Cover Page - USD ($)	12 Months Ended
	Sep. 30, 2022	Nov. 14, 2022	Mar. 31, 2022
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Sep. 30, 2022
Current Fiscal Year End Date	--09-30
Document Transition Report	false
Entity File Number	001-08359
Entity Registrant Name	NEW JERSEY RESOURCES CORPORATION
Entity Incorporation, State or Country Code	NJ
Entity Tax Identification Number	22-2376465
Entity Address, Address Line One	1415 Wyckoff Road,
Entity Address, City or Town	Wall,
Entity Address, State or Province	NJ
Entity Address, Postal Zip Code	07719
City Area Code	(732)
Local Phone Number	938‑1000
Title of 12(b) Security	Common Stock ‑ $2.50 Par Value
Trading Symbol	NJR
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 4,388,979,332
Entity Common Stock, Shares Outstanding		96,386,496
Documents Incorporated by Reference	Portions of the registrant’s definitive Proxy Statement for the Annual Meeting of Shareowners (Proxy Statement) to be held on January 25, 2023, are incorporated by reference into Part I and Part III of this report.
Entity Central Index Key	0000356309
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	FY
Amendment Flag	false