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PROPERTY AND EQUIPMENT (Details 3) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
facility
Dec. 31, 2013
Facilities held-for-sale    
Net book value $ 1,139us-gaap_PropertyPlantAndEquipmentNet $ 1,252us-gaap_PropertyPlantAndEquipmentNet
Two facilities held for sale | Cabinets and Related Products    
Facilities held-for-sale    
Net book value 18us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis
= mas_FacilitiesHeldForSaleMember
/ us-gaap_StatementBusinessSegmentsAxis
= mas_CabinetsAndRelatedProductsMember		 17us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis
= mas_FacilitiesHeldForSaleMember
/ us-gaap_StatementBusinessSegmentsAxis
= mas_CabinetsAndRelatedProductsMember
Number of facilities sold 2mas_PropertyPlantAndEquipmentNumberOfFacilitiesSold
/ us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis
= mas_FacilitiesHeldForSaleMember
/ us-gaap_StatementBusinessSegmentsAxis
= mas_CabinetsAndRelatedProductsMember		  
Asset impairment charges $ 28us-gaap_AssetImpairmentCharges
/ us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis
= mas_FacilitiesHeldForSaleMember
/ us-gaap_StatementBusinessSegmentsAxis
= mas_CabinetsAndRelatedProductsMember