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BUSINESS COMBINATION - Pro Forma Financial Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract]
Revenue	$ 4,232,105	$ 4,468,207
Net income (loss)	(239,660)	172,107
Net income attributable to non-controlling interest	7,728	12,947
Net income (loss) attributable to Helmerich & Payne, Inc.	$ (247,388)	$ 159,160

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