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Note 3 - Inventories (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended 3 Months Ended 2 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2014
Dec. 31, 2014
Finish Goods [Member] | Successor [Member] | Fair Value Adjustment to Inventory [Member] | MacDermid [Member]        
Note 3 - Inventories (Details) [Line Items]        
Assets, Fair Value Adjustment $ 12.0us-gaap_AssetsFairValueAdjustment
/ us-gaap_BusinessAcquisitionAxis
= pah_MacDermidMember
/ us-gaap_NonrecurringAdjustmentAxis
= us-gaap_FairValueAdjustmentToInventoryMember
/ us-gaap_PublicUtilitiesInventoryAxis
= pah_FinishGoodsMember
/ us-gaap_StatementScenarioAxis
= us-gaap_SuccessorMember		 $ 23.9us-gaap_AssetsFairValueAdjustment
/ us-gaap_BusinessAcquisitionAxis
= pah_MacDermidMember
/ us-gaap_NonrecurringAdjustmentAxis
= us-gaap_FairValueAdjustmentToInventoryMember
/ us-gaap_PublicUtilitiesInventoryAxis
= pah_FinishGoodsMember
/ us-gaap_StatementScenarioAxis
= us-gaap_SuccessorMember		    
Finish Goods [Member] | Successor [Member] | MacDermid [Member]        
Note 3 - Inventories (Details) [Line Items]        
Assets, Fair Value Adjustment   35.9us-gaap_AssetsFairValueAdjustment
/ us-gaap_BusinessAcquisitionAxis
= pah_MacDermidMember
/ us-gaap_PublicUtilitiesInventoryAxis
= pah_FinishGoodsMember
/ us-gaap_StatementScenarioAxis
= us-gaap_SuccessorMember		    
Finish Goods [Member] | Fair Value Adjustment to Inventory [Member] | Agriphar [Member]        
Note 3 - Inventories (Details) [Line Items]        
Assets, Fair Value Adjustment     9.4us-gaap_AssetsFairValueAdjustment
/ us-gaap_BusinessAcquisitionAxis
= pah_AgripharMember
/ us-gaap_NonrecurringAdjustmentAxis
= us-gaap_FairValueAdjustmentToInventoryMember
/ us-gaap_PublicUtilitiesInventoryAxis
= pah_FinishGoodsMember		  
Finish Goods [Member] | Fair Value Adjustment to Inventory [Member] | CAS [Member]        
Note 3 - Inventories (Details) [Line Items]        
Assets, Fair Value Adjustment       36.1us-gaap_AssetsFairValueAdjustment
/ us-gaap_BusinessAcquisitionAxis
= pah_CASMember
/ us-gaap_NonrecurringAdjustmentAxis
= us-gaap_FairValueAdjustmentToInventoryMember
/ us-gaap_PublicUtilitiesInventoryAxis
= pah_FinishGoodsMember
Finish Goods [Member] | Fair Value Adjustment to Inventory [Member] | Agriphar And CAS [Member]        
Note 3 - Inventories (Details) [Line Items]        
Assets, Fair Value Adjustment 22.0us-gaap_AssetsFairValueAdjustment
/ us-gaap_BusinessAcquisitionAxis
= pah_AgripharAndCASMember
/ us-gaap_NonrecurringAdjustmentAxis
= us-gaap_FairValueAdjustmentToInventoryMember
/ us-gaap_PublicUtilitiesInventoryAxis
= pah_FinishGoodsMember		      
Fair Value Adjustment to Inventory [Member] | Agriphar And CAS [Member]        
Note 3 - Inventories (Details) [Line Items]        
Assets, Fair Value Adjustment $ 23.5us-gaap_AssetsFairValueAdjustment
/ us-gaap_BusinessAcquisitionAxis
= pah_AgripharAndCASMember
/ us-gaap_NonrecurringAdjustmentAxis
= us-gaap_FairValueAdjustmentToInventoryMember