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BUSINESS SEGMENTS AND GEOGRAPHIC INFORMATION - Schedule of Reconciliation of Segment Assets to Consolidated Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Sep. 30, 2024
Segment Reporting Information [Line Items]
Assets	$ 6,862,003	$ 5,781,898
Operating Segments
Segment Reporting Information [Line Items]
Assets	6,574,423	4,142,239
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Assets	287,580	1,639,659
North America Solutions | Operating Segments
Segment Reporting Information [Line Items]
Assets	3,099,587	3,225,410
International Solutions | Operating Segments
Segment Reporting Information [Line Items]
Assets	2,504,474	685,833
Offshore Solutions | Operating Segments
Segment Reporting Information [Line Items]
Assets	645,611	73,119
Other | Operating Segments
Segment Reporting Information [Line Items]
Assets	$ 324,751	$ 157,877

X

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Amount of asset recognized for present right to economic benefit.

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