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GOODWILL AND OTHER INTANGIBLE ASSETS (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Goodwill |  |  |
Gross Goodwill | $ 3,854 us-gaap_GoodwillGross | $ 3,873 us-gaap_GoodwillGross | $ 3,864 us-gaap_GoodwillGross
Accumulated Impairment Losses | (1,970)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss | (1,970)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss | (1,970)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss
Net Goodwill | 1,884 us-gaap_Goodwill | 1,903 us-gaap_Goodwill |
Changes in the carrying amount of goodwill |  |  |
Beginning balance | 1,903 us-gaap_Goodwill | 1,894 us-gaap_Goodwill |
Other | 19 us-gaap_GoodwillOtherChanges | (6)us-gaap_GoodwillOtherChanges |
Additions |  | 3 us-gaap_GoodwillAcquiredDuringPeriod |
Ending balance | 1,884 us-gaap_Goodwill | 1,903 us-gaap_Goodwill |
Cabinets and Related Products |  |  |
Goodwill |  |  |
Gross Goodwill | 240 us-gaap_GoodwillGross / us-gaap_StatementBusinessSegmentsAxis = mas_CabinetsAndRelatedProductsMember | 240 us-gaap_GoodwillGross / us-gaap_StatementBusinessSegmentsAxis = mas_CabinetsAndRelatedProductsMember | 240 us-gaap_GoodwillGross / us-gaap_StatementBusinessSegmentsAxis = mas_CabinetsAndRelatedProductsMember
Accumulated Impairment Losses | (59)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = mas_CabinetsAndRelatedProductsMember | (59)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = mas_CabinetsAndRelatedProductsMember | (59)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = mas_CabinetsAndRelatedProductsMember
Net Goodwill | 181 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mas_CabinetsAndRelatedProductsMember | 181 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mas_CabinetsAndRelatedProductsMember | 181 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mas_CabinetsAndRelatedProductsMember
Changes in the carrying amount of goodwill |  |  |
Beginning balance |  |  | 181 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mas_CabinetsAndRelatedProductsMember
Ending balance | 181 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mas_CabinetsAndRelatedProductsMember | 181 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mas_CabinetsAndRelatedProductsMember | 181 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mas_CabinetsAndRelatedProductsMember
Plumbing Products |  |  |
Goodwill |  |  |
Gross Goodwill | 531 us-gaap_GoodwillGross / us-gaap_StatementBusinessSegmentsAxis = mas_PlumbingProductsMember | 550 us-gaap_GoodwillGross / us-gaap_StatementBusinessSegmentsAxis = mas_PlumbingProductsMember | 544 us-gaap_GoodwillGross / us-gaap_StatementBusinessSegmentsAxis = mas_PlumbingProductsMember
Accumulated Impairment Losses | (340)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = mas_PlumbingProductsMember | (340)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = mas_PlumbingProductsMember | (340)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = mas_PlumbingProductsMember
Net Goodwill | 191 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mas_PlumbingProductsMember | 210 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mas_PlumbingProductsMember |
Changes in the carrying amount of goodwill |  |  |
Beginning balance | 210 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mas_PlumbingProductsMember | 204 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mas_PlumbingProductsMember |
Other | 19 us-gaap_GoodwillOtherChanges / us-gaap_StatementBusinessSegmentsAxis = mas_PlumbingProductsMember | (6)us-gaap_GoodwillOtherChanges / us-gaap_StatementBusinessSegmentsAxis = mas_PlumbingProductsMember |
Ending balance | 191 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mas_PlumbingProductsMember | 210 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mas_PlumbingProductsMember |
Installation and Other Services |  |  |
Goodwill |  |  |
Gross Goodwill | 1,806 us-gaap_GoodwillGross / us-gaap_StatementBusinessSegmentsAxis = mas_InstallationAndOtherServicesMember | 1,806 us-gaap_GoodwillGross / us-gaap_StatementBusinessSegmentsAxis = mas_InstallationAndOtherServicesMember | 1,806 us-gaap_GoodwillGross / us-gaap_StatementBusinessSegmentsAxis = mas_InstallationAndOtherServicesMember
Accumulated Impairment Losses | (762)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = mas_InstallationAndOtherServicesMember | (762)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = mas_InstallationAndOtherServicesMember | (762)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = mas_InstallationAndOtherServicesMember
Net Goodwill | 1,044 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mas_InstallationAndOtherServicesMember | 1,044 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mas_InstallationAndOtherServicesMember | 1,044 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mas_InstallationAndOtherServicesMember
Changes in the carrying amount of goodwill |  |  |
Beginning balance |  |  | 1,044 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mas_InstallationAndOtherServicesMember
Ending balance | 1,044 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mas_InstallationAndOtherServicesMember | 1,044 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mas_InstallationAndOtherServicesMember | 1,044 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mas_InstallationAndOtherServicesMember
Decorative Architectural Products |  |  |
Goodwill |  |  |
Gross Goodwill | 294 us-gaap_GoodwillGross / us-gaap_StatementBusinessSegmentsAxis = mas_DecorativeArchitecturalProductsMember | 294 us-gaap_GoodwillGross / us-gaap_StatementBusinessSegmentsAxis = mas_DecorativeArchitecturalProductsMember | 294 us-gaap_GoodwillGross / us-gaap_StatementBusinessSegmentsAxis = mas_DecorativeArchitecturalProductsMember
Accumulated Impairment Losses | (75)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = mas_DecorativeArchitecturalProductsMember | (75)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = mas_DecorativeArchitecturalProductsMember | (75)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = mas_DecorativeArchitecturalProductsMember
Net Goodwill | 219 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mas_DecorativeArchitecturalProductsMember | 219 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mas_DecorativeArchitecturalProductsMember | 219 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mas_DecorativeArchitecturalProductsMember
Changes in the carrying amount of goodwill |  |  |
Beginning balance |  |  | 219 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mas_DecorativeArchitecturalProductsMember
Ending balance | 219 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mas_DecorativeArchitecturalProductsMember | 219 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mas_DecorativeArchitecturalProductsMember | 219 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mas_DecorativeArchitecturalProductsMember
Other Specialty Products |  |  |
Goodwill |  |  |
Gross Goodwill | 983 us-gaap_GoodwillGross / us-gaap_StatementBusinessSegmentsAxis = mas_OtherSpecialtyProductsMember | 983 us-gaap_GoodwillGross / us-gaap_StatementBusinessSegmentsAxis = mas_OtherSpecialtyProductsMember | 980 us-gaap_GoodwillGross / us-gaap_StatementBusinessSegmentsAxis = mas_OtherSpecialtyProductsMember
Accumulated Impairment Losses | (734)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = mas_OtherSpecialtyProductsMember | (734)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = mas_OtherSpecialtyProductsMember | (734)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = mas_OtherSpecialtyProductsMember
Net Goodwill | 249 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mas_OtherSpecialtyProductsMember | 249 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mas_OtherSpecialtyProductsMember |
Changes in the carrying amount of goodwill |  |  |
Beginning balance |  | 246 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mas_OtherSpecialtyProductsMember |
Additions |  | 3 us-gaap_GoodwillAcquiredDuringPeriod / us-gaap_StatementBusinessSegmentsAxis = mas_OtherSpecialtyProductsMember |
Ending balance | $ 249 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mas_OtherSpecialtyProductsMember | $ 249 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mas_OtherSpecialtyProductsMember |

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