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Note 13 - Properties and Equipment, Accrued Expenses, Other Current Liabilities, and Other Liabilities (Details Textual)	3 Months Ended	9 Months Ended
	Dec. 31, 2021	Sep. 30, 2022
Number of Vessels	135	187
Number of Vessels, Held for Sale	18	8

X

- Definition

The number of vessels.

+ References

No definition available.

+ Details

Name:	tdw_NumberOfVessels
Namespace Prefix:	tdw_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The number of vessels classified as held for sale.

+ References

No definition available.

+ Details

Name:	tdw_NumberOfVesselsHeldForSale
Namespace Prefix:	tdw_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant