Earnings Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Numerator:
Net income (loss) attributable to Hertz Global Holdings, Inc. and Subsidiaries' common stockholders	$ (36,400)	$ 242,900	$ 92,900	$ (56,300)	$ 47,000	$ 206,700	$ 55,000	$ (132,600)	$ 243,079	$ 176,170	$ (48,681)
Denominator:
Weighted average shares used in basic computation									419,944,000	415,882,000	411,941,000
Add: Stock options, RSUs and PSUs (in shares)									5,000,000	7,500,000	0
Add: Potential issuance of common stock upon conversion of Convertible Senior Notes (in shares)									23,300,000	21,400,000	0
Weighted average shares used in diluted computation									448,209,000	444,778,000	411,941,000
Earnings Per Share:
Earnings (loss) per share, basic (In dollars per share)	$ (0.09)	$ 0.58	$ 0.22	$ (0.13)	$ 0.11	$ 0.50	$ 0.13	$ (0.32)	$ 0.58	$ 0.42	$ (0.12)
Earnings (loss) per share, diluted (In dollars per share)	$ (0.09)	$ 0.55	$ 0.21	$ (0.13)	$ 0.11	$ 0.47	$ 0.12	$ (0.32)	$ 0.54	$ 0.40	$ (0.12)
Stock Compensation Plan
Earnings Per Share:
Anti-dilutive securities (in shares)									2,900,000	8,700,000	22,600,000