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Stock-Based Compensation (Details 2) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Dec. 31, 2010
Dec. 31, 2012
Hertz Global Holdings [Member]
Dec. 31, 2011
Hertz Global Holdings [Member]
Compensation Expense and Tax Benefit              
Compensation expense $ 11.7 $ 7.5 $ 19.7 $ 15.0 $ 36.6 $ 30.3 $ 31.0
Stock-based employee compensation charges, tax 4.5 2.9 7.6 5.8 14.2 11.7 12.0
Total $ 7.2 $ 4.6 $ 12.1 $ 9.2 $ 22.4 $ 18.6 $ 19.0