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EARNINGS PER COMMON SHARE (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Numerator (basic and diluted): |  |  |  |  |  |  |  |  |  |  |
Income (loss) from continuing operations | $ 103 us-gaap_IncomeLossFromContinuingOperations | $ 542 us-gaap_IncomeLossFromContinuingOperations | $ 140 us-gaap_IncomeLossFromContinuingOperations | $ 76 us-gaap_IncomeLossFromContinuingOperations | $ 42 us-gaap_IncomeLossFromContinuingOperations | $ 111 us-gaap_IncomeLossFromContinuingOperations | $ 83 us-gaap_IncomeLossFromContinuingOperations | $ 62 us-gaap_IncomeLossFromContinuingOperations | $ 861 us-gaap_IncomeLossFromContinuingOperations | $ 298 us-gaap_IncomeLossFromContinuingOperations | $ (53)us-gaap_IncomeLossFromContinuingOperations
Less: Allocation to unvested restricted stock awards |  |  |  |  |  |  |  |  | (17)us-gaap_UndistributedEarningsAllocatedToParticipatingSecurities | (7)us-gaap_UndistributedEarningsAllocatedToParticipatingSecurities | (2)us-gaap_UndistributedEarningsAllocatedToParticipatingSecurities
Income (loss) from continuing operations attributable to common shareholders |  |  |  |  |  |  |  |  | 844 mas_LossIncomeFromContinuingOperationsAttributableToCommonShareholders | 291 mas_LossIncomeFromContinuingOperationsAttributableToCommonShareholders | (55)mas_LossIncomeFromContinuingOperationsAttributableToCommonShareholders
Loss from discontinued operations, net |  |  |  |  |  |  |  |  | (5)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity | (10)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity | (61)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity
Loss from discontinued operations attributable to common shareholders |  |  |  |  |  |  |  |  | (5)mas_IncomeLossFromDiscontinuedOperationsAttributableToCommonStockholders | (10)mas_IncomeLossFromDiscontinuedOperationsAttributableToCommonStockholders | (61)mas_IncomeLossFromDiscontinuedOperationsAttributableToCommonStockholders
Net income (loss) available to common shareholders |  |  |  |  |  |  |  |  | $ 839 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | $ 281 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | $ (116)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Denominator: |  |  |  |  |  |  |  |  |  |  |
Basic common shares (based upon weighted average) (in shares) |  |  |  |  |  |  |  |  | 349 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 350 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 349 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Add: |  |  |  |  |  |  |  |  |  |  |
Stock option dilution (in shares) |  |  |  |  |  |  |  |  | 3 us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements | 2 us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements |
Diluted common shares (in shares) |  |  |  |  |  |  |  |  | 352 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 352 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 349 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding

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- Definition (Loss) income from continuing operations attributable to common shareholders. + References No definition available. + Details
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- Definition Amount of income (loss) from continuing operations attributable to the parent. Also defined as revenue less expenses and taxes from ongoing operations before extraordinary items but after deduction of those portions of income or loss from continuing operations that are allocable to noncontrolling interests. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4613673-111683 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.13) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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- Definition Amount of income (loss) from a disposal group, net of income tax, reported as a separate component of income before extraordinary items after deduction or consideration of the amount allocable to noncontrolling interests. Includes, net of tax, income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4569616-111683 + Details
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- Definition Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 28A -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1500-109256 + Details
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