XML 75 R50.htm IDEA: XBRL DOCUMENT
v3.8.0.1

ACCOUNTING POLICIES - Depreciation (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Property and equipment |  |  |
Depreciation expense | $ 116 | $ 124 | $ 116
Buildings | Minimum |  |  |
Property and equipment |  |  |
Annual depreciation rates (as a percent) | 2.00% |  |
Buildings | Maximum |  |  |
Property and equipment |  |  |
Annual depreciation rates (as a percent) | 10.00% |  |
Computer Equipment | Minimum |  |  |
Property and equipment |  |  |
Annual depreciation rates (as a percent) | 17.00% |  |
Computer Equipment | Maximum |  |  |
Property and equipment |  |  |
Annual depreciation rates (as a percent) | 33.00% |  |
Machinery and equipment | Minimum |  |  |
Property and equipment |  |  |
Annual depreciation rates (as a percent) | 5.00% |  |
Machinery and equipment | Maximum |  |  |
Property and equipment |  |  |
Annual depreciation rates (as a percent) | 33.00% |  |

X
- Definition Annual Depreciation Rate For Property and Equipment. + References No definition available. + Details
Name: | mas_AnnualDepreciationRatePropertyAndEquipment
Namespace Prefix: | mas_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
Name: | us-gaap_Depreciation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition 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. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_BuildingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_ComputerEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_MachineryAndEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |