SEVERANCE COSTS (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
SEVERANCE COSTS
Severance and early retirement program costs	$ 12	$ 27	$ 19

Represents one-time severance and early retirement costs that are not part of a restructuring plan nor associated with a discontinued operation.

No definition available.

Name:	mas_SeveranceAndRetirementCosts
Namespace Prefix:	mas_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration