XML 121 R100.htm IDEA: XBRL DOCUMENT
v3.6.0.2

EMPLOYEE RETIREMENT PLANS - Qualified Defined-benefit Pension Plan Assets at Fair Value by Level within the Fair Value Hierarchy (Details) - Qualified - USD ($) $ in Millions | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | --- | ---
Fair Value |  |  |
Total assets at fair value | $ 717 | $ 658 | $ 691
Total asset at net asset value | 185 | 123 |
UNITED STATES | Common and Preferred Stocks |  |  |
Fair Value |  |  |
Total assets at fair value | 260 | 253 |
Total asset at net asset value | 118 | 93 |
UNITED STATES | Private Equity and Hedge Funds |  |  |
Fair Value |  |  |
Total assets at fair value | 37 | 52 |
Total asset at net asset value |  | 3 |
UNITED STATES | Corporate Debt Securities |  |  |
Fair Value |  |  |
Total assets at fair value | 57 | 44 |
Total asset at net asset value | 2 |  |
UNITED STATES | Government and Other Debt Securities |  |  |
Fair Value |  |  |
Total assets at fair value | 50 | 67 |
UNITED STATES | Common Collective Trust Fund |  |  |
Fair Value |  |  |
Total assets at fair value | 4 | 4 |
UNITED STATES | Short-Term and other Investments |  |  |
Fair Value |  |  |
Total assets at fair value | 2 | 2 |
International | Common and Preferred Stocks |  |  |
Fair Value |  |  |
Total assets at fair value | 90 | 69 |
Total asset at net asset value | 16 | 7 |
International | Private Equity and Hedge Funds |  |  |
Fair Value |  |  |
Total assets at fair value | 56 | 24 |
Total asset at net asset value | 32 | 4 |
International | Corporate Debt Securities |  |  |
Fair Value |  |  |
Total assets at fair value | 43 | 48 |
Total asset at net asset value | 17 | 16 |
International | Government and Other Debt Securities |  |  |
Fair Value |  |  |
Total assets at fair value | 80 | 53 |
International | Short-Term and other Investments |  |  |
Fair Value |  |  |
Total assets at fair value | 38 | 42 |
Level 1 |  |  |
Fair Value |  |  |
Total assets at fair value | 323 | 291 |
Level 1 | UNITED STATES | Common and Preferred Stocks |  |  |
Fair Value |  |  |
Total assets at fair value | 142 | 127 |
Level 1 | UNITED STATES | Corporate Debt Securities |  |  |
Fair Value |  |  |
Total assets at fair value | 27 | 18 |
Level 1 | UNITED STATES | Government and Other Debt Securities |  |  |
Fair Value |  |  |
Total assets at fair value | 46 | 64 |
Level 1 | UNITED STATES | Short-Term and other Investments |  |  |
Fair Value |  |  |
Total assets at fair value | 2 | 2 |
Level 1 | International | Common and Preferred Stocks |  |  |
Fair Value |  |  |
Total assets at fair value | 74 | 55 |
Level 1 | International | Government and Other Debt Securities |  |  |
Fair Value |  |  |
Total assets at fair value | 27 | 23 |
Level 1 | International | Short-Term and other Investments |  |  |
Fair Value |  |  |
Total assets at fair value | 5 | 2 |
Level 2 |  |  |
Fair Value |  |  |
Total assets at fair value | 130 | 156 |
Level 2 | UNITED STATES | Common and Preferred Stocks |  |  |
Fair Value |  |  |
Total assets at fair value |  | 33 |
Level 2 | UNITED STATES | Corporate Debt Securities |  |  |
Fair Value |  |  |
Total assets at fair value | 28 | 26 |
Level 2 | UNITED STATES | Government and Other Debt Securities |  |  |
Fair Value |  |  |
Total assets at fair value | 4 | 3 |
Level 2 | UNITED STATES | Common Collective Trust Fund |  |  |
Fair Value |  |  |
Total assets at fair value | 4 | 4 |
Level 2 | International | Common and Preferred Stocks |  |  |
Fair Value |  |  |
Total assets at fair value |  | 7 |
Level 2 | International | Corporate Debt Securities |  |  |
Fair Value |  |  |
Total assets at fair value | 26 | 32 |
Level 2 | International | Government and Other Debt Securities |  |  |
Fair Value |  |  |
Total assets at fair value | 53 | 30 |
Level 2 | International | Short-Term and other Investments |  |  |
Fair Value |  |  |
Total assets at fair value | 15 | 21 |
Level 3 |  |  |
Fair Value |  |  |
Total assets at fair value | 79 | 88 |
Level 3 | UNITED STATES | Private Equity and Hedge Funds |  |  |
Fair Value |  |  |
Total assets at fair value | 37 | 49 |
Level 3 | International | Private Equity and Hedge Funds |  |  |
Fair Value |  |  |
Total assets at fair value | 24 | 20 |
Level 3 | International | Short-Term and other Investments |  |  |
Fair Value |  |  |
Total assets at fair value | $ 18 | $ 19 |

X
- Definition Defined Benefit Plan, Net Asset Value of Plan Assets + References No definition available. + Details
Name: | mas_DefinedBenefitPlanNetAssetValueofPlanAssets
Namespace Prefix: | mas_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value of assets that have been segregated and restricted to provide pension or postretirement benefits. Assets include, but are not limited to, stocks, bonds, other investments, earnings from investments, and contributions by the employer and employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Section 35 -Paragraph 50 -URI http://asc.fasb.org/extlink&oid=64937038&loc=d3e12355-114930 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Plan Assets -URI http://asc.fasb.org/extlink&oid=6749337 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Plan Assets -URI http://asc.fasb.org/extlink&oid=6520858 + Details
Name: | us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Details
Name: | us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis=mas_QualifiedPensionPlansofDefinedBenefitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=country_US
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=mas_CommonAndPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=mas_PrivateEquityAndHedgeFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_ForeignGovernmentDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=mas_CommonCollectiveTrustFundMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=mas_ShortTermAndOtherInvestmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=mas_InternationalMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |