Subsequent Events (Details) (USD $) In Millions, unless otherwise specified								1 Months Ended		1 Months Ended						1 Months Ended
	Sep. 30, 2012 Senior credit facility	Sep. 30, 2012 Donlen GN II Variable Funding Note Facility		Jul. 31, 2012 Donlen GN II Variable Funding Note Facility	Feb. 29, 2012 Donlen GN II Variable Funding Note Facility	Dec. 31, 2011 Donlen GN II Variable Funding Note Facility		Mar. 31, 2012 Senior Notes 5.875 Percent Due 2020 [Member]	Sep. 30, 2012 Senior Notes 5.875 Percent Due 2020 [Member]	Mar. 31, 2012 Senior Notes 6.250 Percent Due 2022 [Member]	Sep. 30, 2012 Senior Notes 6.250 Percent Due 2022 [Member]	Sep. 30, 2012 European Securitization		Dec. 31, 2011 European Securitization		Oct. 31, 2012 Subsequent event Senior Notes 5.875 Percent Due 2020 [Member]	Oct. 31, 2012 Subsequent event Senior Notes 6.250 Percent Due 2022 [Member]	Oct. 31, 2012 Subsequent event European Securitization	Oct. 31, 2012 Dollar Thrifty Automotive Group Inc [Member] Subsequent event Senior credit facility
Subsequent events
Outstanding standby letters of credit	$ 553.3																		$ 750.0
Aggregate maximum borrowings				1,000.0	900.0
Additional aggregate principal issued								700		500						700	500
Interest rate (as a percent)									5.875%		6.25%					5.875%	6.25%
Outstanding principal		$ 899.3	[1]			$ 811.2	[1]					$ 413.6	[2]	$ 256.2	[2]			$ 1,950.0

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

[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.