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Document and Entity Information - USD ($)
$ in Billions
12 Months Ended
Sep. 30, 2015
Nov. 13, 2015
Mar. 31, 2015
Document and Entity Information      
Entity Registrant Name Helmerich & Payne, Inc.    
Entity Central Index Key 0000046765    
Document Type 10-K    
Document Period End Date Sep. 30, 2015    
Amendment Flag false    
Current Fiscal Year End Date --09-30    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Filer Category Large Accelerated Filer    
Entity Public Float     $ 7.1
Entity Common Stock, Shares Outstanding   107,787,205  
Document Fiscal Year Focus 2015    
Document Fiscal Period Focus FY