XML 59 R58.htm IDEA: XBRL DOCUMENT v2.4.0.8

Debt - Additional Information (Detail) (USD $)	9 Months Ended
	Sep. 30, 2013	Mar. 31, 2013	Jun. 21, 2010
Debt Instrument [Line Items]
Aggregate amount add back to future non-cash charges		$ 1,250,000,000	$ 1,250,000,000
Credit agreement, maturity date	Mar. 28, 2018
Non-cash charges, including goodwill and other intangible asset impairment charges	250,000,000
Debt to total adjusted capitalization ratio	65.00%
Minimum interest coverage ratio	2.5
Additional borrowing capacity	1,200,000,000
Absorption of reduction to shareholders' equity to remain in compliance with covenant	705,000,000
Euros Denominated Revolver [Member]
Debt Instrument [Line Items]
Borrowing capacity, maximum	500,000,000
Swingline Loans [Member]
Debt Instrument [Line Items]
Borrowing capacity, maximum	150,000,000
Federal Funds Effective Rate [Member]
Debt Instrument [Line Items]
Either rate per annum equal to lower of prime rate Federal Funds effective LIBOR plus one percent plus applicable margin	0.50%
Libor Rate [Member]
Debt Instrument [Line Items]
Either rate per annum equal to lower of prime rate Federal Funds effective LIBOR plus one percent plus applicable margin	1.00%
Letters of Credit [Member]
Debt Instrument [Line Items]
Borrowing capacity, maximum	250,000,000
Outstanding and unused Letters of Credit	$ 92,000,000

X

- Definition

Absorption of reduction to shareholders' equity to remain in compliance with covenant.

+ References

No definition available.

+ Details

Name:	mas_AbsorptionOfReductionToShareholdersEquityToRemainInComplianceWithCovenant
Namespace Prefix:	mas_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Aggregate Amount Add Back To Future Non Cash Charges

+ References

No definition available.

+ Details

Name:	mas_AggregateAmountAddBackToFutureNonCashCharges
Namespace Prefix:	mas_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Debt Adjusted Capitalization Ratio

+ References

No definition available.

+ Details

Name:	mas_DebtAdjustedCapitalizationRatio
Namespace Prefix:	mas_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Line of credit facility increase additional borrowing.

+ References

No definition available.

+ Details

Name:	mas_LineOfCreditFacilityIncreaseAdditionalBorrowing
Namespace Prefix:	mas_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Minimum Interest Coverage Ratio

+ References

No definition available.

+ Details

Name:	mas_MinimumInterestCoverageRatio
Namespace Prefix:	mas_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Non Cash Charges Including Goodwill And Other Intangible Asset Impairment Charges

+ References

No definition available.

+ Details

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

X

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(2))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

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Namespace Prefix:	us-gaap_
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