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ACCOUNTING POLICIES - Receivables (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
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Receivables |  |
Certain receivables allowances including allowances for doubtful accounts | $ 51 | $ 59

X
- Definition Represents current accounts receivables allowances including allowances for doubtful accounts. + References No definition available. + Details
Name: | mas_AllowancesAccountsReceivableCurrent
Namespace Prefix: | mas_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_ReceivablesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration