. 30, 2012 U.S. ABS Program Letters of credit USD ($)	Sep. 30, 2012 U.S. Fleet Variable Funding Notes USD ($)	Dec. 31, 2011 U.S. Fleet Variable Funding Notes USD ($)	Sep. 30, 2012 U.S. Fleet Variable Funding Notes Series 2009-1 USD ($)		May 31, 2012 U.S. Fleet Variable Funding Notes Series 2009-1 USD ($)	Mar. 31, 2012 U.S. Fleet Variable Funding Notes Series 2009-1 USD ($)	Dec. 31, 2011 U.S. Fleet Variable Funding Notes Series 2009-1 USD ($)		Sep. 30, 2012 U.S. Fleet Variable Funding Notes Series 2010-2 USD ($)		Dec. 31, 2011 U.S. Fleet Variable Funding Notes Series 2010-2 USD ($)		Sep. 30, 2012 U.S. Fleet Variable Funding Notes Series 2011-2 USD ($)		Dec. 31, 2011 U.S. Fleet Variable Funding Notes Series 2011-2 USD ($)		Sep. 30, 2012 U.S. Fleet Medium Term Notes USD ($)	Dec. 31, 2011 U.S. Fleet Medium Term Notes USD ($)	Sep. 30, 2012 U.S. Fleet Medium Term Notes Series 2009-2 Notes USD ($)		Dec. 31, 2011 U.S. Fleet Medium Term Notes Series 2009-2 Notes USD ($)		Sep. 30, 2012 U.S. Fleet Medium Term Notes Series 2010-1 Notes USD ($)		Dec. 31, 2011 U.S. Fleet Medium Term Notes Series 2010-1 Notes USD ($)		Sep. 30, 2012 U.S. Fleet Medium Term Notes Series 2011-1 Notes USD ($)		Dec. 31, 2011 U.S. Fleet Medium Term Notes Series 2011-1 Notes USD ($)		Sep. 30, 2012 Donlen GN II Variable Funding Note Facility USD ($)		Jul. 31, 2012 Donlen GN II Variable Funding Note Facility USD ($)	Feb. 29, 2012 Donlen GN II Variable Funding Note Facility USD ($)	Dec. 31, 2011 Donlen GN II Variable Funding Note Facility USD ($)		Sep. 30, 2012 Other Fleet Debt USD ($)	Dec. 31, 2011 Other Fleet Debt USD ($)	Sep. 30, 2012 U.S. Fleet Financing Facility USD ($)	Dec. 31, 2011 U.S. Fleet Financing Facility USD ($)	Sep. 30, 2012 European Revolving Credit Facility [Member] USD ($)	Sep. 30, 2012 European Revolving Credit Facility [Member] EUR (€)	Dec. 31, 2011 European Revolving Credit Facility [Member] USD ($)	Sep. 30, 2012 European Fleet Notes USD ($)	Dec. 31, 2011 European Fleet Notes USD ($)	Sep. 30, 2012 European Securitization USD ($)		Dec. 31, 2011 European Securitization USD ($)		Sep. 30, 2012 Canadian Securitization USD ($)	Dec. 31, 2011 Canadian Securitization USD ($)	Sep. 30, 2012 Australian Securitization USD ($)		Dec. 31, 2011 Australian Securitization USD ($)		Sep. 30, 2012 Brazilian Fleet Financing Facility USD ($)	Dec. 31, 2011 Brazilian Fleet Financing Facility USD ($)	Sep. 30, 2012 Capitalized Leases USD ($)	Dec. 31, 2011 Capitalized Leases USD ($)	Sep. 30, 2012 Dollar Thrifty Automotive Group Inc [Member] Senior credit facility USD ($)	Sep. 30, 2012 Dollar Thrifty Automotive Group Inc [Member] European Securitization USD ($)
Debt
Average Interest Rate (as a percent)								3.75%		2.47%					7.09%	[1]																		6.96%		5.05%							1.25%	[2],[3]					1.36%	[2]									4.95%	[2]			3.77%	[2]			2.86%	[2]			1.17%	[4]							3.27%		2.72%	2.72%		8.50%		2.51%	[2]			2.16%		5.02%	[2],[5]			13.53%		4.40%
Outstanding principal								$ 1,379,000,000	$ 1,389,500,000	$ 410,000,000	$ 0				$ 2,450,000,000	[1]	$ 2,638,600,000	[1]	$ 0		$ 162,300,000	$ 0		$ 276,300,000	€ 213,500,000	$ 700,000,000	$ 700,000,000	$ 500,000,000	$ 500,000,000		$ 1,250,000,000	$ 1,000,000,000		$ 48,700,000	$ 224,700,000	$ 65,700,000	$ 49,600,000				$ 2,100,000,000	$ 1,345,000,000	$ 1,900,000,000	[2],[3]			$ 1,000,000,000	[2],[3]	$ 200,000,000	[2]	$ 170,000,000	[2]	$ 0	[2]	$ 175,000,000	[2]	$ 2,732,100,000	$ 2,732,100,000	$ 1,384,300,000	[2]	$ 1,384,300,000	[2]	$ 749,800,000	[2]	$ 749,800,000	[2]	$ 598,000,000	[2]	$ 598,000,000	[2]	$ 899,300,000	[4]			$ 811,200,000	[4]			$ 158,900,000	$ 136,000,000	$ 393,600,000		$ 200,600,000	$ 514,900,000	$ 517,700,000	$ 413,600,000	[2]	$ 256,200,000	[2]	$ 147,100,000	$ 68,300,000	$ 162,300,000	[2],[5]	$ 169,300,000	[2],[5]	$ 14,000,000	$ 23,100,000	$ 407,700,000	$ 363,700,000		$ 1,950,000,000
Unamortized Net (Discount) Premium				3,300,000	(6,900,000)																																	(7,000,000)	(10,900,000)
Debt	12,293,232,000	10,907,849,000		4,356,700,000	4,295,500,000																																	7,936,500,000	6,612,300,000																																						2,205,100,000	1,724,000,000
Interest rate (as a percent)																			8.875%	8.875%		7.875%	7.875%								6.75%
Line of Credit Facility, Current Borrowing Capacity																																																																											850,000,000
Aggregate amounts of maturities of debt for each of the twelve month periods
2013	5,785,100
2014	254,000
2015	1,769,600
2016	329,200
2017	266,000
After 2017	3,893,000
Letters of Credit
Outstanding standby letters of credit			601,100,000			553,300,000																																		291,000,000																																																												750,000,000
Outstanding amount related to other debt obligations			65,700,000
Weighted average interest rate of short term borrowings (as percent)	2.10%
Maximum maturity period of outstanding borrowings to be reflected as short-term borrowings (in months)	3 months
Period over which cash generated from operations, together with amounts available under various liquidity facilities will be adequate to permit entity to meet debt maturities (in months)	12 months
2012 Events
Aggregate maximum borrowings																																																																									1,000,000,000	900,000,000							110,300,000	85,700,000
Additional aggregate principal issued																														250,000,000
Write-off of unamortized debt costs														3,200,000
Increase in the credit agreement's borrowing capacity																																													250,000,000	250,000,000
Registration Rights
Special interest (as a percent)																															0.25%
Period of initial default per registration payment arrangement																															90 days
Increase in special interest during each subsequent 90 day period (as a percent)																															0.25%
Period of subsequent default per registration payment arrangement																															90 days
Increase in special interest (as a percent)																																	0.50%
Financial Covenant Compliance
Fixed charge coverage ratio												1
Borrowing Capacity and Availability
Remaining Capacity	1,833,400,000			1,037,300,000						1,037,300,000																												796,100,000			288,100,000																														105,800,000								31,100,000		0					101,300,000				55,800,000		97,000,000						117,000,000
Availability Under Borrowing Base Limitation	1,017,700,000			1,016,500,000			300,000			1,016,500,000			1,092,300,000																									1,200,000			0																														0								0		0					0				0		1,200,000						0
Total assets of variable interest entities	658,500,000	456,300,000
Total liabilities of variable interest entities	$ 658,000,000	$ 455,800,000

[1] References to our "Senior Notes" include the series of Hertz's unsecured senior notes set forth in the table below. As of September 30, 2012 and December 31, 2011, the outstanding principal amount for each such series of the Senior Notes is also specified below.

[2] Maturity reference is to the "expected final maturity date" as opposed to the subsequent "legal maturity date." The expected final maturity date is the date by which Hertz and investors in the relevant indebtedness expect the relevant indebtedness to be repaid. The legal final maturity date is the date on which the relevant indebtedness is legally due and payable.

[3] In October 2012, extended to 3/2014. See Note 17—Subsequent Events.

[4] In October 2012, extended to 12/2013. See Note 17—Subsequent Events.

[5] In October 2012, extended to 12/2014. See Note 17—Subsequent Events.