ACCOUNTING POLICIES - Customer Promotion Costs (Details)	12 Months Ended
Dec. 31, 2016
Minimum
Customer promotion costs
Expected useful life of product	3 years
Maximum
Customer promotion costs
Expected useful life of product	5 years

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	mas_CustomerPromotionCostsLineItems
Namespace Prefix:	mas_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration