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ACCOUNTING POLICIES - Receivables (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
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

X

- References

No definition available.

+ Details

Name:	us-gaap_ReceivablesAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration