XML 61 R6.htm IDEA: XBRL DOCUMENT
v3.20.1

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Unaudited) (Parenthetical) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Statement Of Income And Comprehensive Income [Abstract] |  |
Change in pension plan and supplemental pension plan liability | $ 0 | $ 0

X
- Definition Other comprehensive income pension plan and supplemental pension plan liability adjustment tax period increase decrease. + References No definition available. + Details
Name: | tdw_OtherComprehensiveIncomePensionPlanAndSupplementalPensionPlanLiabilityAdjustmentTaxPeriodIncreaseDecrease
Namespace Prefix: | tdw_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration