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Acquisitions (Schedule of Acquisitions) (Details) (USD $)
In Millions, unless otherwise specified
0 Months Ended
Dec. 04, 2014
Oct. 10, 2014
Jun. 10, 2014
Saet S.p.A [Member] | Engineered Products [Member]      
Business Acquisition [Line Items]      
Purchase Consideration, gross $ 22.1us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= pkoh_SaetS.p.AMember
/ us-gaap_StatementBusinessSegmentsAxis
= pkoh_EngineeredProductsMember
   
Percentage of equity acquired 100.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
/ us-gaap_BusinessAcquisitionAxis
= pkoh_SaetS.p.AMember
/ us-gaap_StatementBusinessSegmentsAxis
= pkoh_EngineeredProductsMember
   
Autoform Tool & Manufacturing [Member] | Assembly Components [Member]      
Business Acquisition [Line Items]      
Purchase Consideration, gross   48.9us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= pkoh_AutoformToolandManufacturingMember
/ us-gaap_StatementBusinessSegmentsAxis
= pkoh_AssemblyComponentsMember
 
Percentage of equity acquired   100.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
/ us-gaap_BusinessAcquisitionAxis
= pkoh_AutoformToolandManufacturingMember
/ us-gaap_StatementBusinessSegmentsAxis
= pkoh_AssemblyComponentsMember
 
Apollo Group Limited [Member]      
Business Acquisition [Line Items]      
Payments to Acquire Businesses, Net of Cash Acquired     6.5us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
/ us-gaap_BusinessAcquisitionAxis
= pkoh_ApolloAerospaceGroupMember
Apollo Group Limited [Member] | Supply Technologies [Member]      
Business Acquisition [Line Items]      
Payments to Acquire Businesses, Net of Cash Acquired     $ 6.5us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
/ us-gaap_BusinessAcquisitionAxis
= pkoh_ApolloAerospaceGroupMember
/ us-gaap_StatementBusinessSegmentsAxis
= pkoh_SupplyTechnologiesMember
Percentage of equity acquired     100.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
/ us-gaap_BusinessAcquisitionAxis
= pkoh_ApolloAerospaceGroupMember
/ us-gaap_StatementBusinessSegmentsAxis
= pkoh_SupplyTechnologiesMember