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Other Assets - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Other Assets Non Current [Line Items] |  |  |
Amortization expense related to in-store displays | $ 21 | $ 24 | $ 33
Cash spent for in-store displays | $ 23 | $ 17 | $ 32
Amortization method of in-store displays | straight-line method |  |
Minimum [Member] |  |  |
Other Assets Non Current [Line Items] |  |  |
Amortization period of in-store displays in years | 3 years |  |
Maximum [Member] |  |  |
Other Assets Non Current [Line Items] |  |  |
Amortization period of in-store displays in years | 5 years |  |

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- Definition Amortization Expense Related To In Store Displays + References No definition available. + Details
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- Definition In Store Displays Expense + References No definition available. + Details
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Namespace Prefix: | mas_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
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- Definition The amortization method of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar either by their nature or by their use in the operations of a company. The straight-line method is the preferred amortization method, unless another method better reflects the pattern in which the asset is consumed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 12, 13, 14 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 35 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=7658317&loc=d3e15372-109273 + Details
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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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