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OTHER COMMITMENTS AND CONTINGENCIES (Details) (Private equity funds, capital calls, Maximum, USD $) In Millions, unless otherwise specified | Dec. 31, 2014
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Private equity funds, capital calls | Maximum |
Other Commitments and Contingencies |
Company's obligation to make capital additional contributions | $ 9 us-gaap_OtherCommitment / us-gaap_OtherCommitmentsAxis = mas_PrivateEquityFundsCapitalCallsMember / us-gaap_RangeAxis = us-gaap_MaximumMember

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- Definition Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions. + References No definition available. + Details
Name: | us-gaap_OtherCommitment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | us-gaap_SupplyCommitmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration