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Income Taxes (Details 4) (USD $)
In Millions, unless otherwise specified
12 Months Ended 3 Months Ended 9 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2014
Sep. 30, 2014
Dec. 31, 2011
Income Tax Disclosure [Abstract]            
Deferred Tax Liability Not Recognized, Determination of Deferred Tax Liability is Not Practicable, Undistributed Earnings of Foreign Subsidiaries 652.8          
Operating loss carryforwards            
Deferred Tax Assets, Capital Loss Carryforwards $ 8.6us-gaap_IncomeTaxExpenseBenefit $ 36.1us-gaap_IncomeTaxExpenseBenefit $ 38.0us-gaap_IncomeTaxExpenseBenefit      
Capital loss generation (45.70%)us-gaap_EffectiveIncomeTaxRateReconciliationDeductionsOther 0.00%us-gaap_EffectiveIncomeTaxRateReconciliationDeductionsOther 0.00%us-gaap_EffectiveIncomeTaxRateReconciliationDeductionsOther      
Effective Income Tax Rate, Discontinued Operations 6.90%mtw_EffectiveIncomeTaxRateDiscontinuedOperations          
Cash and cash equivalents 68.0us-gaap_CashAndCashEquivalentsAtCarryingValue 54.9us-gaap_CashAndCashEquivalentsAtCarryingValue 73.2us-gaap_CashAndCashEquivalentsAtCarryingValue 68.0us-gaap_CashAndCashEquivalentsAtCarryingValue   68.3us-gaap_CashAndCashEquivalentsAtCarryingValue
Undistributed Earnings of Foreign Subsidiaries 5.4us-gaap_IncomeTaxExpenseBenefitContinuingOperationsAdjustmentOfDeferredTaxAssetLiability          
UNITED KINGDOM            
Operating loss carryforwards            
Deferred Tax Assets, Capital Loss Carryforwards 25.6us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_IncomeTaxAuthorityAxis
= country_GB
         
Capital loss generation 15.10%us-gaap_EffectiveIncomeTaxRateReconciliationDeductionsOther
/ us-gaap_IncomeTaxAuthorityAxis
= country_GB
         
State Administration of Taxation, China [Member]            
Operating loss carryforwards            
Utilization of Reserve 9.0us-gaap_ValuationAllowancesAndReservesDeductions
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_StateAdministrationOfTaxationChinaMember
         
Tax Authority, Spain [Member]            
Operating loss carryforwards            
Utilization of Reserve       0.6us-gaap_ValuationAllowancesAndReservesDeductions
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_TaxAuthoritySpainMember
3.6us-gaap_ValuationAllowancesAndReservesDeductions
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_TaxAuthoritySpainMember
 
State            
Operating loss carryforwards            
Net operating loss carryforwards 520.9us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_StateAndLocalJurisdictionMember
    520.9us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_StateAndLocalJurisdictionMember
   
State of Wisconsin            
Operating loss carryforwards            
Deferred tax asset for net operating loss carryforwards generated in the state of Wisconsin 19.2us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal
/ us-gaap_IncomeTaxAuthorityAxis
= stpr_WI
    19.2us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal
/ us-gaap_IncomeTaxAuthorityAxis
= stpr_WI
   
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount 1.1us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount
/ us-gaap_IncomeTaxAuthorityAxis
= stpr_WI
         
Foreign            
Operating loss carryforwards            
Cash and cash equivalents 37.2us-gaap_CashAndCashEquivalentsAtCarryingValue
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_ForeignCountryMember
    37.2us-gaap_CashAndCashEquivalentsAtCarryingValue
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_ForeignCountryMember
   
Net operating loss carryforwards 551.5us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_ForeignCountryMember
    551.5us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_ForeignCountryMember
   
Operating Loss Carryforwards, Valuation Allowance 495.7us-gaap_OperatingLossCarryforwardsValuationAllowance
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_ForeignCountryMember
    495.7us-gaap_OperatingLossCarryforwardsValuationAllowance
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_ForeignCountryMember
   
UNITED STATES            
Operating loss carryforwards            
Net operating loss carryforwards $ 139.1us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= country_US
    $ 139.1us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= country_US
   
Operating Loss Carryforwards, Expiration Date Jan. 01, 2019