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STOCK-BASED COMPENSATION (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Stock-based compensation |  |  |
Pre-tax compensation expense | $ 47 us-gaap_AllocatedShareBasedCompensationExpense | $ 54 us-gaap_AllocatedShareBasedCompensationExpense | $ 61 us-gaap_AllocatedShareBasedCompensationExpense
Income tax benefit | 17 us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense | 20 us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense | 23 us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense
Tax rate (as a percent) | 37.00%mas_TaxRateAppliedToCompensationCostForEquityBasedPaymentArrangements | 37.00%mas_TaxRateAppliedToCompensationCostForEquityBasedPaymentArrangements | 37.00%mas_TaxRateAppliedToCompensationCostForEquityBasedPaymentArrangements
Long-term stock awards |  |  |
Stock-based compensation |  |  |
Pre-tax compensation expense | 37 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember | 34 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember | 35 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember
Stock Options |  |  |
Stock-based compensation |  |  |
Pre-tax compensation expense | 4 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember | 13 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember | 15 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember
Phantom stock awards and stock appreciation rights |  |  |
Stock-based compensation |  |  |
Pre-tax compensation expense | $ 6 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = mas_PhantomStockAwardsAndStockAppreciationRightsSARSMember | $ 7 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = mas_PhantomStockAwardsAndStockAppreciationRightsSARSMember | $ 11 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = mas_PhantomStockAwardsAndStockAppreciationRightsSARSMember

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
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- Definition The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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