Revenue Earning Equipment (Deprecation Rates) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenue earning equipment
Net increase (decrease) in depreciation expense	$ 164	$ (39)	$ (129)
U.S. Car Rental
Revenue earning equipment
Net increase (decrease) in depreciation expense	167	(44)	(139)
International Car Rental
Revenue earning equipment
Net increase (decrease) in depreciation expense	(3)	5	9
Worldwide Equipment Rental
Revenue earning equipment
Net increase (decrease) in depreciation expense	$ 0	$ 0	$ 1