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Guarantor Non-Guarantor Subsidiary Financial Information Level 4 (Details) - Consolidating Statement of Operations (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Net sales $ 5,137us-gaap_SalesRevenueNet $ 4,890us-gaap_SalesRevenueNet $ 4,756us-gaap_SalesRevenueNet
Cost of sales 4,534us-gaap_CostOfGoodsSold 4,316us-gaap_CostOfGoodsSold 4,160us-gaap_CostOfGoodsSold
Gross profit 603us-gaap_GrossProfit 574us-gaap_GrossProfit 596us-gaap_GrossProfit
Selling, general and administrative expense 361us-gaap_SellingGeneralAndAdministrativeExpense 362us-gaap_SellingGeneralAndAdministrativeExpense 322us-gaap_SellingGeneralAndAdministrativeExpense
Asset and goodwill impairment 5msc_Assetandgoodwillimpairment 181msc_Assetandgoodwillimpairment 23msc_Assetandgoodwillimpairment
Business realignment costs 47msc_BusinessRealignmentCosts 21msc_BusinessRealignmentCosts 35msc_BusinessRealignmentCosts
Other operating expense (income), net (8)us-gaap_OtherOperatingIncomeExpenseNet 1us-gaap_OtherOperatingIncomeExpenseNet 11us-gaap_OtherOperatingIncomeExpenseNet
Operating income 198us-gaap_OperatingIncomeLoss 9us-gaap_OperatingIncomeLoss 205us-gaap_OperatingIncomeLoss
Interest expense, net 308us-gaap_InterestIncomeExpenseNet 303us-gaap_InterestIncomeExpenseNet 263us-gaap_InterestIncomeExpenseNet
Intercompany interest expense (income) 0msc_IntercompanyInterestExpenseIncome 0msc_IntercompanyInterestExpenseIncome 0msc_IntercompanyInterestExpenseIncome
Loss on extinguishment of debt 0us-gaap_GainsLossesOnExtinguishmentOfDebt (6)us-gaap_GainsLossesOnExtinguishmentOfDebt 0us-gaap_GainsLossesOnExtinguishmentOfDebt
Other non-operating (income) expense, net 32us-gaap_OtherNonoperatingIncomeExpense 2us-gaap_OtherNonoperatingIncomeExpense (1)us-gaap_OtherNonoperatingIncomeExpense
(Loss) income from continuing operations before income tax and earnings from unconsolidated entities (142)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments (302)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments (57)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
Income tax (benefit) expense 26us-gaap_IncomeTaxExpenseBenefit 349us-gaap_IncomeTaxExpenseBenefit (384)us-gaap_IncomeTaxExpenseBenefit
Income from continuing operations before earnings from unconsolidated entities (168)us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest (651)us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest 327us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest
(Losses) earnings from unconsolidated entities, net of taxes 20us-gaap_IncomeLossFromEquityMethodInvestments 17us-gaap_IncomeLossFromEquityMethodInvestments 19us-gaap_IncomeLossFromEquityMethodInvestments
Net income from continuing operations   (634)us-gaap_IncomeLossFromContinuingOperations 346us-gaap_IncomeLossFromContinuingOperations
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest (148)us-gaap_ProfitLoss (634)us-gaap_ProfitLoss 346us-gaap_ProfitLoss
Net Income (Loss) Attributable to Noncontrolling Interest 0us-gaap_NetIncomeLossAttributableToNoncontrollingInterest (1)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest 0us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
Net Income (Loss) Attributable to Parent (148)us-gaap_NetIncomeLoss (633)us-gaap_NetIncomeLoss 346us-gaap_NetIncomeLoss
Comprehensive income (loss) (286)us-gaap_ComprehensiveIncomeNetOfTax (577)us-gaap_ComprehensiveIncomeNetOfTax 252us-gaap_ComprehensiveIncomeNetOfTax
Momentive Specialty Chemicals Inc. [Member]      
Net sales 2,259us-gaap_SalesRevenueNet
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
2,176us-gaap_SalesRevenueNet
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
2,120us-gaap_SalesRevenueNet
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Cost of sales 2,000us-gaap_CostOfGoodsSold
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
1,876us-gaap_CostOfGoodsSold
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
1,800us-gaap_CostOfGoodsSold
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Gross profit 259us-gaap_GrossProfit
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
300us-gaap_GrossProfit
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
320us-gaap_GrossProfit
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Selling, general and administrative expense 96us-gaap_SellingGeneralAndAdministrativeExpense
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
108us-gaap_SellingGeneralAndAdministrativeExpense
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
61us-gaap_SellingGeneralAndAdministrativeExpense
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Asset and goodwill impairment 0msc_Assetandgoodwillimpairment
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
53msc_Assetandgoodwillimpairment
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
0msc_Assetandgoodwillimpairment
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Business realignment costs 31msc_BusinessRealignmentCosts
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
12msc_BusinessRealignmentCosts
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
9msc_BusinessRealignmentCosts
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Other operating expense (income), net (11)us-gaap_OtherOperatingIncomeExpenseNet
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(1)us-gaap_OtherOperatingIncomeExpenseNet
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
8us-gaap_OtherOperatingIncomeExpenseNet
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Operating income 143us-gaap_OperatingIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
128us-gaap_OperatingIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
242us-gaap_OperatingIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Interest expense, net 300us-gaap_InterestIncomeExpenseNet
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
296us-gaap_InterestIncomeExpenseNet
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
234us-gaap_InterestIncomeExpenseNet
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Intercompany interest expense (income) (92)msc_IntercompanyInterestExpenseIncome
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(103)msc_IntercompanyInterestExpenseIncome
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(54)msc_IntercompanyInterestExpenseIncome
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Loss on extinguishment of debt   4us-gaap_GainsLossesOnExtinguishmentOfDebt
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
 
Other non-operating (income) expense, net 101us-gaap_OtherNonoperatingIncomeExpense
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(45)us-gaap_OtherNonoperatingIncomeExpense
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(10)us-gaap_OtherNonoperatingIncomeExpense
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(Loss) income from continuing operations before income tax and earnings from unconsolidated entities (166)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(24)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
72us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Income tax (benefit) expense (6)us-gaap_IncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
346us-gaap_IncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(371)us-gaap_IncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Income from continuing operations before earnings from unconsolidated entities (160)us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(370)us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
443us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(Losses) earnings from unconsolidated entities, net of taxes 12us-gaap_IncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(263)us-gaap_IncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(97)us-gaap_IncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Net income from continuing operations   (633)us-gaap_IncomeLossFromContinuingOperations
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
346us-gaap_IncomeLossFromContinuingOperations
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest (148)us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
   
Comprehensive income (loss) (286)us-gaap_ComprehensiveIncomeNetOfTax
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(577)us-gaap_ComprehensiveIncomeNetOfTax
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
252us-gaap_ComprehensiveIncomeNetOfTax
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Combined Subsidiary Guarantors [Member]      
Net sales 0us-gaap_SalesRevenueNet
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
0us-gaap_SalesRevenueNet
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
0us-gaap_SalesRevenueNet
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Cost of sales 0us-gaap_CostOfGoodsSold
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
0us-gaap_CostOfGoodsSold
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
0us-gaap_CostOfGoodsSold
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Gross profit 0us-gaap_GrossProfit
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
0us-gaap_GrossProfit
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
0us-gaap_GrossProfit
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Selling, general and administrative expense 0us-gaap_SellingGeneralAndAdministrativeExpense
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
0us-gaap_SellingGeneralAndAdministrativeExpense
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
0us-gaap_SellingGeneralAndAdministrativeExpense
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Asset and goodwill impairment 0msc_Assetandgoodwillimpairment
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
0msc_Assetandgoodwillimpairment
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
0msc_Assetandgoodwillimpairment
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Business realignment costs 0msc_BusinessRealignmentCosts
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
0msc_BusinessRealignmentCosts
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
0msc_BusinessRealignmentCosts
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Other operating expense (income), net (4)us-gaap_OtherOperatingIncomeExpenseNet
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
(1)us-gaap_OtherOperatingIncomeExpenseNet
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
(1)us-gaap_OtherOperatingIncomeExpenseNet
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Operating income 4us-gaap_OperatingIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
1us-gaap_OperatingIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
1us-gaap_OperatingIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Interest expense, net 0us-gaap_InterestIncomeExpenseNet
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
0us-gaap_InterestIncomeExpenseNet
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
0us-gaap_InterestIncomeExpenseNet
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Intercompany interest expense (income) (1)msc_IntercompanyInterestExpenseIncome
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
(1)msc_IntercompanyInterestExpenseIncome
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
(1)msc_IntercompanyInterestExpenseIncome
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Loss on extinguishment of debt   0us-gaap_GainsLossesOnExtinguishmentOfDebt
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
 
Other non-operating (income) expense, net 0us-gaap_OtherNonoperatingIncomeExpense
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
0us-gaap_OtherNonoperatingIncomeExpense
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
0us-gaap_OtherNonoperatingIncomeExpense
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
(Loss) income from continuing operations before income tax and earnings from unconsolidated entities 5us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
2us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
2us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Income tax (benefit) expense 0us-gaap_IncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
0us-gaap_IncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
0us-gaap_IncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Income from continuing operations before earnings from unconsolidated entities 5us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
2us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
2us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
(Losses) earnings from unconsolidated entities, net of taxes 31us-gaap_IncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
(170)us-gaap_IncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
(70)us-gaap_IncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Net income from continuing operations   (168)us-gaap_IncomeLossFromContinuingOperations
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
(68)us-gaap_IncomeLossFromContinuingOperations
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest 36us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
   
Comprehensive income (loss) 35us-gaap_ComprehensiveIncomeNetOfTax
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
(169)us-gaap_ComprehensiveIncomeNetOfTax
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
(69)us-gaap_ComprehensiveIncomeNetOfTax
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Combined Non-Guarantor Subsidiaries [Member]      
Net sales 3,109us-gaap_SalesRevenueNet
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
2,919us-gaap_SalesRevenueNet
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
2,902us-gaap_SalesRevenueNet
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Cost of sales 2,765us-gaap_CostOfGoodsSold
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
2,645us-gaap_CostOfGoodsSold
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
2,626us-gaap_CostOfGoodsSold
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Gross profit 344us-gaap_GrossProfit
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
274us-gaap_GrossProfit
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
276us-gaap_GrossProfit
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Selling, general and administrative expense 265us-gaap_SellingGeneralAndAdministrativeExpense
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
254us-gaap_SellingGeneralAndAdministrativeExpense
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
261us-gaap_SellingGeneralAndAdministrativeExpense
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Asset and goodwill impairment 5msc_Assetandgoodwillimpairment
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
128msc_Assetandgoodwillimpairment
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
23msc_Assetandgoodwillimpairment
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Business realignment costs 16msc_BusinessRealignmentCosts
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
9msc_BusinessRealignmentCosts
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
26msc_BusinessRealignmentCosts
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Other operating expense (income), net 7us-gaap_OtherOperatingIncomeExpenseNet
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
3us-gaap_OtherOperatingIncomeExpenseNet
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
4us-gaap_OtherOperatingIncomeExpenseNet
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Operating income 51us-gaap_OperatingIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
(120)us-gaap_OperatingIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
(38)us-gaap_OperatingIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Interest expense, net 8us-gaap_InterestIncomeExpenseNet
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
7us-gaap_InterestIncomeExpenseNet
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
29us-gaap_InterestIncomeExpenseNet
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Intercompany interest expense (income) 93msc_IntercompanyInterestExpenseIncome
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
104msc_IntercompanyInterestExpenseIncome
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
55msc_IntercompanyInterestExpenseIncome
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Loss on extinguishment of debt   2us-gaap_GainsLossesOnExtinguishmentOfDebt
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
 
Other non-operating (income) expense, net (69)us-gaap_OtherNonoperatingIncomeExpense
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
47us-gaap_OtherNonoperatingIncomeExpense
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
9us-gaap_OtherNonoperatingIncomeExpense
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
(Loss) income from continuing operations before income tax and earnings from unconsolidated entities 19us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
(280)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
(131)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Income tax (benefit) expense 32us-gaap_IncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
3us-gaap_IncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
(13)us-gaap_IncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Income from continuing operations before earnings from unconsolidated entities (13)us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
(283)us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
(118)us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
(Losses) earnings from unconsolidated entities, net of taxes 4us-gaap_IncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
4us-gaap_IncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
3us-gaap_IncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Net income from continuing operations   (279)us-gaap_IncomeLossFromContinuingOperations
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
(115)us-gaap_IncomeLossFromContinuingOperations
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest (9)us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
   
Comprehensive income (loss) (86)us-gaap_ComprehensiveIncomeNetOfTax
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
(253)us-gaap_ComprehensiveIncomeNetOfTax
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
(207)us-gaap_ComprehensiveIncomeNetOfTax
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Eliminations [Member]      
Net sales (231)us-gaap_SalesRevenueNet
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
(205)us-gaap_SalesRevenueNet
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
(266)us-gaap_SalesRevenueNet
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
Cost of sales (231)us-gaap_CostOfGoodsSold
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
(205)us-gaap_CostOfGoodsSold
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
(266)us-gaap_CostOfGoodsSold
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
Gross profit 0us-gaap_GrossProfit
/ dei_LegalEntityAxis
= us-gaap_ConsolidationEliminationsMember
0us-gaap_GrossProfit
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0us-gaap_GrossProfit
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Selling, general and administrative expense 0us-gaap_SellingGeneralAndAdministrativeExpense
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0us-gaap_SellingGeneralAndAdministrativeExpense
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0us-gaap_SellingGeneralAndAdministrativeExpense
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Asset and goodwill impairment 0msc_Assetandgoodwillimpairment
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0msc_Assetandgoodwillimpairment
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0msc_Assetandgoodwillimpairment
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Business realignment costs 0msc_BusinessRealignmentCosts
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0msc_BusinessRealignmentCosts
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0msc_BusinessRealignmentCosts
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0us-gaap_OtherOperatingIncomeExpenseNet
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0us-gaap_OtherOperatingIncomeExpenseNet
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0us-gaap_OperatingIncomeLoss
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0us-gaap_OperatingIncomeLoss
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0msc_IntercompanyInterestExpenseIncome
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Loss on extinguishment of debt   0us-gaap_GainsLossesOnExtinguishmentOfDebt
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0us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest
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183us-gaap_IncomeLossFromEquityMethodInvestments
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183us-gaap_IncomeLossFromContinuingOperations
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Net Income (Loss), Including Portion Attributable to Noncontrolling Interest (27)us-gaap_ProfitLoss
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Comprehensive income (loss) $ 51us-gaap_ComprehensiveIncomeNetOfTax
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$ 422us-gaap_ComprehensiveIncomeNetOfTax
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