XML 39 R53.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

ACCOUNTING POLICIES - Receivables (Details) - USD ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Receivables |  |
Certain receivables allowances including allowances for doubtful accounts | $ 36 | $ 33

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