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BUSINESS SEGMENTS AND GEOGRAPHIC INFORMATION - Total Assets by Reportable Segment (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Sep. 30, 2021
Segment Reporting Information [Line Items]
Assets	$ 4,392,254	$ 5,034,128
Operating Segment
Segment Reporting Information [Line Items]
Assets	3,910,834	3,868,367
Investments and corporate operations
Segment Reporting Information [Line Items]
Assets	481,420	1,165,761
North America Solutions | Operating Segment
Segment Reporting Information [Line Items]
Assets	3,399,211	3,418,569
Offshore Gulf of Mexico | Operating Segment
Segment Reporting Information [Line Items]
Assets	84,661	84,580
International Solutions | Operating Segment
Segment Reporting Information [Line Items]
Assets	341,553	269,820
Other | Operating Segment
Segment Reporting Information [Line Items]
Assets	$ 85,409	$ 95,398

X

- Definition

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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