GOODWILL AND OTHER INTANGIBLE ASSETS (Details 2) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Goodwill and other intangible assets
Pre-tax impairment charges for goodwill	$ 0us-gaap_GoodwillImpairmentLoss	$ 0us-gaap_GoodwillImpairmentLoss	$ 0us-gaap_GoodwillImpairmentLoss
Impairment of long-lived assets		0
Other indefinite-lived intangible assets	131	133
Pre-tax impairment charges for other indefinite-lived intangible assets			42
After tax impairment charges for other indefinite-lived intangible assets			27
Carrying value of definite-lived intangible assets	14us-gaap_FiniteLivedIntangibleAssetsNet	16us-gaap_FiniteLivedIntangibleAssetsNet
Accumulated amortization	65	62
Amortization expense related to the definite-lived intangible assets	5us-gaap_AmortizationOfIntangibleAssets	5us-gaap_AmortizationOfIntangibleAssets	6us-gaap_AmortizationOfIntangibleAssets
Amortization expense related to the definite-lived intangible assets, 2015	5
Amortization expense related to the definite-lived intangible assets, 2016	3
Amortization expense related to the definite-lived intangible assets, 2017	1
Amortization expense related to the definite-lived intangible assets, 2018	1
Amortization expense related to the definite-lived intangible assets, 2019	$ 1
Weighted average
Goodwill and other intangible assets
Weighted average amortization period	6 years	6 years

Impairment Of Intangible Assets Indefinite Lived Excluding Goodwill After Tax

No definition available.

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Balance Type:	debit
Period Type:	duration

- Details

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Namespace Prefix:	mas_
Data Type:	xbrli:stringItemType
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Period Type:	duration

- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

+ References

+ Details

Name:	us-gaap_AmortizationOfIntangibleAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of amortization expense expected to be recognized during the next fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References