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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Details 3) (USD $) In Millions, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Foreign currency exchange contracts |  |
Derivative instruments and hedging activities |  |
Notional Amount | $ 55 invest_DerivativeNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CurrencySwapMember | $ 53 invest_DerivativeNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CurrencySwapMember
Foreign currency exchange contracts | Receivables | Recurring | Level 2 |  |
Derivative instruments and hedging activities |  |
Assets | 6 us-gaap_DerivativeFairValueOfDerivativeAsset / us-gaap_BalanceSheetLocationAxis = mas_ReceivablesMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CurrencySwapMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember |
Foreign currency exchange contracts | Accrued liabilities. | Recurring | Level 2 |  |
Derivative instruments and hedging activities |  |
Liabilities |  | (2)us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_BalanceSheetLocationAxis = us-gaap_AccruedLiabilitiesMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CurrencySwapMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Foreign currency forward contracts |  |
Derivative instruments and hedging activities |  |
Notional Amount | 79 invest_DerivativeNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeForwardMember | 88 invest_DerivativeNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeForwardMember
Foreign currency forward contracts | Receivables | Recurring | Level 2 |  |
Derivative instruments and hedging activities |  |
Assets | 2 us-gaap_DerivativeFairValueOfDerivativeAsset / us-gaap_BalanceSheetLocationAxis = mas_ReceivablesMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeForwardMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember |
Foreign currency forward contracts | Accrued liabilities. | Recurring | Level 2 |  |
Derivative instruments and hedging activities |  |
Liabilities | (1)us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_BalanceSheetLocationAxis = us-gaap_AccruedLiabilitiesMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeForwardMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember | (1)us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_BalanceSheetLocationAxis = us-gaap_AccruedLiabilitiesMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeForwardMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
Metals contracts |  |
Derivative instruments and hedging activities |  |
Notional Amount | 70 invest_DerivativeNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = mas_MetalContractMember | 48 invest_DerivativeNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = mas_MetalContractMember
Metals contracts | Accrued liabilities. | Recurring | Level 2 |  |
Derivative instruments and hedging activities |  |
Liabilities | $ (2)us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_BalanceSheetLocationAxis = us-gaap_AccruedLiabilitiesMember / us-gaap_DerivativeInstrumentRiskAxis = mas_MetalContractMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember | $ (2)us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_BalanceSheetLocationAxis = us-gaap_AccruedLiabilitiesMember / us-gaap_DerivativeInstrumentRiskAxis = mas_MetalContractMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Fair value before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=28370219&loc=SL20226000-175313 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=20225523&loc=SL20225862-175312 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624163-113959 + Details
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- Definition Fair value before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=28370219&loc=SL20226000-175313 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=20225523&loc=SL20225862-175312 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624163-113959 + Details
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