Cover - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2020	Nov. 12, 2020	Mar. 29, 2019
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Sep. 30, 2020
Document Transition Report	false
Entity File Number	1-4221
Entity Registrant Name	HELMERICH & PAYNE, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	73-0679879
Entity Address, Address Line One	1437 South Boulder Avenue, Suite 1400
Entity Address, City or Town	Tulsa
Entity Address, State or Province	OK
Entity Address, Postal Zip Code	74119
City Area Code	918
Local Phone Number	742-5531
Title of 12(b) Security	Common Stock ($0.10 par value)
Trading Symbol	HP
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
ICFR Auditor Attestation Flag	true
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float			$ 1,680
Entity Common Stock, Shares Outstanding		107,601,988
Documents Incorporated by Reference	Portions of the Registrant’s 2020 Proxy Statement for the Annual Meeting of Stockholders to be held on March 2, 2021 are incorporated by reference into Part III of this Form 10‑K. The 2020 Proxy Statement will be filed with the U.S. Securities and Exchange Commission within 120 days after the end of the fiscal year to which this Form 10‑K relates.
Document Fiscal Period Focus	FY
Amendment Flag	false
Document Fiscal Year Focus	2020
Current Fiscal Year End Date	--09-30
Entity Central Index Key	0000046765