XML 127 R34.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Inventories (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2012
Inventories |
|  | (In Millions) At December 31 |
|  | 2012 |  |  | 2011 |
Finished goods |  | $ | 419 |  |  | $ | 390 |
Raw material |  |  | 278 |  |  |  | 280 |
Work in process |  |  | 95 |  |  |  | 99 |
Total |  | $ | 792 |  |  | $ | 769 |

X
- Definition Schedule Of Inventories [Text Block] + References No definition available. + Details
Name: | mas_ScheduleOfInventoriesTextBlock
Namespace Prefix: | mas_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration