Document and Entity Information - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2014	Jun. 30, 2015	Jun. 30, 2014
Document And Entity Information [Abstract]
Entity Registrant Name	HERTZ GLOBAL HOLDINGS INC
Entity Central Index Key	0001364479
Document Type	10-K
Document Period End Date	Dec. 31, 2014
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Voluntary Filers	No
Entity Current Reporting Status	No
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		459,015,115
Entity Public Float			$ 12.8
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY
Entity Well-known Seasoned Issuer	No