$TDW
TIDEWATER INC Stock $tdw

$tdw Overview Financials Valuation SEC Filings Company Website

2023 Q1 Form 10-K Financial Statement

#000143774923004829 Filed on February 28, 2023

Income Statement

Concept	2023 Q1	2022 Q4	2022
Revenue	$193.1M	$186.7M	$647.7M
YoY Change	82.64%	77.56%	74.56%
Cost Of Revenue	$116.6M	$116.2M	$399.4M
YoY Change	69.31%	62.7%	51.27%
Gross Profit	$76.49M	$70.56M	$248.3M
YoY Change	107.54%	108.99%	132.04%
Gross Profit Margin	39.61%	37.78%	38.33%
Selling, General & Admin	$23.55M	$28.63M	$99.90M
YoY Change	29.25%	64.0%	46.54%
% of Gross Profit	30.78%	40.58%	40.24%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$21.05M	$20.98M	$83.52M
YoY Change	19.1%	12.7%	14.07%
% of Gross Profit	27.52%	29.74%	33.64%
Operating Expenses	$54.21M	$58.51M	$219.1M
YoY Change	20.81%	27.91%	19.89%
Operating Profit	$24.50M	$12.04M	$26.71M
YoY Change	-435.14%	-200.46%	-128.11%
Interest Expense	$130.0K	-$1.239M	$5.397M
YoY Change	-96.27%	-59.16%	236.26%
% of Operating Profit	0.53%	-10.29%	20.21%
Other Income/Expense, Net	-$1.712M		-$29.02M
YoY Change	-766.15%		0.86%
Pretax Income	$22.79M	$11.88M	-$2.307M
YoY Change	-423.08%	-128.88%	-98.14%
Income Tax	$11.97M	$1.697M	$19.89M
% Of Pretax Income	52.53%	14.29%
Net Earnings	$10.74M	$10.62M	-$21.75M
YoY Change	-188.25%	-128.0%	-83.14%
Net Earnings / Revenue	5.56%	5.69%	-3.36%
Basic Earnings Per Share	$0.21		-$0.49
Diluted Earnings Per Share	$0.21	$0.22	-$0.49
COMMON SHARES
Basic Shares Outstanding	50.57M	46.51M	44.13K
Diluted Shares Outstanding	51.97M		44.13K

Balance Sheet

Concept	2023 Q1	2022 Q4	2022
SHORT-TERM ASSETS
Cash & Short-Term Investments	$165.1M	$164.2M	$164.2M
YoY Change	21.22%	10.17%	10.17%
Cash & Equivalents	$165.1M	$164.2M	$164.2M
Short-Term Investments
Other Short-Term Assets	$24.65M	$26.42M	$26.42M
YoY Change	-3.58%	8.32%	8.32%
Inventory	$24.45M	$30.83M	$30.83M
Prepaid Expenses
Receivables	$182.2M	$156.5M	$156.5M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$396.4M	$377.9M	$377.9M
YoY Change	28.22%	10.28%	10.28%
LONG-TERM ASSETS
Property, Plant & Equipment	$786.2M	$796.7M	$803.7M
YoY Change	16.03%	15.79%	16.23%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$34.06M	$33.64M	$116.0M
YoY Change	48.1%	38.26%	88.31%
Total Long-Term Assets	$930.7M	$919.7M	$919.7M
YoY Change	24.94%	22.13%	22.13%
TOTAL ASSETS
Total Short-Term Assets	$396.4M	$377.9M	$377.9M
Total Long-Term Assets	$930.7M	$919.7M	$919.7M
Total Assets	$1.327B	$1.298B	$1.298B
YoY Change	25.9%	18.42%	18.42%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$64.78M	$38.95M	$38.95M
YoY Change	173.36%	87.35%	87.35%
Accrued Expenses	$107.3M	$105.5M	$107.6M
YoY Change	94.68%	103.96%	102.54%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due		$0.00
YoY Change
Total Short-Term Liabilities	$215.3M	$194.8M	$194.8M
YoY Change	71.59%	23.33%	23.33%
LONG-TERM LIABILITIES
Long-Term Debt	$169.4M	$169.0M	$169.0M
YoY Change	0.85%	0.69%	0.69%
Other Long-Term Liabilities	$68.97M	$67.84M	$67.84M
YoY Change	-2.71%	-0.5%	-0.5%
Total Long-Term Liabilities	$238.4M	$236.9M	$236.9M
YoY Change	-0.21%	0.34%	0.34%
TOTAL LIABILITIES
Total Short-Term Liabilities	$215.3M	$194.8M	$194.8M
Total Long-Term Liabilities	$238.4M	$236.9M	$236.9M
Total Liabilities	$453.7M	$431.7M	$431.7M
YoY Change	24.52%	9.56%	9.43%
SHAREHOLDERS EQUITY
Retained Earnings	-$688.9M	-$699.6M
YoY Change	-0.17%	3.21%
Common Stock	$1.554B	$1.557B
YoY Change	12.85%	13.11%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$873.3M	$866.0M	$866.0M
YoY Change
Total Liabilities & Shareholders Equity	$1.327B	$1.298B	$1.298B
YoY Change	25.9%	18.42%	18.42%

Cashflow Statement

Concept	2023 Q1	2022 Q4	2022
OPERATING ACTIVITIES
Net Income	$10.74M	$10.62M	-$21.75M
YoY Change	-188.25%	-128.0%	-83.14%
Depreciation, Depletion And Amortization	$21.05M	$20.98M	$83.52M
YoY Change	19.1%	12.7%	14.07%
Cash From Operating Activities	$12.79M	$45.34M	$40.23M
YoY Change	-210.07%	553.5%	168.07%
INVESTING ACTIVITIES
Capital Expenditures	$8.651M	$4.929M	$16.64M
YoY Change	603.91%	-177.4%	85.87%
Acquisitions	$0.00		$20.74M
YoY Change	-100.0%
Other Investing Activities	$5.716M	$5.093M	-$7.172M
YoY Change	59.26%	9331.48%	-121.09%
Cash From Investing Activities	-$2.935M	$164.0K	-$23.81M
YoY Change	-224.36%	-102.6%	-195.01%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net			$187.8M
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-$5.174M	-47.00K	-$2.716M
YoY Change	304.22%	-2.08%	-93.38%
NET CHANGE
Cash From Operating Activities	$12.79M	45.34M	$40.23M
Cash From Investing Activities	-$2.935M	164.0K	-$23.81M
Cash From Financing Activities	-$5.174M	-47.00K	-$2.716M
Net Change In Cash	$4.685M	45.46M	$13.70M
YoY Change	-144.43%	7791.84%	-1543.73%
FREE CASH FLOW
Cash From Operating Activities	$12.79M	$45.34M	$40.23M
Capital Expenditures	$8.651M	$4.929M	$16.64M
Free Cash Flow	$4.143M	$40.41M	$23.59M
YoY Change	-132.23%	203.71%	289.58%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2021Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2022Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	125000000
CY2021Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	125000000
CY2022Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	50554179
CY2022Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	50554179
CY2021Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	41307617
CY2021Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	41307617
CY2022	tdw	Highly Liquid Investments Maturity Period HighlyLiquidInvestmentsMaturityPeriod	P3Y
CY2020	tdw	Number Of Vessels Transfer From Held For Sale To Active Fleet NumberOfVesselsTransferFromHeldForSaleToActiveFleet	2	pure
CY2022Q4	us-gaap	Defined Benefit Plan Expected Amortization Of Prior Service Cost Credit Next Fiscal Year DefinedBenefitPlanExpectedAmortizationOfPriorServiceCostCreditNextFiscalYear	0	usd
CY2022Q4	us-gaap	Preferred Stock No Par Value PreferredStockNoParValue	0
CY2021Q4	us-gaap	Preferred Stock No Par Value PreferredStockNoParValue	0
CY2022Q4	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	4000000	usd
CY2021Q4	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	3200000	usd
CY2022Q4	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	2500000	usd
CY2022Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	105518000	usd
CY2021Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	51734000	usd
CY2022Q4	us-gaap	Due To Affiliate Current DueToAffiliateCurrent	0	usd
CY2021Q4	us-gaap	Due To Affiliate Current DueToAffiliateCurrent	61555000	usd
CY2022Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	50323000	usd
CY2021Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	23865000	usd
CY2022Q4	us-gaap	Liabilities Current LiabilitiesCurrent	194787000	usd
CY2021Q4	us-gaap	Liabilities Current LiabilitiesCurrent	157942000	usd
CY2022Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	169036000	usd
CY2021Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	68184000	usd
CY2021Q4	us-gaap	Common Stock Value CommonStockValue	41000	usd
CY2022Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	1556990000	usd
CY2021Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	1376494000	usd
CY2022Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-699649000	usd
CY2021Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-677900000	usd
CY2022Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2021Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2022	dei	Amendment Flag AmendmentFlag	false
CY2022	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2022	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2022	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2022
CY2022Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	11698000	usd
CY2021Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	72456000	usd
CY2022Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2022	tdw	Inspection Interval InspectionInterval	P5Y
CY2022	dei	Document Annual Report DocumentAnnualReport	true
CY2022	dei	Document Period End Date DocumentPeriodEndDate	2022-12-31
CY2022	dei	Document Type DocumentType	10-K
CY2022Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	8576000	usd
CY2021Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	2668000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	865968000	usd
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	701303000	usd
CY2022	dei	Document Transition Report DocumentTransitionReport	false
CY2022	dei	Entity File Number EntityFileNumber	1-6311
CY2022	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2022	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	72-0487776
CY2022	dei	Entity Address Address Line1 EntityAddressAddressLine1	842 West Sam Houston Parkway North, Suite 400
CY2022	dei	Entity Address City Or Town EntityAddressCityOrTown	Houston
CY2022	dei	Entity Address State Or Province EntityAddressStateOrProvince	TX
CY2022	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	77024
CY2022	dei	City Area Code CityAreaCode	713
CY2022	dei	Local Phone Number LocalPhoneNumber	470-5300
CY2022	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2022	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2022	dei	Entity Current Reporting Status EntityCurrentReportingStatus	No
CY2022	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2022	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2022	dei	Entity Small Business EntitySmallBusiness	false
CY2022	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2022	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2022	dei	Entity Shell Company EntityShellCompany	false
CY2022Q2	dei	Entity Public Float EntityPublicFloat	827400000	usd
CY2023Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	50566909
CY2022	dei	Auditor Firm AuditorFirmId	238
CY2022	dei	Auditor Name AuditorName	PricewaterhouseCoopers LLP
CY2022	dei	Auditor Location AuditorLocation	Houston, Texas
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	164192000	usd
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	149037000	usd
CY2022Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	1241000	usd
CY2021Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	1240000	usd
CY2022Q4	us-gaap	Accounts And Other Receivables Net Current AccountsAndOtherReceivablesNetCurrent	156465000	usd
CY2021Q4	us-gaap	Accounts And Other Receivables Net Current AccountsAndOtherReceivablesNetCurrent	86503000	usd
CY2022Q4	us-gaap	Due From Affiliate Current DueFromAffiliateCurrent	0	usd
CY2021Q4	us-gaap	Due From Affiliate Current DueFromAffiliateCurrent	70134000	usd
CY2022Q4	us-gaap	Supplies Supplies	30830000	usd
CY2021Q4	us-gaap	Supplies Supplies	12606000	usd
CY2022Q4	us-gaap	Assets Held For Sale Not Part Of Disposal Group Current AssetsHeldForSaleNotPartOfDisposalGroupCurrent	4195000	usd
CY2021Q4	us-gaap	Assets Held For Sale Not Part Of Disposal Group Current AssetsHeldForSaleNotPartOfDisposalGroupCurrent	14421000	usd
CY2022Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	20985000	usd
CY2021Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	8731000	usd
CY2022Q4	us-gaap	Assets Current AssetsCurrent	377908000	usd
CY2021Q4	us-gaap	Assets Current AssetsCurrent	342672000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	796655000	usd
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	688040000	usd
CY2022Q4	us-gaap	Deferred Costs DeferredCosts	61080000	usd
CY2021Q4	us-gaap	Deferred Costs DeferredCosts	40734000	usd
CY2022Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	33644000	usd
CY2021Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	24334000	usd
CY2022Q4	us-gaap	Assets Assets	1297656000	usd
CY2021Q4	us-gaap	Assets Assets	1095780000	usd
CY2022Q4	us-gaap	Minority Interest MinorityInterest	22000	usd
CY2021Q4	us-gaap	Minority Interest MinorityInterest	466000	usd
CY2022Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	865990000	usd
CY2021Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	701769000	usd
CY2022Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1297656000	usd
CY2021Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1095780000	usd
CY2022	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	647684000	usd
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	371033000	usd
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	397038000	usd
CY2022	us-gaap	Direct Operating Costs DirectOperatingCosts	397301000	usd
CY2021	us-gaap	Direct Operating Costs DirectOperatingCosts	261814000	usd
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CY2021Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	20788000	usd
CY2020	us-gaap	Direct Operating Costs DirectOperatingCosts	268780000	usd
CY2022Q4	us-gaap	Common Stock Value CommonStockValue	51000	usd
CY2021Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	167885000	usd
CY2022Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	67843000	usd
CY2022	us-gaap	Other Cost Of Operating Revenue OtherCostOfOperatingRevenue	2130000	usd
CY2021	us-gaap	Other Cost Of Operating Revenue OtherCostOfOperatingRevenue	2231000	usd
CY2020	us-gaap	Other Cost Of Operating Revenue OtherCostOfOperatingRevenue	3405000	usd
CY2022	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	101921000	usd
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CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-4.86
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CY2020	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	73447000	usd
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CY2022	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	250000	usd
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CY2022	us-gaap	Costs And Expenses CostsAndExpenses	620976000	usd
CY2021	us-gaap	Costs And Expenses CostsAndExpenses	466049000	usd
CY2020	us-gaap	Costs And Expenses CostsAndExpenses	583840000	usd
CY2022	us-gaap	Operating Income Loss OperatingIncomeLoss	26708000	usd
CY2021	us-gaap	Operating Income Loss OperatingIncomeLoss	-95016000	usd
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	-186802000	usd
CY2022	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-2827000	usd
CY2021	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-369000	usd
CY2020	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-5245000	usd
CY2022	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-221000	usd
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CY2020	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	164000	usd
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CY2022	tdw	Interest And Other Debt Costs Net InterestAndOtherDebtCostsNet	17189000	usd
CY2021	tdw	Interest And Other Debt Costs Net InterestAndOtherDebtCostsNet	15583000	usd
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CY2020	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-10859000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-2307000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-123785000	usd
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-197661000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	19886000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5875000	usd
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-965000	usd
CY2022	us-gaap	Profit Loss ProfitLoss	-22193000	usd
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-4.86
CY2021	us-gaap	Profit Loss ProfitLoss	-129660000	usd
CY2020	us-gaap	Profit Loss ProfitLoss	-196696000	usd
CY2022	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-444000	usd
CY2021	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-691000	usd
CY2020	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-454000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	-21749000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	-128969000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-196242000	usd
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.49
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-3.14
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	44132
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	41009
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	40355
CY2022	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0
CY2022	us-gaap	Affiliate Costs AffiliateCosts	0	usd
CY2021	us-gaap	Affiliate Costs AffiliateCosts	0	usd
CY2020	us-gaap	Affiliate Costs AffiliateCosts	2000000	usd
CY2021	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0
CY2020	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	44132
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	41009
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	40355
CY2022	us-gaap	Profit Loss ProfitLoss	-22193000	usd
CY2021	us-gaap	Profit Loss ProfitLoss	-129660000	usd
CY2020	us-gaap	Profit Loss ProfitLoss	-196696000	usd
CY2022	tdw	Other Comprehensive Income Loss Unrealized Gain Loss On Note Receivable Total OtherComprehensiveIncomeLossUnrealizedGainLossOnNoteReceivableTotal	-496000	usd
CY2021	tdw	Other Comprehensive Income Loss Unrealized Gain Loss On Note Receivable Total OtherComprehensiveIncomeLossUnrealizedGainLossOnNoteReceivableTotal	0	usd
CY2020	tdw	Other Comprehensive Income Loss Unrealized Gain Loss On Note Receivable Total OtherComprehensiveIncomeLossUnrealizedGainLossOnNoteReceivableTotal	0	usd
CY2022	tdw	Other Comprehensive Income Supplemental Executive Retirement Plan Minimum Liability Adjustment Net Of Tax Period Increase Decrease OtherComprehensiveIncomeSupplementalExecutiveRetirementPlanMinimumLiabilityAdjustmentNetOfTaxPeriodIncreaseDecrease	4561000	usd
CY2021	tdw	Other Comprehensive Income Supplemental Executive Retirement Plan Minimum Liability Adjustment Net Of Tax Period Increase Decrease OtherComprehensiveIncomeSupplementalExecutiveRetirementPlanMinimumLiabilityAdjustmentNetOfTaxPeriodIncreaseDecrease	-763000	usd
CY2020	tdw	Other Comprehensive Income Supplemental Executive Retirement Plan Minimum Liability Adjustment Net Of Tax Period Increase Decrease OtherComprehensiveIncomeSupplementalExecutiveRetirementPlanMinimumLiabilityAdjustmentNetOfTaxPeriodIncreaseDecrease	-2309000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-1843000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-4235000	usd
CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-1741000	usd
CY2022	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-16285000	usd
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-126188000	usd
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-197264000	usd
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1016410000	usd
CY2020	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-197264000	usd
CY2020	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	-0	usd
CY2020	tdw	Stock Issued During Period Value Amortization Or Cancellation Of Restricted Stock StockIssuedDuringPeriodValueAmortizationOrCancellationOfRestrictedStock	4289000	usd
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	823272000	usd
CY2021	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-126188000	usd
CY2021	tdw	Stock Issued During Period Value Amortization Or Cancellation Of Restricted Stock StockIssuedDuringPeriodValueAmortizationOrCancellationOfRestrictedStock	4685000	usd
CY2021Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	701769000	usd
CY2022	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-16285000	usd
CY2022	tdw	Stock Issued During Period Value Warrant Exercises StockIssuedDuringPeriodValueWarrantExercises	192891000	usd
CY2022	tdw	Class Of Warrant Or Right Issued During Period Value ClassOfWarrantOrRightIssuedDuringPeriodValue	176823000	usd
CY2022	tdw	Class Of Warrant Or Right Repurchased During Period Value ClassOfWarrantOrRightRepurchasedDuringPeriodValue	-194256000	usd
CY2022	tdw	Stock Issued During Period Value Amortization Or Cancellation Of Restricted Stock StockIssuedDuringPeriodValueAmortizationOrCancellationOfRestrictedStock	5048000	usd
CY2022Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	865990000	usd
CY2022	us-gaap	Profit Loss ProfitLoss	-22193000	usd
CY2021	us-gaap	Profit Loss ProfitLoss	-129660000	usd
CY2020	us-gaap	Profit Loss ProfitLoss	-196696000	usd
CY2022	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	83522000	usd
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	73223000	usd
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	73030000	usd
CY2022	tdw	Amortization Of Dry Docking And Survey Costs AmortizationOfDryDockingAndSurveyCosts	35638000	usd
CY2021	tdw	Amortization Of Dry Docking And Survey Costs AmortizationOfDryDockingAndSurveyCosts	41321000	usd
CY2020	tdw	Amortization Of Dry Docking And Survey Costs AmortizationOfDryDockingAndSurveyCosts	43679000	usd
CY2022	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	1679000	usd
CY2021	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	3171000	usd
CY2020	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	3961000	usd
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	36000	usd
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-1287000	usd
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	1224000	usd
CY2022	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	250000	usd
CY2021	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	-2901000	usd
CY2020	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	7591000	usd
CY2022	us-gaap	Business Combination Bargain Purchase Gain Recognized Amount BusinessCombinationBargainPurchaseGainRecognizedAmount	1300000	usd
CY2022	us-gaap	Asset Impairment Charges AssetImpairmentCharges	714000	usd
CY2021	us-gaap	Asset Impairment Charges AssetImpairmentCharges	15643000	usd
CY2020	us-gaap	Asset Impairment Charges AssetImpairmentCharges	74109000	usd
CY2022	tdw	Gain Loss On Warrants GainLossOnWarrants	-14175000	usd
CY2021	tdw	Gain Loss On Warrants GainLossOnWarrants	-0	usd
CY2020	tdw	Gain Loss On Warrants GainLossOnWarrants	-0	usd
CY2022	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-0	usd
CY2021	us-gaap	Business Combination Bargain Purchase Gain Recognized Amount BusinessCombinationBargainPurchaseGainRecognizedAmount	-0	usd
CY2020	us-gaap	Business Combination Bargain Purchase Gain Recognized Amount BusinessCombinationBargainPurchaseGainRecognizedAmount	-0	usd
CY2022	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	0	usd
CY2021	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	400000	usd
CY2020	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	52981000	usd
CY2022	us-gaap	Payments For Repurchase Of Warrants PaymentsForRepurchaseOfWarrants	187832000	usd
CY2021	us-gaap	Payments For Repurchase Of Warrants PaymentsForRepurchaseOfWarrants	-0	usd
CY2020	us-gaap	Payments For Repurchase Of Warrants PaymentsForRepurchaseOfWarrants	-0	usd
CY2022	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	usd
CY2021	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-11100000	usd
CY2020	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-0	usd
CY2022	us-gaap	Share Based Compensation ShareBasedCompensation	7372000	usd
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	5638000	usd
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	5117000	usd
CY2022	us-gaap	Increase Decrease In Accounts And Other Receivables IncreaseDecreaseInAccountsAndOtherReceivables	4129000	usd
CY2021	us-gaap	Increase Decrease In Accounts And Other Receivables IncreaseDecreaseInAccountsAndOtherReceivables	-26120000	usd
CY2020	us-gaap	Increase Decrease In Accounts And Other Receivables IncreaseDecreaseInAccountsAndOtherReceivables	2606000	usd
CY2022	us-gaap	Increase Decrease In Due To Affiliates IncreaseDecreaseInDueToAffiliates	-20000	usd
CY2021	us-gaap	Increase Decrease In Due To Affiliates IncreaseDecreaseInDueToAffiliates	-123000	usd
CY2020	us-gaap	Increase Decrease In Due To Affiliates IncreaseDecreaseInDueToAffiliates	11949000	usd
CY2022	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	14611000	usd
CY2021	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-1365000	usd
CY2020	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-2588000	usd
CY2022	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	4899000	usd
CY2021	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	-2961000	usd
CY2020	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	-4264000	usd
CY2022	us-gaap	Increase Decrease In Accounts Payable Trade IncreaseDecreaseInAccountsPayableTrade	16481000	usd
CY2021	us-gaap	Increase Decrease In Accounts Payable Trade IncreaseDecreaseInAccountsPayableTrade	3807000	usd
CY2020	us-gaap	Increase Decrease In Accounts Payable Trade IncreaseDecreaseInAccountsPayableTrade	-10520000	usd
CY2022	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-1340000	usd
CY2021	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-688000	usd
CY2020	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-17551000	usd
CY2022	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	-555000	usd
CY2021	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	-8920000	usd
CY2020	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	8685000	usd
CY2022	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	-10930000	usd
CY2021	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	-6849000	usd
CY2020	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	-20002000	usd
CY2022	tdw	Increase Decrease In Cash Paid For Deferred Drydocking And Survey Costs IncreaseDecreaseInCashPaidForDeferredDrydockingAndSurveyCosts	56000000	usd
CY2021	tdw	Increase Decrease In Cash Paid For Deferred Drydocking And Survey Costs IncreaseDecreaseInCashPaidForDeferredDrydockingAndSurveyCosts	27282000	usd
CY2020	tdw	Increase Decrease In Cash Paid For Deferred Drydocking And Survey Costs IncreaseDecreaseInCashPaidForDeferredDrydockingAndSurveyCosts	33271000	usd
CY2022	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	3164000	usd
CY2021	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-2165000	usd
CY2020	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-8636000	usd
CY2022	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	40226000	usd
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	15006000	usd
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	3986000	usd
CY2022	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	13568000	usd
CY2021	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	34010000	usd
CY2020	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	38296000	usd
CY2022	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	20740000	usd
CY2021	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	-0	usd
CY2020	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	-0	usd
CY2022	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	16637000	usd
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	8951000	usd
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	14900000	usd
CY2022	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-23809000	usd
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	25059000	usd
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	23396000	usd
CY2022	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	187832000	usd
CY2021	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	usd
CY2020	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	usd
CY2021	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	172375000	usd
CY2020	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	usd
CY2022	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	-0	usd
CY2021	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	198918000	usd
CY2020	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	98080000	usd
CY2021Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	918274000	usd
CY2022Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	309985000	usd
CY2022	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	-0	usd
CY2021	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	7781000	usd
CY2020	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	-0	usd
CY2022	us-gaap	Payments Of Debt Restructuring Costs PaymentsOfDebtRestructuringCosts	393000	usd
CY2021	us-gaap	Payments Of Debt Restructuring Costs PaymentsOfDebtRestructuringCosts	5737000	usd
CY2020	us-gaap	Payments Of Debt Restructuring Costs PaymentsOfDebtRestructuringCosts	-0	usd
CY2022	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	2323000	usd
CY2021	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	953000	usd
CY2020	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	828000	usd
CY2022	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	0	usd
CY2021	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	0	usd
CY2020	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-857000	usd
CY2022	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-2716000	usd
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-41014000	usd
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-99765000	usd
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	13701000	usd
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-949000	usd
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-72383000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	154276000	usd
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	155225000	usd
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	227608000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	167977000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	154276000	usd
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	155225000	usd
CY2022	us-gaap	Interest Paid Net InterestPaidNet	15554000	usd
CY2021	us-gaap	Interest Paid Net InterestPaidNet	13747000	usd
CY2020	us-gaap	Interest Paid Net InterestPaidNet	21235000	usd
CY2022	us-gaap	Income Taxes Paid IncomeTaxesPaid	22275000	usd
CY2021	us-gaap	Income Taxes Paid IncomeTaxesPaid	19013000	usd
CY2020	us-gaap	Income Taxes Paid IncomeTaxesPaid	13018000	usd
CY2022	tdw	Noncash Or Part Noncash Acquisition Value NoncashOrPartNoncashAcquisitionValue	162648000	usd
CY2021	tdw	Noncash Or Part Noncash Acquisition Value NoncashOrPartNoncashAcquisitionValue	0	usd
CY2020	tdw	Noncash Or Part Noncash Acquisition Value NoncashOrPartNoncashAcquisitionValue	0	usd
CY2022	tdw	Noncash Or Part Noncash Acquisition Noncash Financial Or Equity Instrument Consideration Value Warrants Issued NoncashOrPartNoncashAcquisitionNoncashFinancialOrEquityInstrumentConsiderationValueWarrantsIssued	162648000	usd
CY2021	tdw	Noncash Or Part Noncash Acquisition Noncash Financial Or Equity Instrument Consideration Value Warrants Issued NoncashOrPartNoncashAcquisitionNoncashFinancialOrEquityInstrumentConsiderationValueWarrantsIssued	0	usd
CY2020	tdw	Noncash Or Part Noncash Acquisition Noncash Financial Or Equity Instrument Consideration Value Warrants Issued NoncashOrPartNoncashAcquisitionNoncashFinancialOrEquityInstrumentConsiderationValueWarrantsIssued	0	usd
CY2022	tdw	Noncash Or Part Noncash Acquisition Noncash Financial Or Equity Instrument Consideration Value Warrants Repurchased NoncashOrPartNoncashAcquisitionNoncashFinancialOrEquityInstrumentConsiderationValueWarrantsRepurchased	1365000	usd
CY2021	tdw	Noncash Or Part Noncash Acquisition Noncash Financial Or Equity Instrument Consideration Value Warrants Repurchased NoncashOrPartNoncashAcquisitionNoncashFinancialOrEquityInstrumentConsiderationValueWarrantsRepurchased	0	usd
CY2020	tdw	Noncash Or Part Noncash Acquisition Noncash Financial Or Equity Instrument Consideration Value Warrants Repurchased NoncashOrPartNoncashAcquisitionNoncashFinancialOrEquityInstrumentConsiderationValueWarrantsRepurchased	0	usd
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	796655000	usd
CY2021Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	230234000	usd
CY2022	us-gaap	Use Of Estimates UseOfEstimates	<p style="font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:left;"><b>Use of Estimates in Preparation of Financial Statements </b></p> <p style="font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:left;"> </p> <p style="font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:justify;">The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the recorded amounts of revenues and expenses during the reporting period. The accompanying consolidated financial statements include estimates for allowance for credit losses, useful lives of property and equipment, estimated net realizable value of assets held for sale and marine operating supplies, income tax provisions, impairments, commitments and contingencies and certain accrued liabilities. We evaluate our estimates and assumptions on an ongoing basis based on a combination of historical information and various other assumptions that are considered reasonable under the circumstances, the results of which form the basis for making judgments about carrying values of assets and liabilities that are <em style="font: inherit;">not</em> readily apparent from other sources. These accounting policies involve judgment and uncertainties to such an extent that there is reasonable likelihood that materially different amounts could have been reported under different conditions or if different assumptions had been used and, as such, actual results <em style="font: inherit;"> may </em>differ from these estimates.</p>
CY2022	tdw	Increase Of Amortization Period IncreaseOfAmortizationPeriod	P30M
CY2022Q4	us-gaap	Machinery And Equipment Gross MachineryAndEquipmentGross	1070821000	usd
CY2021Q4	us-gaap	Machinery And Equipment Gross MachineryAndEquipmentGross	898649000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	35819000	usd
CY2021Q4	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	19625000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	1106640000	usd
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	688040000	usd
CY2022	tdw	Number Of Offshore Supply Vessels NumberOfOffshoreSupplyVessels	191	pure
CY2022	tdw	Number Of Vessels Disposed NumberOfVesselsDisposed	8	pure
CY2022	tdw	Number Of Vessels Disposed NumberOfVesselsDisposed	8	pure
CY2021	tdw	Number Of Offshore Supply Vessels NumberOfOffshoreSupplyVessels	153	pure
CY2021	tdw	Number Of Vessels Disposed NumberOfVesselsDisposed	18	pure
CY2021	tdw	Number Of Vessels Disposed NumberOfVesselsDisposed	18	pure
CY2022	tdw	Alucat Crew Boats Expected Cost Each AlucatCrewBoatsExpectedCostEach	3500000	usd
CY2022	tdw	Down Payment To Start Construction On Crew Boats DownPaymentToStartConstructionOnCrewBoats	1200000	usd
CY2022Q4	tdw	Number Of Ocean Going Tugs Contracted To Build NumberOfOceanGoingTugsContractedToBuild	2	pure
CY2022Q4	tdw	Ocean Going Tugs Expected Cost Each OceanGoingTugsExpectedCostEach	6300000	usd
CY2022Q4	tdw	Down Payments To Start Construction On Tugboats DownPaymentsToStartConstructionOnTugboats	2300000	usd
CY2022	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	19842000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	-21749000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	-128969000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-196242000	usd
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	44132
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	41009
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	40355
CY2022	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0
CY2021	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0
CY2020	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	44132
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	41009
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	40355
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.49
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-3.14
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-4.86
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.49
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-3.14
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-4.86
CY2022	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	1863233
CY2021	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	2345948
CY2020	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	2235310
CY2022	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<p style="font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:left;"><b>Concentrations of Credit Risk </b></p> <p style="font-family: "Times New Roman", Times, serif; font-size: 10pt; margin: 0pt;"> </p> <p style="font-family: "Times New Roman", Times, serif; font-size: 10pt; margin: 0pt; text-align: justify;">Our financial instruments that are exposed to concentrations of credit risk consist primarily of trade and other receivables from a variety of domestic, international and national energy companies. We manage our exposure to risk by performing ongoing credit evaluations of our customers’ financial condition and <em style="font: inherit;"> may </em>at times require prepayments or other forms of collateral. In prior years, we had net receivable balances related to joint ventures in which we own less than <em style="font: inherit;">50%.</em> We review and evaluate these receivables for collectability in a similar manner as we evaluate trade receivables. We maintain an allowance for credit loss based on expected collectability and do <em style="font: inherit;">not</em> believe we are generally exposed to concentrations of credit risk that are likely to have a material adverse impact on our financial position, results of operations, or cash flows.</p>
CY2022	us-gaap	Other Comprehensive Income Reclassification Adjustment For Held To Maturity Transferred To Available For Sale Securities Before Tax OtherComprehensiveIncomeReclassificationAdjustmentForHeldToMaturityTransferredToAvailableForSaleSecuritiesBeforeTax	-500000	usd
CY2022	us-gaap	Government Assistance Amount GovernmentAssistanceAmount	1300000	usd
CY2022	tdw	Wage And Sick Cost Refund Amount WageAndSickCostRefundAmount	5300000	usd
CY2022Q4	us-gaap	Debt Instrument Unamortized Discount Premium Net DebtInstrumentUnamortizedDiscountPremiumNet	5964000	usd
CY2021Q4	us-gaap	Debt Instrument Unamortized Discount Premium Net DebtInstrumentUnamortizedDiscountPremiumNet	7115000	usd
CY2022Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	169036000	usd
CY2021Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	167885000	usd
CY2022	us-gaap	Interest And Debt Expense InterestAndDebtExpense	17413000	usd
CY2021	us-gaap	Interest And Debt Expense InterestAndDebtExpense	15607000	usd
CY2020	us-gaap	Interest And Debt Expense InterestAndDebtExpense	24156000	usd
CY2022	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	224000	usd
CY2021	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	24000	usd
CY2020	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	-0	usd
CY2022	us-gaap	Interest Costs Incurred InterestCostsIncurred	17189000	usd
CY2021	us-gaap	Interest Costs Incurred InterestCostsIncurred	15583000	usd
CY2020	us-gaap	Interest Costs Incurred InterestCostsIncurred	24156000	usd
CY2022	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	19850000	usd
CY2022Q4	us-gaap	Due From Related Parties Current DueFromRelatedPartiesCurrent	0	usd
CY2021Q4	us-gaap	Due From Related Parties Current DueFromRelatedPartiesCurrent	70134000	usd
CY2022Q4	us-gaap	Due To Related Parties Current DueToRelatedPartiesCurrent	0	usd
CY2021Q4	us-gaap	Due To Related Parties Current DueToRelatedPartiesCurrent	61555000	usd
CY2022Q4	us-gaap	Related Party Transaction Due From To Related Party Current RelatedPartyTransactionDueFromToRelatedPartyCurrent	0	usd
CY2021Q4	us-gaap	Related Party Transaction Due From To Related Party Current RelatedPartyTransactionDueFromToRelatedPartyCurrent	8579000	usd
CY2021Q4	us-gaap	Due To Affiliate Current And Noncurrent DueToAffiliateCurrentAndNoncurrent	40432000	usd
CY2020Q4	us-gaap	Due To Affiliate Current And Noncurrent DueToAffiliateCurrentAndNoncurrent	32767000	usd
CY2019Q4	us-gaap	Due To Affiliate Current And Noncurrent DueToAffiliateCurrentAndNoncurrent	31475000	usd
CY2022	tdw	Due To Affiliate Commisions To Be Paid DueToAffiliateCommisionsToBePaid	0	usd
CY2021	tdw	Due To Affiliate Commisions To Be Paid DueToAffiliateCommisionsToBePaid	3832000	usd
CY2020	tdw	Due To Affiliate Commisions To Be Paid DueToAffiliateCommisionsToBePaid	4152000	usd
CY2022	tdw	Due To Affiliate Amounts Paid By Affiliate DueToAffiliateAmountsPaidByAffiliate	0	usd
CY2021	tdw	Due To Affiliate Amounts Paid By Affiliate DueToAffiliateAmountsPaidByAffiliate	10914000	usd
CY2020	tdw	Due To Affiliate Amounts Paid By Affiliate DueToAffiliateAmountsPaidByAffiliate	9037000	usd
CY2022	tdw	Due To Related Party Amount Used To Offset Obligations DueToRelatedPartyAmountUsedToOffsetObligations	-0	usd
CY2021	tdw	Due To Related Party Amount Used To Offset Obligations DueToRelatedPartyAmountUsedToOffsetObligations	8530000	usd
CY2020	tdw	Due To Related Party Amount Used To Offset Obligations DueToRelatedPartyAmountUsedToOffsetObligations	11848000	usd
CY2022	tdw	Write Off Due To Affiliates WriteOffDueToAffiliates	40432000	usd
CY2021	tdw	Write Off Due To Affiliates WriteOffDueToAffiliates	-0	usd
CY2020	tdw	Write Off Due To Affiliates WriteOffDueToAffiliates	-0	usd
CY2022	tdw	Due To Affiliate Other Increase Decrease DueToAffiliateOtherIncreaseDecrease	0	usd
CY2021	tdw	Due To Affiliate Other Increase Decrease DueToAffiliateOtherIncreaseDecrease	1449000	usd
CY2020	tdw	Due To Affiliate Other Increase Decrease DueToAffiliateOtherIncreaseDecrease	-49000	usd
CY2022Q4	us-gaap	Due To Affiliate Current And Noncurrent DueToAffiliateCurrentAndNoncurrent	0	usd
CY2021Q4	us-gaap	Due To Affiliate Current And Noncurrent DueToAffiliateCurrentAndNoncurrent	40432000	usd
CY2020Q4	us-gaap	Due To Affiliate Current And Noncurrent DueToAffiliateCurrentAndNoncurrent	32767000	usd
CY2022	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	0	usd
CY2022	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	0	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	41408000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	-58476000	usd
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	-137225000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-43715000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-65309000	usd
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-60436000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-2307000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-123785000	usd
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-197661000	usd
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-21005000	usd
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	0	usd
CY2020	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	18816000	usd
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-2189000	usd
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-30000	usd
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	0	usd
CY2020	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	1254000	usd
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	1224000	usd
CY2020	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	-21035000	usd
CY2020	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	0	usd
CY2020	us-gaap	Foreign Income Tax Expense Benefit Continuing Operations ForeignIncomeTaxExpenseBenefitContinuingOperations	20070000	usd
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-965000	usd
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	682000	usd
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	0	usd
CY2021	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	6480000	usd
CY2021	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	7162000	usd
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-1418000	usd
CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	0	usd
CY2021	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	131000	usd
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-1287000	usd
CY2021	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	-736000	usd
CY2021	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	0	usd
CY2021	us-gaap	Foreign Income Tax Expense Benefit Continuing Operations ForeignIncomeTaxExpenseBenefitContinuingOperations	6611000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5875000	usd
CY2022	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	usd
CY2022	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	8000	usd
CY2022	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	36000	usd
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	36000	usd
CY2022	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	0	usd
CY2022	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	8000	usd
CY2022	us-gaap	Foreign Income Tax Expense Benefit Continuing Operations ForeignIncomeTaxExpenseBenefitContinuingOperations	19878000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	19886000	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21	pure
CY2022	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-484000	usd
CY2021	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-25995000	usd
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-41509000	usd
CY2022	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-7240000	usd
CY2021	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	10984000	usd
CY2020	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	27639000	usd
CY2022	tdw	Income Tax Reconciliation Uncertain Tax Position IncomeTaxReconciliationUncertainTaxPosition	-7885000	usd
CY2021	tdw	Income Tax Reconciliation Uncertain Tax Position IncomeTaxReconciliationUncertainTaxPosition	-25417000	usd
CY2020	tdw	Income Tax Reconciliation Uncertain Tax Position IncomeTaxReconciliationUncertainTaxPosition	-62833000	usd
CY2022	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	5410000	usd
CY2021	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	0	usd
CY2020	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	0	usd
CY2022	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	11339000	usd
CY2021	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	34566000	usd
CY2020	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	43455000	usd
CY2022	tdw	Effective Income Tax Rate Reconciliation Deferred Tax True Up Valuation Allowance Amount EffectiveIncomeTaxRateReconciliationDeferredTaxTrueUpValuationAllowanceAmount	-453000	usd
CY2021	tdw	Effective Income Tax Rate Reconciliation Deferred Tax True Up Valuation Allowance Amount EffectiveIncomeTaxRateReconciliationDeferredTaxTrueUpValuationAllowanceAmount	29711000	usd
CY2020	tdw	Effective Income Tax Rate Reconciliation Deferred Tax True Up Valuation Allowance Amount EffectiveIncomeTaxRateReconciliationDeferredTaxTrueUpValuationAllowanceAmount	-6523000	usd
CY2022	tdw	Effective Income Tax Rate Reconciliation Deferred Tax True Up Amount EffectiveIncomeTaxRateReconciliationDeferredTaxTrueUpAmount	453000	usd
CY2021	tdw	Effective Income Tax Rate Reconciliation Deferred Tax True Up Amount EffectiveIncomeTaxRateReconciliationDeferredTaxTrueUpAmount	-29789000	usd
CY2020	tdw	Effective Income Tax Rate Reconciliation Deferred Tax True Up Amount EffectiveIncomeTaxRateReconciliationDeferredTaxTrueUpAmount	6523000	usd
CY2022	tdw	Income Tax Reconciliation Increase Decrease In Foreign Taxes IncomeTaxReconciliationIncreaseDecreaseInForeignTaxes	-27945000	usd
CY2021	tdw	Income Tax Reconciliation Increase Decrease In Foreign Taxes IncomeTaxReconciliationIncreaseDecreaseInForeignTaxes	-15220000	usd
CY2020	tdw	Income Tax Reconciliation Increase Decrease In Foreign Taxes IncomeTaxReconciliationIncreaseDecreaseInForeignTaxes	-12520000	usd
CY2022	tdw	Income Tax Reconciliation Return To Accrual IncomeTaxReconciliationReturnToAccrual	-12162000	usd
CY2021	tdw	Income Tax Reconciliation Return To Accrual IncomeTaxReconciliationReturnToAccrual	-7691000	usd
CY2020	tdw	Income Tax Reconciliation Return To Accrual IncomeTaxReconciliationReturnToAccrual	11401000	usd
CY2022	tdw	Income Tax Reconciliation Executive Compensation IncomeTaxReconciliationExecutiveCompensation	552000	usd
CY2021	tdw	Income Tax Reconciliation Executive Compensation IncomeTaxReconciliationExecutiveCompensation	125000	usd
CY2020	tdw	Income Tax Reconciliation Executive Compensation IncomeTaxReconciliationExecutiveCompensation	286000	usd
CY2022	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	-3495000	usd
CY2021	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	-484000	usd
CY2020	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	-5631000	usd
CY2022Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	29009000	usd
CY2022	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-1084000	usd
CY2021	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	3677000	usd
CY2020	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	2445000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	19886000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5875000	usd
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-965000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	8726000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	7275000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	991000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	649000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	448624000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	215797000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Restructuring Charges DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsRestructuringCharges	0	usd
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Restructuring Charges DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsRestructuringCharges	566000	usd
CY2022Q4	us-gaap	Deferred Tax Asset Interest Carryforward DeferredTaxAssetInterestCarryforward	10935000	usd
CY2021Q4	us-gaap	Deferred Tax Asset Interest Carryforward DeferredTaxAssetInterestCarryforward	10386000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Capital Loss Carryforwards DeferredTaxAssetsCapitalLossCarryforwards	2027000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Capital Loss Carryforwards DeferredTaxAssetsCapitalLossCarryforwards	0	usd
CY2022Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	2656000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	3152000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	473959000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	237825000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	441893000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	204899000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	32066000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	32926000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	30959000	usd
CY2021Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	31745000	usd
CY2022Q4	tdw	Deferred Tax Liability Outside Basis Difference DeferredTaxLiabilityOutsideBasisDifference	2891000	usd
CY2021Q4	tdw	Deferred Tax Liability Outside Basis Difference DeferredTaxLiabilityOutsideBasisDifference	2891000	usd
CY2022Q4	tdw	Deferred Tax Liabilities Foreign Interest Withholding Tax DeferredTaxLiabilitiesForeignInterestWithholdingTax	1072000	usd
CY2021Q4	tdw	Deferred Tax Liabilities Foreign Interest Withholding Tax DeferredTaxLiabilitiesForeignInterestWithholdingTax	990000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	-692000	usd
CY2021Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	-572000	usd
CY2022Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	34230000	usd
CY2021Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	35054000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	2164000	usd
CY2021Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	2128000	usd
CY2021	tdw	Annual Limitation Of Companys Ownership Change AnnualLimitationOfCompanysOwnershipChange	15000000.0	usd
CY2022Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	441900000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	204900000	usd
CY2022Q4	us-gaap	Undistributed Earnings Of Foreign Subsidiaries UndistributedEarningsOfForeignSubsidiaries	71100000	usd
CY2022Q4	us-gaap	Liability For Uncertain Tax Positions Noncurrent LiabilityForUncertainTaxPositionsNoncurrent	35468000	usd
CY2021Q4	us-gaap	Liability For Uncertain Tax Positions Noncurrent LiabilityForUncertainTaxPositionsNoncurrent	29283000	usd
CY2021Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	11480000	usd
CY2022Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	1502000	usd
CY2021Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	1322000	usd
CY2022Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued	15800000	usd
CY2021Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued	17800000	usd
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	414042000	usd
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	2223000	usd
CY2020	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	64458000	usd
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	760000	usd
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	351047000	usd
CY2021	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	53000	usd
CY2021	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	18515000	usd
CY2021	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	35962000	usd
CY2021Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	333653000	usd
CY2022	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	744000	usd
CY2022	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	10155000	usd
CY2022	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	167170000	usd
CY2022Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	177382000	usd
CY2022Q4	tdw	Foreign Tax Credits And Other Tax Attributes ForeignTaxCreditsAndOtherTaxAttributes	157700000	usd
CY2022	us-gaap	Unrecognized Tax Benefits Period Increase Decrease UnrecognizedTaxBenefitsPeriodIncreaseDecrease	11900000	usd
CY2022Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	22500000	usd
CY2021Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	29300000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	3081000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	1872000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	1457000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	1170000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	586000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	1288000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	9454000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	1838000	usd
CY2022	us-gaap	Operating Lease Cost OperatingLeaseCost	1485000	usd
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	1369000	usd
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	1270000	usd
CY2022	us-gaap	Short Term Lease Cost ShortTermLeaseCost	3088000	usd
CY2021	us-gaap	Short Term Lease Cost ShortTermLeaseCost	2529000	usd
CY2020	us-gaap	Short Term Lease Cost ShortTermLeaseCost	3483000	usd
CY2022	us-gaap	Variable Lease Cost VariableLeaseCost	494000	usd
CY2021	us-gaap	Variable Lease Cost VariableLeaseCost	412000	usd
CY2020	us-gaap	Variable Lease Cost VariableLeaseCost	392000	usd
CY2022	us-gaap	Lease Cost LeaseCost	5067000	usd
CY2021	us-gaap	Lease Cost LeaseCost	4310000	usd
CY2020	us-gaap	Lease Cost LeaseCost	5145000	usd
CY2022Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P3Y1M6D
CY2022Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.076	pure
CY2022	us-gaap	Operating Lease Payments OperatingLeasePayments	2400000	usd
CY2021	us-gaap	Operating Lease Payments OperatingLeasePayments	1800000	usd
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	1000000.0	usd
CY2022	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	5000000.0	usd
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	300000	usd
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	300000	usd
CY2019	tdw	Number Of Vessels Held For Sale Addition NumberOfVesselsHeldForSaleAddition	46	pure
CY2020	tdw	Number Of Vessels Held For Sale Addition NumberOfVesselsHeldForSaleAddition	32	pure
CY2020	tdw	Number Of Vessels Held For Sale Sold NumberOfVesselsHeldForSaleSold	53	pure
CY2020Q4	tdw	Number Of Vessels Held For Sale NumberOfVesselsHeldForSale	23	pure
CY2020	tdw	Number Of Active Vessels Sold NumberOfActiveVesselsSold	3	pure
CY2021	tdw	Number Of Vessels Sold NumberOfVesselsSold	9	pure
CY2021	tdw	Number Of Vessels Held For Sale Addition NumberOfVesselsHeldForSaleAddition	7	pure
CY2021	tdw	Number Of Vessels Transfer From Held For Sale To Active Fleet NumberOfVesselsTransferFromHeldForSaleToActiveFleet	3	pure
CY2021Q4	tdw	Number Of Vessels Held For Sale NumberOfVesselsHeldForSale	18	pure
CY2021	tdw	Number Of Active Vessels Sold NumberOfActiveVesselsSold	10	pure
CY2022	tdw	Number Of Vessels Sold NumberOfVesselsSold	12	pure
CY2022	tdw	Number Of Vessels Held For Sale Addition NumberOfVesselsHeldForSaleAddition	3	pure
CY2022	tdw	Number Of Vessels Transfer From Held For Sale To Active Fleet NumberOfVesselsTransferFromHeldForSaleToActiveFleet	1	pure
CY2022Q4	tdw	Number Of Vessels Held For Sale NumberOfVesselsHeldForSale	8	pure
CY2022	tdw	Proceeds From Sale Of Vessels And Other Assets ProceedsFromSaleOfVesselsAndOtherAssets	13600000	usd
CY2021	tdw	Proceeds From Sale Of Vessels And Other Assets ProceedsFromSaleOfVesselsAndOtherAssets	34000000.0	usd
CY2020	tdw	Proceeds From Sale Of Vessels And Other Assets ProceedsFromSaleOfVesselsAndOtherAssets	38300000	usd
CY2021	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	0	usd
CY2019Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	91654000	usd
CY2021	us-gaap	Impairment Of Long Lived Assets To Be Disposed Of ImpairmentOfLongLivedAssetsToBeDisposedOf	13700000	usd
CY2020	us-gaap	Impairment Of Long Lived Assets To Be Disposed Of ImpairmentOfLongLivedAssetsToBeDisposedOf	75200000	usd
CY2022	tdw	Impairment Charge Recaptured ImpairmentChargeRecaptured	500000	usd
CY2021	tdw	Impairment Charge Recaptured ImpairmentChargeRecaptured	1700000	usd
CY2020	tdw	Impairment Charge Recaptured ImpairmentChargeRecaptured	1000000.0	usd
CY2020Q4	tdw	Expense Recovered On Contract To Shipyard ExpenseRecoveredOnContractToShipyard	4000000.0	usd
CY2022	tdw	Number Of Vessels Held For Sale Reactivation NumberOfVesselsHeldForSaleReactivation	1	pure
CY2021	tdw	Number Of Vessels Held For Sale Reactivation NumberOfVesselsHeldForSaleReactivation	1	pure
CY2020	tdw	Number Of Vessels Held For Sale Reactivation NumberOfVesselsHeldForSaleReactivation	0	pure
CY2022	us-gaap	Asset Impairment Charges AssetImpairmentCharges	714000	usd
CY2021	us-gaap	Asset Impairment Charges AssetImpairmentCharges	15643000	usd
CY2020	us-gaap	Asset Impairment Charges AssetImpairmentCharges	74109000	usd
CY2022Q4	tdw	Defined Benefit Plan Concentration Risk Assets Equity Securities Difference Plan Assets And Liabilities DefinedBenefitPlanConcentrationRiskAssetsEquitySecuritiesDifferencePlanAssetsAndLiabilities	0.25	pure
CY2022	us-gaap	Defined Benefit Plan Plan Assets Level3 Reconciliation Increase For Purchase DefinedBenefitPlanPlanAssetsLevel3ReconciliationIncreaseForPurchase	3000000.0	usd
CY2021Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	84308000	usd
CY2020Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	88960000	usd
CY2022	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	0	usd
CY2021Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	25951000	usd
CY2020	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	112000	usd
CY2022	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	2313000	usd
CY2021	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	2168000	usd
CY2020	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	2907000	usd
CY2022	us-gaap	Defined Benefit Plan Benefit Obligation Benefits Paid DefinedBenefitPlanBenefitObligationBenefitsPaid	5667000	usd
CY2021	us-gaap	Defined Benefit Plan Benefit Obligation Benefits Paid DefinedBenefitPlanBenefitObligationBenefitsPaid	5693000	usd
CY2020	us-gaap	Defined Benefit Plan Benefit Obligation Benefits Paid DefinedBenefitPlanBenefitObligationBenefitsPaid	5990000	usd
CY2022	us-gaap	Defined Benefit Plan Actuarial Gain Loss DefinedBenefitPlanActuarialGainLoss	16681000	usd
CY2021	us-gaap	Defined Benefit Plan Actuarial Gain Loss DefinedBenefitPlanActuarialGainLoss	1127000	usd
CY2020	us-gaap	Defined Benefit Plan Actuarial Gain Loss DefinedBenefitPlanActuarialGainLoss	-5277000	usd
CY2022	us-gaap	Defined Benefit Plan Settlements Benefit Obligation DefinedBenefitPlanSettlementsBenefitObligation	-0	usd
CY2021	us-gaap	Defined Benefit Plan Settlements Benefit Obligation DefinedBenefitPlanSettlementsBenefitObligation	-0	usd
CY2020	us-gaap	Defined Benefit Plan Settlements Benefit Obligation DefinedBenefitPlanSettlementsBenefitObligation	4407000	usd
CY2022	us-gaap	Defined Benefit Plan Foreign Currency Exchange Rate Changes Benefit Obligation DefinedBenefitPlanForeignCurrencyExchangeRateChangesBenefitObligation	-0	usd
CY2021	us-gaap	Defined Benefit Plan Foreign Currency Exchange Rate Changes Benefit Obligation DefinedBenefitPlanForeignCurrencyExchangeRateChangesBenefitObligation	-0	usd
CY2020	us-gaap	Defined Benefit Plan Foreign Currency Exchange Rate Changes Benefit Obligation DefinedBenefitPlanForeignCurrencyExchangeRateChangesBenefitObligation	593000	usd
CY2022Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	64273000	usd
CY2021Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	84308000	usd
CY2020Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	88960000	usd
CY2021Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	56779000	usd
CY2020Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	56495000	usd
CY2019Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	59625000	usd
CY2022	us-gaap	Defined Benefit Plan Actual Return On Plan Assets DefinedBenefitPlanActualReturnOnPlanAssets	-7337000	usd
CY2021	us-gaap	Defined Benefit Plan Actual Return On Plan Assets DefinedBenefitPlanActualReturnOnPlanAssets	4374000	usd
CY2020	us-gaap	Defined Benefit Plan Actual Return On Plan Assets DefinedBenefitPlanActualReturnOnPlanAssets	6890000	usd
CY2022	tdw	Defined Benefit Plan Plan Assets Actuarial Gain Loss DefinedBenefitPlanPlanAssetsActuarialGainLoss	0	usd
CY2021	tdw	Defined Benefit Plan Plan Assets Actuarial Gain Loss DefinedBenefitPlanPlanAssetsActuarialGainLoss	0	usd
CY2020	tdw	Defined Benefit Plan Plan Assets Actuarial Gain Loss DefinedBenefitPlanPlanAssetsActuarialGainLoss	18000	usd
CY2022	tdw	Defined Benefit Plan Administrative Expenses DefinedBenefitPlanAdministrativeExpenses	-0	usd
CY2021	tdw	Defined Benefit Plan Administrative Expenses DefinedBenefitPlanAdministrativeExpenses	-0	usd
CY2020	tdw	Defined Benefit Plan Administrative Expenses DefinedBenefitPlanAdministrativeExpenses	49000	usd
CY2022	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	1603000	usd
CY2021	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	1603000	usd
CY2020	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	1615000	usd
CY2022	us-gaap	Defined Benefit Plan Plan Assets Benefits Paid DefinedBenefitPlanPlanAssetsBenefitsPaid	5667000	usd
CY2021	us-gaap	Defined Benefit Plan Plan Assets Benefits Paid DefinedBenefitPlanPlanAssetsBenefitsPaid	5693000	usd
CY2020	us-gaap	Defined Benefit Plan Plan Assets Benefits Paid DefinedBenefitPlanPlanAssetsBenefitsPaid	5990000	usd
CY2022	us-gaap	Defined Benefit Plan Settlements Plan Assets DefinedBenefitPlanSettlementsPlanAssets	-0	usd
CY2021	us-gaap	Defined Benefit Plan Settlements Plan Assets DefinedBenefitPlanSettlementsPlanAssets	-0	usd
CY2020	us-gaap	Defined Benefit Plan Settlements Plan Assets DefinedBenefitPlanSettlementsPlanAssets	5000000	usd
CY2022	us-gaap	Defined Benefit Plan Plan Assets Foreign Currency Translation Gain Loss DefinedBenefitPlanPlanAssetsForeignCurrencyTranslationGainLoss	0	usd
CY2021	us-gaap	Defined Benefit Plan Plan Assets Foreign Currency Translation Gain Loss DefinedBenefitPlanPlanAssetsForeignCurrencyTranslationGainLoss	0	usd
CY2020	us-gaap	Defined Benefit Plan Plan Assets Foreign Currency Translation Gain Loss DefinedBenefitPlanPlanAssetsForeignCurrencyTranslationGainLoss	-614000	usd
CY2022Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	45378000	usd
CY2021Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	56779000	usd
CY2020Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	56495000	usd
CY2022	tdw	Defined Benefit Plan Unfunded Status Of Plan DefinedBenefitPlanUnfundedStatusOfPlan	18895000	usd
CY2021	tdw	Defined Benefit Plan Unfunded Status Of Plan DefinedBenefitPlanUnfundedStatusOfPlan	27529000	usd
CY2020	tdw	Defined Benefit Plan Unfunded Status Of Plan DefinedBenefitPlanUnfundedStatusOfPlan	32465000	usd
CY2022Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Current Liabilities PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities	1575000	usd
CY2021Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Current Liabilities PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities	1578000	usd
CY2020Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Current Liabilities PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities	1524000	usd
CY2022Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	17320000	usd
CY2020Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	30941000	usd
CY2022Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Current And Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent	18895000	usd
CY2021Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Current And Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent	27529000	usd
CY2020Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Current And Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent	32465000	usd
CY2022Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	64273000	usd
CY2021Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	84308000	usd
CY2022Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	45378000	usd
CY2021Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	56779000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-6404000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-3472000	usd
CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-568000	usd
CY2022Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate	0.0547	pure
CY2021Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate	0.0285	pure
CY2022Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Next Twelve Months DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths	5841000	usd
CY2022Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Two DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo	5792000	usd
CY2022Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Three DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree	5727000	usd
CY2022Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Four DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour	5634000	usd
CY2022Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Five DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive	5513000	usd
CY2022Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Five Fiscal Years Thereafter DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter	25440000	usd
CY2022Q4	tdw	Defined Benefit Plan Expected Future Benefit Payments DefinedBenefitPlanExpectedFutureBenefitPayments	53947000	usd
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	6473228
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	6473228
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	3973228
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	2466167
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	3037187
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	1591577
CY2022	tdw	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodGrantDateFairValue	3561000	usd
CY2021	tdw	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodGrantDateFairValue	4460000	usd
CY2020	tdw	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodGrantDateFairValue	6395000	usd
CY2022Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	125000000
CY2021Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	125000000
CY2022Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2021Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2022Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	50554179
CY2021Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	41307617
CY2022Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	3000000
CY2021Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	3000000
CY2022Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0
CY2021Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0
CY2022	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	0
CY2022	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	0	usd
CY2017	tdw	Class Of Warrant Or Right Issued During Period ClassOfWarrantOrRightIssuedDuringPeriod	11543814
CY2022Q4	us-gaap	Class Of Warrant Or Right Number Of Securities Called By Each Warrant Or Right ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight	1
CY2022Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	35425000	usd
CY2021Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	18627000	usd
CY2022Q4	tdw	Accrued Vessel Expenses AccruedVesselExpenses	47307000	usd
CY2022	us-gaap	Operating Income Loss OperatingIncomeLoss	26708000	usd
CY2021	us-gaap	Operating Income Loss OperatingIncomeLoss	-95016000	usd
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	-186802000	usd
CY2022	us-gaap	Depreciation And Amortization DepreciationAndAmortization	119160000	usd
CY2021	us-gaap	Depreciation And Amortization DepreciationAndAmortization	114544000	usd
CY2020	us-gaap	Depreciation And Amortization DepreciationAndAmortization	116709000	usd
CY2021Q4	tdw	Accrued Vessel Expenses AccruedVesselExpenses	19662000	usd
CY2022Q4	us-gaap	Interest Payable Current InterestPayableCurrent	2037000	usd
CY2021Q4	us-gaap	Interest Payable Current InterestPayableCurrent	1859000	usd
CY2022Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	20749000	usd
CY2021Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	11586000	usd
CY2022Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	105518000	usd
CY2021Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	51734000	usd
CY2022Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	39355000	usd
CY2021Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	18977000	usd
CY2022Q4	us-gaap	Other Sundry Liabilities Current OtherSundryLiabilitiesCurrent	10968000	usd
CY2021Q4	us-gaap	Other Sundry Liabilities Current OtherSundryLiabilitiesCurrent	4888000	usd
CY2022Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	50323000	usd
CY2021Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	23865000	usd
CY2022Q4	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	17383000	usd
CY2021Q4	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	26872000	usd
CY2022Q4	us-gaap	Liability For Uncertain Tax Positions Noncurrent LiabilityForUncertainTaxPositionsNoncurrent	35468000	usd
CY2021Q4	us-gaap	Liability For Uncertain Tax Positions Noncurrent LiabilityForUncertainTaxPositionsNoncurrent	29283000	usd
CY2022Q4	us-gaap	Other Sundry Liabilities Noncurrent OtherSundryLiabilitiesNoncurrent	14992000	usd
CY2021Q4	us-gaap	Other Sundry Liabilities Noncurrent OtherSundryLiabilitiesNoncurrent	12029000	usd
CY2022Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	67843000	usd
CY2021Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	68184000	usd
CY2022	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	5	pure
CY2022	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	647684000	usd
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	371033000	usd
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	397038000	usd
CY2022	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	250000	usd
CY2021	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	-2901000	usd
CY2020	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	7591000	usd
CY2022	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	-0	usd
CY2021	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	400000	usd
CY2020	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	52981000	usd
CY2022	us-gaap	Affiliate Costs AffiliateCosts	-0	usd
CY2021	us-gaap	Affiliate Costs AffiliateCosts	-0	usd
CY2020	us-gaap	Affiliate Costs AffiliateCosts	2000000	usd
CY2022	us-gaap	Asset Impairment Charges AssetImpairmentCharges	714000	usd
CY2021	us-gaap	Asset Impairment Charges AssetImpairmentCharges	15643000	usd
CY2020	us-gaap	Asset Impairment Charges AssetImpairmentCharges	74109000	usd
CY2022	us-gaap	Property Plant And Equipment Additions PropertyPlantAndEquipmentAdditions	16637000	usd
CY2021	us-gaap	Property Plant And Equipment Additions PropertyPlantAndEquipmentAdditions	8951000	usd
CY2020	us-gaap	Property Plant And Equipment Additions PropertyPlantAndEquipmentAdditions	14900000	usd
CY2022Q4	us-gaap	Assets Assets	1297656000	usd
CY2021Q4	us-gaap	Assets Assets	1095780000	usd
CY2020Q4	us-gaap	Assets Assets	1251177000	usd
CY2019Q4	us-gaap	Restructuring Reserve RestructuringReserve	4381000	usd
CY2020	us-gaap	Restructuring Charges RestructuringCharges	1501000	usd
CY2020	us-gaap	Payments For Restructuring PaymentsForRestructuring	2547000	usd
CY2022	tdw	Business Exit Costs And Severance Charges BusinessExitCostsAndSeveranceCharges	5700000	usd
CY2021	tdw	Business Exit Costs And Severance Charges BusinessExitCostsAndSeveranceCharges	200000	usd
CY2020	tdw	Business Exit Costs And Severance Charges BusinessExitCostsAndSeveranceCharges	1500000	usd
CY2020Q4	us-gaap	Restructuring Reserve RestructuringReserve	3335000	usd
CY2021	us-gaap	Restructuring Charges RestructuringCharges	174000	usd
CY2021	us-gaap	Payments For Restructuring PaymentsForRestructuring	2000000	usd
CY2021Q4	us-gaap	Restructuring Reserve RestructuringReserve	1509000	usd
CY2022	us-gaap	Restructuring Charges RestructuringCharges	5680000	usd
CY2022	us-gaap	Payments For Restructuring PaymentsForRestructuring	764000	usd
CY2022Q4	us-gaap	Restructuring Reserve RestructuringReserve	6425000	usd

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tdw20221231b_10k_htm.xml	Edgar Link	completed

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$TDW
TIDEWATER INC Stock $tdw

2023 Q1 Form 10-K Financial Statement

#000143774923004829 Filed on February 28, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$TDW TIDEWATER INC Stock $tdw

2023 Q1 Form 10-K Financial Statement

#000143774923004829 Filed on February 28, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$TDW
TIDEWATER INC Stock $tdw