Note 15 - Solstad Vessel Acquisition (Details Textual) - Solstad Offshore ASA [Member] $ in Millions	Mar. 07, 2023 USD ($)
Number Of Offshore Supply Vessels	37
Expected Payments to Acquire Property, Plant, and Equipment	$ 577

The amount of expected payments to acquire property, plant, and equipment.

No definition available.

Name:	tdw_ExpectedPaymentsToAcquirePropertyPlantAndEquipment
Namespace Prefix:	tdw_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant