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Related Party Transactions Level 4 (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Related Party Transaction [Line Items]      
cash collateralizing loan $ 11msc_Cashcollateralizingloan   $ 11msc_Cashcollateralizingloan
Apollo [Member]      
Related Party Transaction [Line Items]      
Annual management consulting fee 3msc_AnnualManagementConsultingFee
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PrincipalOwnerMember
   
Annual management consulting fee percentage 2.00%msc_AnnualManagementConsultingFeePercentage
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PrincipalOwnerMember
   
Related Party Costs 1us-gaap_RelatedPartyCosts
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PrincipalOwnerMember
1us-gaap_RelatedPartyCosts
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_PrincipalOwnerMember
 
Momentive Performance Materials Inc. [Member]      
Related Party Transaction [Line Items]      
Shared Services Costs Incurred by MPM 25msc_SharedServicesCostsIncurredByMpm
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_SubsidiaryOfCommonParentMember
25msc_SharedServicesCostsIncurredByMpm
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_SubsidiaryOfCommonParentMember
 
Due from Related Parties 6us-gaap_DueFromRelatedParties
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_SubsidiaryOfCommonParentMember
   
Apollo Affiliates and Other Related Parties [Member]      
Related Party Transaction [Line Items]      
Revenue from Related Parties 35us-gaap_RevenueFromRelatedParties
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= msc_ApolloAffiliatesAndOtherRelatedPartiesMember
46us-gaap_RevenueFromRelatedParties
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= msc_ApolloAffiliatesAndOtherRelatedPartiesMember
 
Due from Related Parties 10us-gaap_DueFromRelatedParties
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= msc_ApolloAffiliatesAndOtherRelatedPartiesMember
  26us-gaap_DueFromRelatedParties
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= msc_ApolloAffiliatesAndOtherRelatedPartiesMember
Purchases From Related Parties 13msc_PurchasesFromRelatedParties
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= msc_ApolloAffiliatesAndOtherRelatedPartiesMember
1msc_PurchasesFromRelatedParties
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= msc_ApolloAffiliatesAndOtherRelatedPartiesMember
 
Momentive Performance Materials Inc. [Member]      
Related Party Transaction [Line Items]      
Due to Related Parties     1us-gaap_DueToRelatedPartiesCurrentAndNoncurrent
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= msc_MomentivePerformanceMaterialsIncMember
Revenue from Related Parties   1us-gaap_RevenueFromRelatedParties
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= msc_MomentivePerformanceMaterialsIncMember
 
Purchases From Related Parties 2msc_PurchasesFromRelatedParties
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= msc_MomentivePerformanceMaterialsIncMember
2msc_PurchasesFromRelatedParties
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= msc_MomentivePerformanceMaterialsIncMember
 
Purchases Related to Distribution Agreement 7msc_PurchasesRelatedtoDistributionAgreement
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= msc_MomentivePerformanceMaterialsIncMember
   
AP related to distribution agreement 3msc_APrelatedtodistributionagreement
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= msc_MomentivePerformanceMaterialsIncMember
   
HAI [Member]      
Related Party Transaction [Line Items]      
Due to Related Parties     2us-gaap_DueToRelatedPartiesCurrentAndNoncurrent
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_EquityMethodInvesteeMember
Revenue from Related Parties 21us-gaap_RevenueFromRelatedParties
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_EquityMethodInvesteeMember
27us-gaap_RevenueFromRelatedParties
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_EquityMethodInvesteeMember
 
Equity Method Investment, Ownership Percentage 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_EquityMethodInvesteeMember
   
Due from Related Parties     8us-gaap_DueFromRelatedParties
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_EquityMethodInvesteeMember
Purchases From Related Parties 5msc_PurchasesFromRelatedParties
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_EquityMethodInvesteeMember
7msc_PurchasesFromRelatedParties
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_EquityMethodInvesteeMember
 
Cash Dividends Declared to Parent Company by Unconsolidated Subsidiaries 4msc_CashDividendsDeclaredToParentCompanyByUnconsolidatedSubsidiaries
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_EquityMethodInvesteeMember
   
Future price concessions 16msc_FuturePriceConcessions
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_EquityMethodInvesteeMember
   
settlement discounts issued to related party 1msc_Settlementdiscountsissuedtorelatedparty
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_EquityMethodInvesteeMember
   
Russian Joint Venture [Member]      
Related Party Transaction [Line Items]      
Accounts Receivable, Related Parties, Current 6us-gaap_AccountsReceivableRelatedPartiesCurrent
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_CoVenturerMember
  6us-gaap_AccountsReceivableRelatedPartiesCurrent
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_CoVenturerMember
Momentive Specialty Chemicals Inc. [Member]      
Related Party Transaction [Line Items]      
Shared Services Costs Incurred by MSC 31msc_SharedServicesCostsIncurredByMsc
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
33msc_SharedServicesCostsIncurredByMsc
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
 
Shared Services Billings - MSC to MPM 17msc_SharedServicesBillingsMscToMpm
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
9msc_SharedServicesBillingsMscToMpm
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
 
Maximum [Member] | Momentive Performance Materials Inc. [Member]      
Related Party Transaction [Line Items]      
Due to Related Parties 1us-gaap_DueToRelatedPartiesCurrentAndNoncurrent
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_SubsidiaryOfCommonParentMember
  1us-gaap_DueToRelatedPartiesCurrentAndNoncurrent
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_SubsidiaryOfCommonParentMember
Due from Related Parties     9us-gaap_DueFromRelatedParties
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_SubsidiaryOfCommonParentMember
Maximum [Member] | Apollo Affiliates and Other Related Parties [Member]      
Related Party Transaction [Line Items]      
Due to Related Parties     26us-gaap_DueToRelatedPartiesCurrentAndNoncurrent
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= msc_ApolloAffiliatesAndOtherRelatedPartiesMember
Maximum [Member] | Momentive Performance Materials Inc. [Member]      
Related Party Transaction [Line Items]      
Revenue from Related Parties 1us-gaap_RevenueFromRelatedParties
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= msc_MomentivePerformanceMaterialsIncMember
   
Due from Related Parties $ 1us-gaap_DueFromRelatedParties
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= msc_MomentivePerformanceMaterialsIncMember
  $ 1us-gaap_DueFromRelatedParties
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= msc_MomentivePerformanceMaterialsIncMember