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DISCONTINUED OPERATIONS (Details) (USD $)
In Millions, unless otherwise specified
1 Months Ended 3 Months Ended 12 Months Ended 0 Months Ended
Dec. 31, 2013
Dec. 31, 2014
Mar. 31, 2013
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Sep. 30, 2014
Selected financial information for the discontinued operations              
Discontinued operation transaction cost   $ 6mas_DisposalGroupIncludingDiscontinuedOperationTransactionCost          
Net proceeds from disposition of discontinued businesses 17mas_NetProceedsFromSaleOfDiscontinuedOperations            
Net sales         265us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue 321us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue  
Operating loss from discontinued operations         (7)us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodBeforeIncomeTax (44)us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodBeforeIncomeTax  
Impairment of assets held for sale     (10)us-gaap_DiscontinuedOperationProvisionForLossGainOnDisposalBeforeIncomeTax   (10)us-gaap_DiscontinuedOperationProvisionForLossGainOnDisposalBeforeIncomeTax (3)us-gaap_DiscontinuedOperationProvisionForLossGainOnDisposalBeforeIncomeTax  
(Loss) gain on disposal of discontinued operations, net       (6)us-gaap_DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax 3us-gaap_DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax (6)us-gaap_DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax  
Loss before income tax       (6)us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax (14)us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax (53)us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax  
Income tax (benefit) expense       (1)us-gaap_DiscontinuedOperationTaxEffectOfDiscontinuedOperation (4)us-gaap_DiscontinuedOperationTaxEffectOfDiscontinuedOperation 8us-gaap_DiscontinuedOperationTaxEffectOfDiscontinuedOperation  
Loss from discontinued operations, net       (5)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity (10)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity (61)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity  
Currency translation expense related to sale of the ready-to-assemble cabinet business         $ 18mas_CurrencyTranslationExpenseRelatedToSaleOfBusiness    
Spinoff of Installation and Other Services              
Selected financial information for the discontinued operations              
Percentage of businesses planned for spinoff             100.00%mas_PercentageInstallationAndOtherServicesBusinessPlannedForSpinoff
/ dei_LegalEntityAxis
= us-gaap_SpinoffMember