XML 54 R42.htm IDEA: XBRL DOCUMENT v3.25.1

Other (Income) Expense, net - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Statutory Accounting Practices [Line Items]
Loss (gain) from remeasurement of benefit plans	$ 0.0	$ 0.8
Loss on investment losses on plan assets and lump sum basis losses		1.5
Decrease in liability of investment losses on plan assets and lump sum basis losses		$ 0.7

X

- Definition

Investment gains on plan assets and lump sum basis losses.

+ References

No definition available.

+ Details

Name:	mtus_InvestmentGainsOnPlanAssetsAndLumpSumBasedLosses
Namespace Prefix:	mtus_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Investment losses on plan assets and lump sum based losses.

+ References

No definition available.

+ Details

Name:	mtus_InvestmentLossesOnPlanAssetsAndLumpSumBasedLosses
Namespace Prefix:	mtus_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Pension Cost and Other Postretirement Benefits Cost (Reversal of Cost), Remeasurement

+ References

No definition available.

+ Details

Name:	mtus_PensionCostandOtherPostretirementBenefitsCostReversalofCostRemeasurement
Namespace Prefix:	mtus_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(23)(c))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1

+ Details

Name:	us-gaap_StatutoryAccountingPracticesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration