XML 71 R41.htm IDEA: XBRL DOCUMENT v2.4.0.6

Fair Value of Financial Investments and Liabilities (Details Textual) (USD $) In Billions, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Fair Value of Financial Investments and Liabilities (Textual) [Abstract]
Estimated market value of long-term and short-term debt	$ 4.5	$ 4.0
Aggregate carrying value of long-term and short-term debt	$ 4.4	$ 4.0

X

- Definition

Aggregate carrying value of long term and short term debt.

+ References

No definition available.

+ Details

Name:	mas_AggregateCarryingValueOfLongTermAndShortTermDebt
Namespace Prefix:	mas_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Estimated market value of long term and short term debt.

+ References

No definition available.

+ Details

Name:	mas_EstimatedMarketValueOfLongTermAndShortTermDebt
Namespace Prefix:	mas_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	mas_FairValueOfFinancialInvestmentsAndLiabilitiesTextualAbstract
Namespace Prefix:	mas_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration