$MTUS
Metallus Inc. Stock $mtus

$mtus Overview Financials Valuation SEC Filings Company Website

2023 Q1 Form 10-K Financial Statement

#000095017023004348 Filed on February 24, 2023

Income Statement

Concept	2023 Q1	2022 Q4	2022
Revenue	$323.5M	$245.4M	$1.330B
YoY Change	-8.1%	-27.46%	3.66%
Cost Of Revenue	$283.1M	$265.7M	$1.203B
YoY Change	-3.05%	-6.08%	13.2%
Gross Profit	$40.40M	-$20.30M	$126.7M
YoY Change	-32.67%	-136.64%	-42.41%
Gross Profit Margin	12.49%	-8.27%	9.53%
Selling, General & Admin	$21.00M	$17.40M	$73.80M
YoY Change	13.51%	3.57%	-4.4%
% of Gross Profit	51.98%		58.25%
Research & Development			$800.0K
YoY Change			-52.94%
% of Gross Profit			0.63%
Depreciation & Amortization	$14.50M	$14.60M	$58.30M
YoY Change	-0.68%	-2.67%	-7.61%
% of Gross Profit	35.89%		46.01%
Operating Expenses	$21.00M	$17.40M	$74.60M
YoY Change	13.51%	3.57%	-5.45%
Operating Profit	$19.40M	-$37.70M	$52.10M
YoY Change	-53.25%	-197.67%	-63.08%
Interest Expense	$700.0K	$1.000M	$3.900M
YoY Change	-41.67%	-183.33%	-33.9%
% of Operating Profit	3.61%		7.49%
Other Income/Expense, Net	$8.800M	$31.80M	$90.60M
YoY Change	-42.11%	1.92%	52.27%
Pretax Income	$18.20M	-$4.300M	$97.10M
YoY Change	-52.11%	-107.08%	-45.05%
Income Tax	$3.800M	$28.90M	$32.00M
% Of Pretax Income	20.88%		32.96%
Net Earnings	$14.40M	-$33.20M	$65.10M
YoY Change	-61.19%	-158.14%	-61.93%
Net Earnings / Revenue	4.45%	-13.53%	4.9%
Basic Earnings Per Share	$0.33		$1.42
Diluted Earnings Per Share	$0.30	-$0.75	$1.30
COMMON SHARES
Basic Shares Outstanding	43.90M	44.47M	45.80M
Diluted Shares Outstanding	48.70M		51.50M

Balance Sheet

Concept	2023 Q1	2022 Q4	2022
SHORT-TERM ASSETS
Cash & Short-Term Investments	$227.4M	$257.2M	$257.2M
YoY Change	-5.21%	-0.92%	-0.92%
Cash & Equivalents	$227.4M	$257.2M	$257.2M
Short-Term Investments
Other Short-Term Assets	$10.90M	$21.20M	$27.60M
YoY Change	395.45%	583.87%	144.25%
Inventory	$244.7M	$192.4M	$192.4M
Prepaid Expenses
Receivables	$127.1M	$79.40M	$79.40M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$614.7M	$556.6M	$556.6M
YoY Change	-0.08%	-4.41%	-4.41%
LONG-TERM ASSETS
Property, Plant & Equipment	$482.8M	$486.1M	$498.6M
YoY Change	-3.59%	-4.72%	-4.97%
Goodwill
YoY Change
Intangibles	$4.400M	$5.000M
YoY Change	-27.87%	-25.37%
Long-Term Investments
YoY Change
Other Assets	$2.400M	$2.400M	$21.80M
YoY Change	26.32%	14.29%	-51.77%
Total Long-Term Assets	$520.6M	$525.4M	$525.4M
YoY Change	-8.79%	-8.88%	-8.88%
TOTAL ASSETS
Total Short-Term Assets	$614.7M	$556.6M	$556.6M
Total Long-Term Assets	$520.6M	$525.4M	$525.4M
Total Assets	$1.135B	$1.082B	$1.082B
YoY Change	-4.27%	-6.64%	-6.64%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$173.3M	$113.2M	$113.2M
YoY Change	2.85%	-20.23%	-20.23%
Accrued Expenses	$24.80M	$29.20M	$29.20M
YoY Change	-15.93%	-39.04%	-39.04%
Deferred Revenue
YoY Change
Short-Term Debt	$13.10M	$20.40M	$20.40M
YoY Change	-62.78%	-54.57%	-54.57%
Long-Term Debt Due	$13.10M	$20.40M
YoY Change	-62.78%	-54.57%
Total Short-Term Liabilities	$231.0M	$186.7M	$186.7M
YoY Change	-6.17%	-25.56%	-25.56%
LONG-TERM LIABILITIES
Long-Term Debt	$0.00	$0.00	$0.00
YoY Change
Other Long-Term Liabilities	$14.40M	$13.50M	$182.9M
YoY Change	58.24%	42.11%	-24.2%
Total Long-Term Liabilities	$14.40M	$13.50M	$182.9M
YoY Change	58.24%	42.11%	-24.2%
TOTAL LIABILITIES
Total Short-Term Liabilities	$231.0M	$186.7M	$186.7M
Total Long-Term Liabilities	$14.40M	$13.50M	$182.9M
Total Liabilities	$443.9M	$395.5M	$395.5M
YoY Change	-8.06%	-19.99%	-19.99%
SHAREHOLDERS EQUITY
Retained Earnings	-$108.7M	-$123.1M
YoY Change	-28.06%	-34.59%
Common Stock	$839.5M	$847.0M
YoY Change	-0.1%	1.79%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$53.50M	$52.10M
YoY Change	1014.58%
Treasury Stock Shares	$3.100M	$3.000M
Shareholders Equity	$691.4M	$686.5M	$686.5M
YoY Change
Total Liabilities & Shareholders Equity	$1.135B	$1.082B	$1.082B
YoY Change	-4.27%	-6.64%	-6.64%

Cashflow Statement

Concept	2023 Q1	2022 Q4	2022
OPERATING ACTIVITIES
Net Income	$14.40M	-$33.20M	$65.10M
YoY Change	-61.19%	-158.14%	-61.93%
Depreciation, Depletion And Amortization	$14.50M	$14.60M	$58.30M
YoY Change	-0.68%	-2.67%	-7.61%
Cash From Operating Activities	$9.800M	$23.70M	$134.5M
YoY Change	-26.32%	-73.87%	-31.69%
INVESTING ACTIVITIES
Capital Expenditures	$10.60M	$11.40M	$27.10M
YoY Change	-263.08%	-332.65%	-322.13%
Acquisitions
YoY Change
Other Investing Activities	$1.500M	$2.400M	$5.400M
YoY Change		140.0%	-27.03%
Cash From Investing Activities	-$9.100M	-$9.000M	-$21.70M
YoY Change	40.0%	130.77%	352.08%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net			$52.00M
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-30.20M	-20.10M	-114.6M
YoY Change	18.43%	-2612.5%	224.65%
NET CHANGE
Cash From Operating Activities	9.800M	23.70M	134.5M
Cash From Investing Activities	-9.100M	-9.000M	-21.70M
Cash From Financing Activities	-30.20M	-20.10M	-114.6M
Net Change In Cash	-29.50M	-5.400M	-1.800M
YoY Change	57.75%	-106.16%	-101.15%
FREE CASH FLOW
Cash From Operating Activities	$9.800M	$23.70M	$134.5M
Capital Expenditures	$10.60M	$11.40M	$27.10M
Free Cash Flow	-$800.0K	$12.30M	$107.4M
YoY Change	-104.04%	-87.13%	-48.64%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value
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CY2022	dei	Entity Central Index Key EntityCentralIndexKey	0001598428
CY2022	dei	Amendment Flag AmendmentFlag	false
CY2021Q1	us-gaap	Impairment Long Lived Asset Held For Use Statement Of Income Or Comprehensive Income Extensible Enumeration ImpairmentLongLivedAssetHeldForUseStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration	http://fasb.org/us-gaap/2022#AssetImpairmentCharges
CY2022	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2022	us-gaap	Open Tax Year OpenTaxYear	2019 2020 2021 2022
CY2022Q4	us-gaap	Lessee Operating Lease Renewal Term LesseeOperatingLeaseRenewalTerm	P1Y
CY2022	dei	Document Type DocumentType	10-K
CY2022	dei	Document Annual Report DocumentAnnualReport	true
CY2022	dei	Document Period End Date DocumentPeriodEndDate	2022-12-31
CY2022	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2022
CY2022	dei	Document Transition Report DocumentTransitionReport	false
CY2022	dei	Entity File Number EntityFileNumber	1-36313
CY2022	dei	Entity Registrant Name EntityRegistrantName	TIMKENSTEEL CORPORATION
CY2022	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	OH
CY2022	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	46-4024951
CY2022	dei	Entity Address Address Line1 EntityAddressAddressLine1	1835 Dueber Avenue SW
CY2022	dei	Entity Address City Or Town EntityAddressCityOrTown	Canton
CY2022	dei	Entity Address State Or Province EntityAddressStateOrProvince	OH
CY2022	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	44706
CY2022	dei	City Area Code CityAreaCode	330
CY2022	dei	Local Phone Number LocalPhoneNumber	471.7000
CY2022	dei	Security12b Title Security12bTitle	Common shares
CY2022	dei	Trading Symbol TradingSymbol	TMST
CY2022	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2022	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2022	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
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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	839412924
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CY2022	dei	Auditor Location AuditorLocation	Cleveland, Ohio
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CY2021Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	832100000
CY2022Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-123100000
CY2021Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-188200000
CY2022Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	3000000.0
CY2021Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	0
CY2022Q4	us-gaap	Treasury Stock Value TreasuryStockValue	52100000
CY2021Q4	us-gaap	Treasury Stock Value TreasuryStockValue	0
CY2022Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	14700000
CY2021Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	20700000
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	686500000
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	664600000
CY2022Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1082000000.0
CY2021Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1158900000
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	563100000
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-61900000
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-4300000
CY2020	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	6600000
CY2020	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	600000
CY2020	us-gaap	Adjustments To Additional Paid In Capital Equity Component Of Convertible Debt AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt	4600000
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	507500000
CY2021	us-gaap	Net Income Loss NetIncomeLoss	171000000.0
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-19700000
CY2021	us-gaap	Adjustments To Additional Paid In Capital Equity Component Of Convertible Debt AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt	1300000
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	664600000
CY2022	us-gaap	Net Income Loss NetIncomeLoss	65100000
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-6000000.0
CY2022	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	8800000
CY2022	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	8000000.0
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	196900000
CY2022	tmst	Treasury Stock Value Acquired TreasuryStockValueAcquired	-52000000.0
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	173500000
CY2022	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	27100000
CY2021	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	12200000
CY2022	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	2000000.0
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	686500000
CY2022	us-gaap	Net Income Loss NetIncomeLoss	65100000
CY2021	us-gaap	Net Income Loss NetIncomeLoss	171000000.0
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-61900000
CY2022	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	58300000
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	63100000
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	70000000.0
CY2022	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	700000
CY2021	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	1000000.0
CY2020	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	5300000
CY2022	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-43100000
CY2021	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0
CY2020	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-900000
CY2022	tmst	Gain Loss On Sale Of Consolidated Subsidiary GainLossOnSaleOfConsolidatedSubsidiary	0
CY2021	tmst	Gain Loss On Sale Of Consolidated Subsidiary GainLossOnSaleOfConsolidatedSubsidiary	-1100000
CY2020	tmst	Gain Loss On Sale Of Consolidated Subsidiary GainLossOnSaleOfConsolidatedSubsidiary	0
CY2022	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	-1900000
CY2021	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	-1300000
CY2020	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	2400000
CY2022	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0
CY2021	us-gaap	Asset Impairment Charges AssetImpairmentCharges	10600000
CY2020	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0
CY2022	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-24900000
CY2021	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-1200000
CY2020	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-0
CY2022	us-gaap	Share Based Compensation ShareBasedCompensation	8800000
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	7300000
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	6600000
CY2022	tmst	Pension And Other Postretirement Benefits Expense Reversal Of Expense Noncash Excluding Mark To Market Adjustments PensionAndOtherPostretirementBenefitsExpenseReversalOfExpenseNoncashExcludingMarkToMarketAdjustments	-40500000
CY2021	tmst	Pension And Other Postretirement Benefits Expense Reversal Of Expense Noncash Excluding Mark To Market Adjustments PensionAndOtherPostretirementBenefitsExpenseReversalOfExpenseNoncashExcludingMarkToMarketAdjustments	-38700000
CY2020	tmst	Pension And Other Postretirement Benefits Expense Reversal Of Expense Noncash Excluding Mark To Market Adjustments PensionAndOtherPostretirementBenefitsExpenseReversalOfExpenseNoncashExcludingMarkToMarketAdjustments	8600000
CY2022	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-21300000
CY2021	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	37200000
CY2020	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-14200000
CY2022	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-18800000
CY2021	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	41600000
CY2020	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-103500000
CY2022	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-33200000
CY2021	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	53500000
CY2020	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	23100000
CY2022	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-8800000
CY2021	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	9700000
CY2020	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	9400000
CY2022	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	2600000
CY2021	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	-100000
CY2020	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	700000
CY2022	us-gaap	Pension And Other Postretirement Benefit Contributions PensionAndOtherPostretirementBenefitContributions	5400000
CY2021	us-gaap	Pension And Other Postretirement Benefit Contributions PensionAndOtherPostretirementBenefitContributions	6900000
CY2020	us-gaap	Pension And Other Postretirement Benefit Contributions PensionAndOtherPostretirementBenefitContributions	4100000
CY2022	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	17900000
CY2021	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-1400000
CY2020	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-1000000.0
CY2022	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	134500000
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	257800000
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	259600000
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1282900000
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	830700000
CY2022Q4	tmst	Contract Liabalities Totalated ContractLiabalitiesTotalated	3600000
CY2020	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	16900000
CY2022	us-gaap	Proceeds From Divestiture Of Interest In Consolidated Subsidiaries ProceedsFromDivestitureOfInterestInConsolidatedSubsidiaries	0
CY2021	us-gaap	Proceeds From Divestiture Of Interest In Consolidated Subsidiaries ProceedsFromDivestitureOfInterestInConsolidatedSubsidiaries	6200000
CY2020	us-gaap	Proceeds From Divestiture Of Interest In Consolidated Subsidiaries ProceedsFromDivestitureOfInterestInConsolidatedSubsidiaries	0
CY2022	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	5400000
CY2021	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	1200000
CY2020	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	10900000
CY2022	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-21700000
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-4800000
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-6000000.0
CY2022	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	52000000.0
CY2021	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0
CY2022	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	8000000.0
CY2021	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	4100000
CY2020	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	0
CY2022	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	2000000.0
CY2021	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	500000
CY2020	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	600000
CY2022	us-gaap	Repayments Of Convertible Debt RepaymentsOfConvertibleDebt	67600000
CY2021	us-gaap	Repayments Of Convertible Debt RepaymentsOfConvertibleDebt	38900000
CY2020	us-gaap	Repayments Of Convertible Debt RepaymentsOfConvertibleDebt	0
CY2022	us-gaap	Repayments Of Long Term Lines Of Credit RepaymentsOfLongTermLinesOfCredit	0
CY2021	us-gaap	Repayments Of Long Term Lines Of Credit RepaymentsOfLongTermLinesOfCredit	0
CY2020	us-gaap	Repayments Of Long Term Lines Of Credit RepaymentsOfLongTermLinesOfCredit	90000000.0
CY2022	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	1000000.0
CY2021	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	0
CY2020	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	1200000
CY2022	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-114600000
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-35300000
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-91800000
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-1800000
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	156800000
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	75700000
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	259600000
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	102800000
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	27100000
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	257800000
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	259600000
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	102800000
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	257200000
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	259600000
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	102800000
CY2022Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	600000
CY2021Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	0
CY2020Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	0
CY2021Q4	tmst	Contract Liabalities Totalated ContractLiabalitiesTotalated	100000
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	102800000
CY2021Q1	tmst	Annual Melt Capacity AnnualMeltCapacity	2000000
CY2022	us-gaap	Restructuring Charges RestructuringCharges	800000
CY2021Q1	tmst	Annual Shipment Capacity AnnualShipmentCapacity	1500000
CY2021	us-gaap	Restructuring Charges RestructuringCharges	6700000
CY2020	us-gaap	Restructuring Charges RestructuringCharges	3100000
CY2022	tmst	Annual Melt Capacity AnnualMeltCapacity	1200000
CY2022	tmst	Annual Shipment Capacity AnnualShipmentCapacity	900000
CY2021	us-gaap	Severance Costs1 SeveranceCosts1	6400000
CY2021	us-gaap	Business Exit Costs1 BusinessExitCosts1	300000
CY2022Q4	us-gaap	Restricted Cash RestrictedCash	600000
CY2022	us-gaap	Guarantees Indemnifications And Warranties Policies GuaranteesIndemnificationsAndWarrantiesPolicies	<p style="text-indent:0.0%;font-size:10.0pt;margin-top:9.75pt;font-family:Times New Roman;margin-bottom:0.0pt;text-align:left;"><span style="background-color:rgba(0,0,0,0);color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:bold;font-size:10.0pt;font-family:"Calibri", sans-serif;font-style:italic;min-width:fit-content;">Product Warranties:</span></p><p style="text-indent:0.0%;font-size:10.0pt;margin-top:9.75pt;font-family:Times New Roman;margin-bottom:0.0pt;text-align:left;"><span style="background-color:rgba(0,0,0,0);color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:normal;font-size:10.0pt;font-family:"Calibri", sans-serif;min-width:fit-content;">TimkenSteel accrues liabilities for warranties based upon specific claim incidents in accordance with accounting rules relating to contingent liabilities. Should TimkenSteel become aware of a specific potential warranty claim for which liability is probable and reasonably estimable, a specific charge is recorded and accounted for accordingly.</span><span style="background-color:rgba(0,0,0,0);color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:normal;font-size:10.0pt;font-family:"Calibri", sans-serif;min-width:fit-content;"> TimkenSteel had warranty claims in the amount of $</span><span style="font-size:10.0pt;font-family:"Calibri", sans-serif;background-color:rgba(0,0,0,0);color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:normal;font-size:10.0pt;font-family:"Calibri", sans-serif;min-width:fit-content;">0.7</span><span style="background-color:rgba(0,0,0,0);color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:normal;font-size:10.0pt;font-family:"Calibri", sans-serif;min-width:fit-content;"> million and $</span><span style="font-size:10.0pt;font-family:"Calibri", sans-serif;background-color:rgba(0,0,0,0);color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:normal;font-size:10.0pt;font-family:"Calibri", sans-serif;min-width:fit-content;">1.4</span><span style="background-color:rgba(0,0,0,0);color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:normal;font-size:10.0pt;font-family:"Calibri", sans-serif;min-width:fit-content;"> million for the years ended December 31, 2022 and December 31, 2021, respectively. TimkenSteel had </span><span style="font-size:10.0pt;font-family:"Calibri", sans-serif;background-color:rgba(0,0,0,0);color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:normal;font-size:10.0pt;font-family:"Calibri", sans-serif;min-width:fit-content;">no</span><span style="background-color:rgba(0,0,0,0);color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:normal;font-size:10.0pt;font-family:"Calibri", sans-serif;min-width:fit-content;"> significant warranty claims for the year ended December 31, 2020. Warranty claims are included in cost of products sold on the Consolidated Statements of Operations.</span></p>
CY2022	tmst	Warranty Claims WarrantyClaims	700000
CY2021	tmst	Warranty Claims WarrantyClaims	1400000
CY2020	tmst	Warranty Claims WarrantyClaims	0
CY2022	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	200000
CY2021	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-100000
CY2020	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-200000
CY2022	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1329900000
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1282900000
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	830700000
CY2022	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1329900000
CY2022	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	800000
CY2021	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	1700000
CY2020	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	1800000
CY2021Q4	tmst	Proceeds From Issuance Of Internal Revenue Service ProceedsFromIssuanceOfInternalRevenueService	500000
CY2022Q1	tmst	Cash Proceeds From Issuance Of Remaining Internal Revenue Service CashProceedsFromIssuanceOfRemainingInternalRevenueService	1800000
CY2022	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1329900000
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1282900000
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	830700000
CY2022Q4	us-gaap	Noncurrent Assets NoncurrentAssets	503600000
CY2021Q4	us-gaap	Noncurrent Assets NoncurrentAssets	531400000
CY2021Q4	us-gaap	Restructuring Reserve RestructuringReserve	4700000
CY2022	us-gaap	Restructuring Charges RestructuringCharges	800000
CY2022	us-gaap	Payments For Restructuring PaymentsForRestructuring	5000000.0
CY2022Q4	us-gaap	Restructuring Reserve RestructuringReserve	500000
CY2020Q4	us-gaap	Restructuring Reserve RestructuringReserve	1500000
CY2021	us-gaap	Restructuring Charges RestructuringCharges	6700000
CY2021	us-gaap	Payments For Restructuring PaymentsForRestructuring	3500000
CY2021Q4	us-gaap	Restructuring Reserve RestructuringReserve	4700000
CY2022Q4	tmst	Early Termination Reimbursement From Customer EarlyTerminationReimbursementFromCustomer	4300000
CY2022	tmst	Pension Costand Other Postretirement Benefits Cost Reversalof Cost Excluding Service Component PensionCostandOtherPostretirementBenefitsCostReversalofCostExcludingServiceComponent	-20300000
CY2021	tmst	Pension Costand Other Postretirement Benefits Cost Reversalof Cost Excluding Service Component PensionCostandOtherPostretirementBenefitsCostReversalofCostExcludingServiceComponent	-37200000
CY2020	tmst	Pension Costand Other Postretirement Benefits Cost Reversalof Cost Excluding Service Component PensionCostandOtherPostretirementBenefitsCostReversalofCostExcludingServiceComponent	-26600000
CY2022	tmst	Pension Costand Other Postretirement Benefits Cost Reversalof Cost Remeasurement PensionCostandOtherPostretirementBenefitsCostReversalofCostRemeasurement	-35400000
CY2021	tmst	Pension Costand Other Postretirement Benefits Cost Reversalof Cost Remeasurement PensionCostandOtherPostretirementBenefitsCostReversalofCostRemeasurement	-20100000
CY2020	tmst	Pension Costand Other Postretirement Benefits Cost Reversalof Cost Remeasurement PensionCostandOtherPostretirementBenefitsCostReversalofCostRemeasurement	14700000
CY2022	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	200000
CY2021	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-100000
CY2020	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-200000
CY2022	us-gaap	Gain Loss On Sale Of Insurance Block GainLossOnSaleOfInsuranceBlock	-34500000
CY2021	us-gaap	Gain Loss On Sale Of Insurance Block GainLossOnSaleOfInsuranceBlock	0
CY2020	us-gaap	Gain Loss On Sale Of Insurance Block GainLossOnSaleOfInsuranceBlock	0
CY2022	tmst	Sales And Use Tax Refund SalesAndUseTaxRefund	0
CY2021	tmst	Sales And Use Tax Refund SalesAndUseTaxRefund	-2500000
CY2020	tmst	Sales And Use Tax Refund SalesAndUseTaxRefund	0
CY2022	tmst	Employee Retention Credit EmployeeRetentionCredit	0
CY2021	tmst	Employee Retention Credit EmployeeRetentionCredit	0
CY2020	tmst	Employee Retention Credit EmployeeRetentionCredit	-2300000
CY2022	tmst	Miscellaneous Nonoperating Income Expense MiscellaneousNonoperatingIncomeExpense	200000
CY2021	tmst	Miscellaneous Nonoperating Income Expense MiscellaneousNonoperatingIncomeExpense	-200000
CY2020	tmst	Miscellaneous Nonoperating Income Expense MiscellaneousNonoperatingIncomeExpense	200000
CY2022	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	90600000
CY2021	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	59500000
CY2020	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	14200000
CY2022	tmst	Pension Costand Other Postretirement Benefits Cost Reversalof Cost Remeasurement PensionCostandOtherPostretirementBenefitsCostReversalofCostRemeasurement	-35400000
CY2022	tmst	Investment Gains On Plan Assets InvestmentGainsOnPlanAssets	359900000
CY2022	tmst	Investment Losses On Plan Assets InvestmentLossesOnPlanAssets	-327200000
CY2022	tmst	Non Cash Settlement Related To Bargaining Plan NonCashSettlementRelatedToBargainingPlan	2700000
CY2022	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	8400000
CY2021	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	4100000
CY2020	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	2300000
CY2022	tmst	Effective Income Tax Rate Reconciliation Permanent Differences Amount EffectiveIncomeTaxRateReconciliationPermanentDifferencesAmount	8900000
CY2021	tmst	Pension Costand Other Postretirement Benefits Cost Reversalof Cost Remeasurement PensionCostandOtherPostretirementBenefitsCostReversalofCostRemeasurement	-20100000
CY2021	tmst	Investment Gains On Plan Assets InvestmentGainsOnPlanAssets	55700000
CY2021	tmst	Investment Losses On Plan Assets InvestmentLossesOnPlanAssets	-35600000
CY2022Q4	us-gaap	Gain Loss On Sale Of Insurance Block GainLossOnSaleOfInsuranceBlock	-33000000.0
CY2022Q4	tmst	Gain Loss On Total Recovery GainLossOnTotalRecovery	13000000.0
CY2023Q1	tmst	Gain Loss On Total Recovery GainLossOnTotalRecovery	20000000.0
CY2022Q3	us-gaap	Gain Loss On Sale Of Insurance Block GainLossOnSaleOfInsuranceBlock	-1500000
CY2021	tmst	Sales And Use Tax Refund SalesAndUseTaxRefund	-2500000
CY2020	tmst	Employee Retention Credit EmployeeRetentionCredit	-2300000
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	108500000
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	171200000
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-64100000
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	-11400000
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	5500000
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	3400000
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	97100000
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	176700000
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-60700000
CY2022	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	600000
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	200000
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	600000
CY2022	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	5700000
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	3700000
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	0
CY2022	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	800000
CY2021	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	600000
CY2020	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	500000
CY2022	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	7100000
CY2021	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	4500000
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	1100000
CY2022	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	24200000
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	800000
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-400000
CY2022	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	700000
CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	300000
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	500000
CY2022	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	0
CY2021	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	100000
CY2021	tmst	Effective Income Tax Rate Reconciliation Permanent Differences Amount EffectiveIncomeTaxRateReconciliationPermanentDifferencesAmount	-200000
CY2020	tmst	Effective Income Tax Rate Reconciliation Permanent Differences Amount EffectiveIncomeTaxRateReconciliationPermanentDifferencesAmount	1300000
CY2020	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	0
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	24900000
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	1200000
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	100000
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	32000000.0
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5700000
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1200000
CY2022Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	2200000
CY2022	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	20400000
CY2021	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	37100000
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-12700000
CY2022Q4	tmst	Deferred Tax Assets Accrued Restructuring DeferredTaxAssetsAccruedRestructuring	100000
CY2021Q4	tmst	Deferred Tax Assets Accrued Restructuring DeferredTaxAssetsAccruedRestructuring	1100000
CY2022Q4	us-gaap	Deferred Tax Assets Goodwill And Intangible Assets DeferredTaxAssetsGoodwillAndIntangibleAssets	200000
CY2022	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	3600000
CY2021	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-500000
CY2020	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	100000
CY2022	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-2500000
CY2021	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-34800000
CY2020	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	10300000
CY2022	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	600000
CY2021	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	0
CY2020	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	0
CY2022	tmst	Effective Income Tax Rate Reconciliation Global Intangible Low Tax Income Amount EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxIncomeAmount	0
CY2021	tmst	Effective Income Tax Rate Reconciliation Global Intangible Low Tax Income Amount EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxIncomeAmount	0
CY2020	tmst	Effective Income Tax Rate Reconciliation Global Intangible Low Tax Income Amount EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxIncomeAmount	0
CY2022	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	1000000.0
CY2021	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-0
CY2020	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-100000
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	32000000.0
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5700000
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1200000
CY2022	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.329
CY2021	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.032
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.020
CY2021Q2	us-gaap	Dividends Dividends	800000
CY2021Q3	us-gaap	Dividends Dividends	400000
CY2020Q3	tmst	Dividends Declared DividendsDeclared	5100000
CY2021Q4	us-gaap	Deferred Tax Liabilities Undistributed Foreign Earnings DeferredTaxLiabilitiesUndistributedForeignEarnings	0
CY2022Q4	us-gaap	Deferred Tax Liabilities Undistributed Foreign Earnings DeferredTaxLiabilitiesUndistributedForeignEarnings	0
CY2020Q4	us-gaap	Deferred Tax Liabilities Undistributed Foreign Earnings DeferredTaxLiabilitiesUndistributedForeignEarnings	300000
CY2022Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	81400000
CY2021Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	89000000.0
CY2022Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Capitalized Inventory Costs DeferredTaxLiabilitiesDeferredExpenseCapitalizedInventoryCosts	0
CY2021Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Capitalized Inventory Costs DeferredTaxLiabilitiesDeferredExpenseCapitalizedInventoryCosts	8000000.0
CY2022Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	3100000
CY2021Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	3500000
CY2022Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	84500000
CY2021Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	100500000
CY2022Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Domestic DeferredTaxAssetsOperatingLossCarryforwardsDomestic	20500000
CY2021Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Domestic DeferredTaxAssetsOperatingLossCarryforwardsDomestic	52600000
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	35500000
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	44300000
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	6600000
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	8200000
CY2022Q4	tmst	Deferred Tax Assets Leasing Arrangements DeferredTaxAssetsLeasingArrangements	3100000
CY2021Q4	tmst	Deferred Tax Assets Leasing Arrangements DeferredTaxAssetsLeasingArrangements	3500000
CY2022Q4	us-gaap	Deferred Tax Assets State Taxes DeferredTaxAssetsStateTaxes	800000
CY2021Q4	us-gaap	Deferred Tax Assets State Taxes DeferredTaxAssetsStateTaxes	1300000
CY2021Q4	us-gaap	Deferred Tax Assets Goodwill And Intangible Assets DeferredTaxAssetsGoodwillAndIntangibleAssets	600000
CY2022Q4	us-gaap	Deferred Tax Assets Inventory DeferredTaxAssetsInventory	700000
CY2021Q4	us-gaap	Deferred Tax Assets Inventory DeferredTaxAssetsInventory	600000
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Allowance For Doubtful Accounts DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts	300000
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Allowance For Doubtful Accounts DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts	500000
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Legal Settlements DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLegalSettlements	2000000.0
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Legal Settlements DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLegalSettlements	0
CY2022Q4	tmst	Deferred Tax Assets Capital Loss Carryforward DeferredTaxAssetsCapitalLossCarryforward	800000
CY2021Q4	tmst	Deferred Tax Assets Capital Loss Carryforward DeferredTaxAssetsCapitalLossCarryforward	800000
CY2022Q4	us-gaap	Deferred Tax Assets In Process Research And Development DeferredTaxAssetsInProcessResearchAndDevelopment	900000
CY2021Q4	us-gaap	Deferred Tax Assets In Process Research And Development DeferredTaxAssetsInProcessResearchAndDevelopment	0
CY2022Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	100000
CY2021Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	300000
CY2022Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	71600000
CY2021Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	113800000
CY2022Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	13000000.0
CY2021Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	15500000
CY2022Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	58600000
CY2021Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	98300000
CY2022Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	25900000
CY2021Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	2200000
CY2022Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	25900000
CY2021Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	2200000
CY2022Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	71700000
CY2022Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0
CY2021Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0
CY2022Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	0
CY2021Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	0
CY2020Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	0
CY2022Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	0
CY2021Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	0
CY2020Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	0
CY2022	tmst	Incremental Common Shares Attributable To Share Based Payment Arrangements Shares Assumed Purchased IncrementalCommonSharesAttributableToShareBasedPaymentArrangementsSharesAssumedPurchased	3200000
CY2022	tmst	Incremental Common Shares Attributable To Share Based Payment Arrangements Shares Assumed Purchased With Potential Proceeds IncrementalCommonSharesAttributableToShareBasedPaymentArrangementsSharesAssumedPurchasedWithPotentialProceeds	1100000
CY2021	tmst	Incremental Common Shares Attributable To Share Based Payment Arrangements Shares Assumed Purchased IncrementalCommonSharesAttributableToShareBasedPaymentArrangementsSharesAssumedPurchased	3000000.0
CY2021	tmst	Incremental Common Shares Attributable To Share Based Payment Arrangements Shares Assumed Purchased With Potential Proceeds IncrementalCommonSharesAttributableToShareBasedPaymentArrangementsSharesAssumedPurchasedWithPotentialProceeds	1300000
CY2022	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	65100000
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	171000000.0
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-61900000
CY2022	us-gaap	Interest On Convertible Debt Net Of Tax InterestOnConvertibleDebtNetOfTax	1900000
CY2021	us-gaap	Interest On Convertible Debt Net Of Tax InterestOnConvertibleDebtNetOfTax	4100000
CY2020	us-gaap	Interest On Convertible Debt Net Of Tax InterestOnConvertibleDebtNetOfTax	0
CY2022	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	67000000.0
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	175100000
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-61900000
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	45800000
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	45900000
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	45000000.0
CY2022	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	2100000
CY2021	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	1700000
CY2020	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0
CY2022	us-gaap	Incremental Common Shares Attributable To Conversion Of Debt Securities IncrementalCommonSharesAttributableToConversionOfDebtSecurities	3600000
CY2021	us-gaap	Incremental Common Shares Attributable To Conversion Of Debt Securities IncrementalCommonSharesAttributableToConversionOfDebtSecurities	7400000
CY2020	us-gaap	Incremental Common Shares Attributable To Conversion Of Debt Securities IncrementalCommonSharesAttributableToConversionOfDebtSecurities	0
CY2022Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	1848100000
CY2021Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	1827700000
CY2022Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	1362000000.0
CY2021Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	1317500000
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	51500000
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	55000000.0
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	45000000.0
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.42
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.73
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-1.38
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.30
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.18
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.38
CY2022Q4	us-gaap	Other Inventory Supplies OtherInventorySupplies	36900000
CY2021Q4	us-gaap	Other Inventory Supplies OtherInventorySupplies	29300000
CY2022Q4	us-gaap	Inventory Raw Materials InventoryRawMaterials	23900000
CY2021Q4	us-gaap	Inventory Raw Materials InventoryRawMaterials	37300000
CY2022Q4	us-gaap	Inventory Work In Process InventoryWorkInProcess	94700000
CY2021Q4	us-gaap	Inventory Work In Process InventoryWorkInProcess	89300000
CY2022Q4	us-gaap	Inventory Finished Goods InventoryFinishedGoods	37400000
CY2021Q4	us-gaap	Inventory Finished Goods InventoryFinishedGoods	55800000
CY2022Q4	us-gaap	Inventory Gross InventoryGross	192900000
CY2021Q4	us-gaap	Inventory Gross InventoryGross	211700000
CY2022Q4	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	500000
CY2021Q4	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	800000
CY2022Q4	us-gaap	Inventory Net InventoryNet	192400000
CY2021Q4	us-gaap	Inventory Net InventoryNet	210900000
CY2022Q4	us-gaap	Land Land	11200000
CY2021Q4	us-gaap	Land Land	11200000
CY2022Q4	us-gaap	Buildings And Improvements Gross BuildingsAndImprovementsGross	414600000
CY2021Q4	us-gaap	Buildings And Improvements Gross BuildingsAndImprovementsGross	415000000.0
CY2022Q4	us-gaap	Machinery And Equipment Gross MachineryAndEquipmentGross	1391500000
CY2021Q4	us-gaap	Machinery And Equipment Gross MachineryAndEquipmentGross	1391900000
CY2022Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	30800000
CY2021Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	9600000
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	486100000
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	510200000
CY2022	us-gaap	Depreciation Depreciation	55500000
CY2021	us-gaap	Depreciation Depreciation	59800000
CY2020	us-gaap	Depreciation Depreciation	65000000.0
CY2022Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P2Y6M
CY2021	tmst	Disposal Group Accelerated Depreciation Expense DisposalGroupAcceleratedDepreciationExpense	1500000
CY2020	tmst	Disposal Group Accelerated Depreciation Expense DisposalGroupAcceleratedDepreciationExpense	2400000
CY2022	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	1900000
CY2021	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	1300000
CY2021	us-gaap	Impairment Of Long Lived Assets To Be Disposed Of ImpairmentOfLongLivedAssetsToBeDisposedOf	10600000
CY2020	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	2600000
CY2022	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	10600000
CY2021	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	3600000
CY2019	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	2000000.0
CY2022Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	73200000
CY2022Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	68200000
CY2022Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	5000000.0
CY2021Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	72700000
CY2021Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	66000000.0
CY2021Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	6700000
CY2022	tmst	Finite Lived Intangible Asset Weighted Average Remaining Useful Life FiniteLivedIntangibleAssetWeightedAverageRemainingUsefulLife	P8Y
CY2022	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	2800000
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	3300000
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	5000000.0
CY2020	us-gaap	Gain Loss On Disposition Of Intangible Assets GainLossOnDispositionOfIntangibleAssets	200000
CY2022	us-gaap	Gain Loss On Disposition Of Intangible Assets GainLossOnDispositionOfIntangibleAssets	0
CY2021	us-gaap	Gain Loss On Disposition Of Intangible Assets GainLossOnDispositionOfIntangibleAssets	0
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	2300000
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	1300000
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	300000
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	100000
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	100000
CY2022	us-gaap	Lessee Operating Lease Existence Of Option To Extend LesseeOperatingLeaseExistenceOfOptionToExtend	true
CY2022Q4	us-gaap	Long Term Debt LongTermDebt	20400000
CY2021Q4	us-gaap	Long Term Debt LongTermDebt	44900000
CY2022	us-gaap	Operating Lease Cost OperatingLeaseCost	6700000
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	8200000
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	8800000
CY2022	us-gaap	Short Term Lease Cost ShortTermLeaseCost	900000
CY2021	us-gaap	Short Term Lease Cost ShortTermLeaseCost	700000
CY2020	us-gaap	Short Term Lease Cost ShortTermLeaseCost	700000
CY2022	us-gaap	Lease Cost LeaseCost	7600000
CY2021	us-gaap	Lease Cost LeaseCost	8900000
CY2020	us-gaap	Lease Cost LeaseCost	9500000
CY2022Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.031
CY2021Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.027
CY2022	us-gaap	Operating Lease Payments OperatingLeasePayments	6700000
CY2021	us-gaap	Operating Lease Payments OperatingLeasePayments	8200000
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	8800000
CY2022	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	4500000
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	3100000
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	12500000
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	6300000
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	4000000.0
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	1900000
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	500000
CY2022Q4	tmst	Lessee Operating Lease Liability Payments Due After Year Four LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour	300000
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	13000000.0
CY2022Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	500000
CY2022Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	12500000
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CY2021Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	44900000
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CY2021Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	0
CY2022	us-gaap	Interest Expense InterestExpense	3900000
CY2021	us-gaap	Interest Expense InterestExpense	6200000
CY2020	us-gaap	Interest Expense InterestExpense	12600000
CY2022	us-gaap	Investment Income Interest InvestmentIncomeInterest	3300000
CY2021	us-gaap	Investment Income Interest InvestmentIncomeInterest	300000
CY2020	us-gaap	Investment Income Interest InvestmentIncomeInterest	400000
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CY2021	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-5900000
CY2020	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-12200000
CY2022Q4	us-gaap	Money Market Funds At Carrying Value MoneyMarketFundsAtCarryingValue	209500000
CY2021Q4	us-gaap	Money Market Funds At Carrying Value MoneyMarketFundsAtCarryingValue	0
CY2020Q4	us-gaap	Money Market Funds At Carrying Value MoneyMarketFundsAtCarryingValue	0
CY2022	us-gaap	Interest Paid InterestPaid	3100000
CY2021	us-gaap	Interest Paid InterestPaid	5100000
CY2020	us-gaap	Interest Paid InterestPaid	7600000
CY2021Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	50000000.0
CY2022Q4	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	75000000.0
CY2022	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	3300000
CY2021	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	2800000
CY2020	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	3200000
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	2054088
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	20.41
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0
CY2022	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	0
CY2022	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	518770
CY2022	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	15.36
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CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	30.86
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	1119523
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	18.85
CY2022	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P3Y10M24D
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	5800000
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber	167610
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice	6.44
CY2022	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1	P7Y
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Aggregate Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue	2000000.0
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	951913
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	21.04
CY2022	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P3Y3M18D
CY2022Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	3800000
CY2022	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	8800000
CY2021	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	7300000
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	6600000
CY2022	tmst	Future Allocated Share Based Compensation Expense FutureAllocatedShareBasedCompensationExpense	11400000
CY2022	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P1Y8M12D
CY2022	us-gaap	Oci Before Reclassifications Before Tax Attributable To Parent OciBeforeReclassificationsBeforeTaxAttributableToParent	1700000
CY2022	us-gaap	Reclassification From Aoci Current Period Before Tax Attributable To Parent ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent	4700000
CY2022	tmst	Other Comprehensive Income Loss Deferrals Before Tax OtherComprehensiveIncomeLossDeferralsBeforeTax	0
CY2022	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	400000
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-6000000.0
CY2021	us-gaap	Oci Before Reclassifications Before Tax Attributable To Parent OciBeforeReclassificationsBeforeTaxAttributableToParent	300000
CY2021	us-gaap	Reclassification From Aoci Current Period Before Tax Attributable To Parent ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent	5800000
CY2021	tmst	Other Comprehensive Income Loss Deferrals Before Tax OtherComprehensiveIncomeLossDeferralsBeforeTax	-14200000
CY2021	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	0
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-19700000
CY2022Q4	us-gaap	Loss Contingency Accrual At Carrying Value LossContingencyAccrualAtCarryingValue	1100000
CY2021Q4	us-gaap	Loss Contingency Accrual At Carrying Value LossContingencyAccrualAtCarryingValue	300000
CY2022	dei	Auditor Name AuditorName	Ernst & Young LLP
CY2022	dei	Auditor Firm AuditorFirmId	42

Files In Submission

Name	View Source	Status
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0000950170-23-004348-index.html	Edgar Link	pending
0000950170-23-004348.txt	Edgar Link	pending
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$MTUS
Metallus Inc. Stock $mtus

2023 Q1 Form 10-K Financial Statement

#000095017023004348 Filed on February 24, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$MTUS Metallus Inc. Stock $mtus

2023 Q1 Form 10-K Financial Statement

#000095017023004348 Filed on February 24, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$MTUS
Metallus Inc. Stock $mtus