XML 77 R38.htm IDEA: XBRL DOCUMENT v3.2.0.727

Discontinued Operations (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended	6 Months Ended
	Sep. 30, 2014	Sep. 30, 2014	Jun. 30, 2015
Selected financial information of discontinued operations
Issuance of TopBuild Corp. debt			$ 200
Spinoff of Installation and Other Services
Selected financial information of discontinued operations
Percentage of businesses planned for spinoff	100.00%
Issuance of TopBuild Corp. debt		$ 200

X

- Definition

Represents the percentage of installation and other services business planned for spinoff.

+ References

No definition available.

+ Details

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

X

- Definition

The cash inflow from a debt related to discontinued operations initially having maturity due after one year or beyond the operating cycle, if longer.

+ References

No definition available.

+ Details

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

X

- References

No definition available.

+ Details

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

X

- Details

Name:	dei_LegalEntityAxis=us-gaap_SpinoffMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: