10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended March 31, 2013

Commission file number: 1-5794

Masco Corporation

(Exact name of Registrant as Specified in its Charter)

Delaware	38-1794485
(State or Other Jurisdiction of Incorporation)	(IRS Employer Identification No.)
21001 Van Born Road, Taylor, Michigan	48180
(Address of Principal Executive Offices)	(Zip Code)

(313) 274-7400

(Registrant’s telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    x  Yes    ¨  No

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate website, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    x  Yes    ¨  No

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer	x	Accelerated filer	¨
Non-accelerated filer	¨  (Do not check if a smaller reporting company)	Smaller reporting company	¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    ¨  Yes    x  No

Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date.

Class	Shares Outstanding at April 26, 2013
Common stock, par value $1.00 per share	356,866,800

MASCO CORPORATION

INDEX

		Page No.
PART I.	FINANCIAL INFORMATION
Item 1.	Financial Statements:
	Condensed Consolidated Balance Sheets – as at March 31, 2013 and December 31, 2012		1
	Condensed Consolidated Statements of Operations for the Three Months Ended March 31, 2013 and 2012		2
	Condensed Consolidated Statements of Comprehensive Income (Loss) for the Three Months Ended March 31, 2013 and 2012		3
	Condensed Consolidated Statements of Cash Flows for the Three Months Ended March 31, 2013 and 2012		4
	Consolidated Statements of Shareholders’ Equity for the Three Months Ended March 31, 2013 and 2012		5
	Notes to Condensed Consolidated Financial Statements		6-20
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations		21-26
Item 4.	Controls and Procedures		27
PART II.	OTHER INFORMATION		28-30
Item 1.	Legal Proceedings
Item 1A.	Risk Factors
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds
Item 6.	Exhibits
	Signature

MASCO CORPORATION

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited)

March 31, 2013 and December 31, 2012

(In Millions, Except Share Data)

	March 31,			December 31,
	2013			2012
ASSETS
Current assets:
Cash and cash investments	$	1,032		$	1,351
Receivables		1,174			933
Prepaid expenses and other		107			107
Assets held for sale		98			100
Inventories:
Finished goods		408			368
Raw material		261			266
Work in process		94			92
		763			726
Total current assets		3,174			3,217
Property and equipment, net		1,294			1,326
Goodwill		1,891			1,894
Other intangible assets, net		150			151
Other assets		182			184
Assets held for sale		88			103
Total assets	$	6,779		$	6,875
LIABILITIES
Current liabilities:
Notes payable	$	206		$	206
Accounts payable		863			788
Accrued liabilities		714			823
Liabilities held for sale		43			45
Total current liabilities		1,826			1,862
Long-term debt		3,421			3,422
Deferred income taxes and other		1,037			1,053
Liabilities held for sale		—			4
Total liabilities		6,284			6,341
Commitments and contingencies
EQUITY
Masco Corporation’s shareholders’ equity:
Common shares, par value $1 per share Authorized shares: 1,400,000,000; issued and outstanding: 2013 – 349,100,000; 2012 – 349,000,000		349			349
Preferred shares authorized: 1,000,000; issued and outstanding: 2013 – None; 2012 – None		—			—
Paid-in capital		—			16
Accumulated deficit		(103	)		(102	)
Accumulated other comprehensive income		36			59
Total Masco Corporation’s shareholders’ equity		282			322
Noncontrolling interest		213			212
Total equity		495			534
Total liabilities and equity	$	6,779		$	6,875

See notes to condensed consolidated financial statements.

1

MASCO CORPORATION

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited)

For the Three Months Ended March 31, 2013 and 2012

(In Millions Except Per Common Share Data)

	Three Months Ended March 31,
	2013			2012
Net sales	$	1,876		$	1,806
Cost of sales		1,368			1,322
Gross profit		508			484
Selling, general and administrative expenses		376			377
Income from litigation settlements, net		—			(2	)
Operating profit		132			109
Other income (expense), net:
Interest expense		(60	)		(64	)
Other, net		7			15
		(53	)		(49	)
Income from continuing operations before income taxes		79			60
Income taxes		14			7
Income from continuing operations		65			53
Loss from discontinued operations		(9	)		(9	)
Net income		56			44
Less: Net income attributable to noncontrolling interest		9			11
Net income attributable to Masco Corporation	$	47		$	33
Income per common share attributable to Masco Corporation:
Basic:
Income from continuing operations	$	.16		$	.12
Loss from discontinued operations		(.03	)		(.03	)
Net income	$	.13		$	.09
Diluted:
Income from continuing operations	$	.16		$	.12
Loss from discontinued operations		(.03	)		(.03	)
Net income	$	.13		$	.09
Amounts attributable to Masco Corporation:
Income from continuing operations	$	56		$	42
Loss from discontinued operations		(9	)		(9	)
Net income	$	47		$	33

See notes to condensed consolidated financial statements.

2

MASCO CORPORATION

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited)

For the Three Months Ended March 31, 2013 and 2012

(In Millions)

	Three Months Ended March 31,
	2013			2012
Net income	$	56		$	44
Less: Net income attributable to noncontrolling interest		9			11
Net income attributable to Masco Corporation	$	47		$	33
Other comprehensive income (loss), net of tax (see Footnote K):
Cumulative translation adjustment		(36	)		30
Interest rate swaps, net of income tax of $— and $—, respectively		—			—
Unrecognized pension prior service cost and net loss, net of income tax of $— and $—, respectively		5			4
Other comprehensive (loss) income		(31	)		34
Less: Other comprehensive (loss) income attributable to noncontrolling interest		(8	)		7
Other comprehensive (loss) income attributable to Masco Corporation	$	(23	)	$	27
Total comprehensive income	$	25		$	78
Less: Total comprehensive income attributable to noncontrolling interest		1			18
Total comprehensive income attributable to Masco Corporation	$	24		$	60

See notes to condensed consolidated financial statements.

3

MASCO CORPORATION

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited)

For the Three Months Ended March 31, 2013 and 2012

(In Millions)

	Three Months Ended
	March 31,
	2013			2012
CASH FLOWS FROM (FOR) OPERATING ACTIVITIES:
Cash provided by operations	$	130		$	90
Increase in receivables		(263	)		(272	)
Increase in inventories		(43	)		(50	)
(Decrease) increase in accounts payable and accrued liabilities, net		(34	)		65
Net cash for operating activities		(210	)		(167	)
CASH FLOWS FROM (FOR) FINANCING ACTIVITIES:
Purchase of Company common stock		(35	)		(8	)
Cash dividends paid		(26	)		(26	)
New Credit Agreement costs		(4	)		—
Issuance of Notes, net of issuance costs		—			396
Retirement of Notes		—			(46	)
Payment for settlement of swaps		—			(25	)
Payment of debt		—			(1	)
Net cash (for) from financing activities		(65	)		290
CASH FLOWS FROM (FOR) INVESTING ACTIVITIES:
Capital expenditures		(31	)		(24	)
Acquisition of companies, net of cash acquired		(5	)		—
Proceeds from disposition of:
Other financial investments		5			23
Property and equipment		5			8
Purchases of other financial investments		—			(1	)
Other, net		(4	)		(8	)
Net cash for investing activities		(30	)		(2	)
Effect of exchange rate changes on cash and cash investments		(14	)		11
CASH AND CASH INVESTMENTS:
(Decrease) increase for the period		(319	)		132
At January 1		1,351			1,656
At March 31	$	1,032		$	1,788

See notes to condensed consolidated financial statements.

4

MASCO CORPORATION

CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY (Unaudited)

For The Three Months Ended March 31, 2013 and 2012

																(In Millions)
	Total			Common Shares ($ 1 par value)			Paid-In Capital			(Accumulated) Deficit) Retained Earnings			Accumulated Other Comprehensive Income			Noncontrolling Interest
Balance, January 1, 2012	$	742		$	348		$	65		$	38		$	76		$	215
Total comprehensive income		78									33			27			18
Shares issued		—			2			(2	)
Shares retired:
Repurchased		(8	)		(1	)		(7	)
Surrendered (non-cash)		(7	)					(7	)
Cash dividends declared		(26	)								(26	)
Stock-based compensation		13						13
Balance, March 31, 2012	$	792		$	349		$	62		$	45		$	103		$	233
Balance, January 1, 2013	$	534		$	349		$	16		$	(102	)	$	59		$	212
Total comprehensive income		25									47			(23	)		1
Shares issued		(7	)		2			(9	)
Shares retired:
Repurchased		(35	)		(2	)		(11	)		(22	)
Surrendered (non-cash)		(10	)					(10	)
Cash dividends declared		(26	)								(26	)
Stock-based compensation		14						14
Balance, March 31, 2013	$	495		$	349		$	—		$	(103	)	$	36		$	213

See notes to consolidated financial statements.

5

MASCO CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Unaudited)

A. In the opinion of the Company, the accompanying unaudited condensed consolidated financial statements contain all adjustments, of a normal recurring nature, necessary to present fairly its financial position as at March 31, 2013 and the results of operations and cash flows for the three months ended March 31, 2013 and 2012. The condensed consolidated balance sheet at December 31, 2012 was derived from audited financial statements.

Certain prior-year amounts have been reclassified to conform to the 2013 presentation in the condensed consolidated financial statements. In the Company’s condensed consolidated balance sheets, assets and liabilities related to the 2013 discontinued operations have been separately presented at March 31, 2013 and December 31, 2012. The results of operations related to the 2013 discontinued operations have been separately stated in the accompanying condensed consolidated statements of operations for the three months ended March 31, 2013 and 2012. In the Company’s condensed consolidated statements of cash flows for the three months ended March 31, 2013 and 2012, cash flows from discontinued operations are not separately classified.

Recently Issued Accounting Pronouncements. On January 1, 2013, the Company adopted new accounting guidance requiring disclosure of amounts reclassified from accumulated other comprehensive income. The adoption of this new guidance did not have an impact on the Company’s financial position or its results of operations.

B. In the first quarter of 2013, the Company determined that Tvilum, its Danish ready-to-assemble cabinet business, is no longer core to its long-term growth strategy and, accordingly, the Company has embarked on a plan for disposition. The Company has accounted for this business and those which were sold in 2012 as discontinued operations.

Selected financial information for the discontinued operations, during the period owned by the Company, was as follows, in millions:

	Three Months Ended
	March 31,
	2013			2012
Net Sales	$	59		$	89
Operating loss from discontinued operations	$	(3	)	$	(11	)
Impairment of assets		(10	)		—
Loss on disposal of discontinued operations, net		—			(1	)
Loss before income tax		(13	)		(12	)
Income tax benefit		(4	)		(3	)
Loss from discontinued operations	$	(9	)	$	(9	)

Included in impairment of assets in 2013 is the impairment of fixed assets held for sale. During the first quarter of 2013, the Company estimated the fair value of the business held for sale, using unobservable inputs (Level 3). After considering the deferred gains reported in Accumulated Other Comprehensive Income, the Company recorded an impairment of $10 million in the first quarter of 2013.

6

MASCO CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Unaudited) (continued)

Note B – concluded:

The following balance sheet items have been reclassified as held for sale:

	March 31,		December 31,
	2013		2012
Receivables	$	32	$	32
Inventories		64		66
Prepaid expenses and other		2		2
Property and equipment, net		88		103
Total assets	$	186	$	203
Accounts payable	$	31	$	31
Accrued liabilities		12		14
Deferred income taxes		—		4
Total liabilities	$	43	$	49

7

MASCO CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Unaudited) (continued)

C. The changes in the carrying amount of goodwill for the three months ended March 31, 2013, by segment, were as follows, in millions:

	Gross Goodwill		Accumulated			Net Goodwill
	At		Impairment			At
	Mar. 31, 2013		Losses			Mar. 31, 2013
Cabinets and Related Products	$	240	$	(59	)	$	181
Plumbing Products		539		(340	)		199
Installation and Other Services		1,806		(762	)		1,044
Decorative Architectural Products		294		(75	)		219
Other Specialty Products		982		(734	)		248
Total	$	3,861	$	(1,970	)	$	1,891

	Gross Goodwill At Dec. 31, 2012		Accumulated Impairment Losses			Net Goodwill At Dec. 31, 2012		Other(A)			Additions(B)		Net Goodwill At Mar. 31, 2013
Cabinets and Related Products	$	240	$	(59	)	$	181	$	—		$	—	$	181
Plumbing Products		544		(340	)		204		(5	)		—		199
Installation and Other Services		1,806		(762	)		1,044		—			—		1,044
Decorative Architectural Products		294		(75	)		219		—			—		219
Other Specialty Products		980		(734	)		246		—			2		248
Total	$	3,864	$	(1,970	)	$	1,894	$	(5	)	$	2	$	1,891

(A) Other principally includes the effect of foreign currency translation.

(B) Additions include the acquisition of a U.K. door business.

Other indefinite-lived intangible assets were $132 million at both March 31, 2013 and December 31, 2012, and principally included registered trademarks. The carrying value of the Company’s definite-lived intangible assets was $18 million (net of accumulated amortization of $58 million) at March 31, 2013 and $19 million (net of accumulated amortization of $57 million) at December 31, 2012, and principally included customer relationships and non-compete agreements.

8

MASCO CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Unaudited) (continued)

D. Depreciation and amortization expense, including discontinued operations, was $49 million and $55 million, including accelerated depreciation, relating to business rationalization initiatives, of $4 million and $7 million, for the three months ended March 31, 2013 and 2012, respectively.

E. The Company has maintained investments in available-for-sale securities and a number of private equity funds, principally as part of its tax planning strategies, as any gains enhance the utilization of any current and future tax capital losses. Financial investments included in other assets were as follows, in millions:

	March 31,		December 31,
	2013		2012
Auction rate securities	$	22	$	22
Total recurring investments		22		22
Private equity funds		67		69
Other investments		4		4
Total non-recurring investments		71		73
Total	$	93	$	95

The Company’s investments in available-for-sale securities at March 31, 2013 and December 31, 2012 were as follows, in millions:

			Pre-tax
			Unrealized		Unrealized		Recorded
	Cost Basis		Gains		Losses		Basis
March 31, 2013	$	19	$	3	$	—	$	22
December 31, 2012	$	19	$	3	$	—	$	22

Recurring Fair Value Measurements. Financial investments measured at fair value on a recurring basis at each reporting period and the amounts for each level within the fair value hierarchy were as follows, in millions:

			Fair Value Measurements Using
					Significant
			Quoted		Other		Significant
			Market		Observable		Unobservable
	Mar. 31,		Prices		Inputs		Inputs
	2013		(Level 1)		(Level 2)		(Level 3)
Auction rate securities	$	22		—		—	$	22
Total	$	22	$	—	$	—	$	22

			Fair Value Measurements Using
					Significant
			Quoted		Other		Significant
			Market		Observable		Unobservable
	Dec. 31,		Prices		Inputs		Inputs
	2012		(Level 1)		(Level 2)		(Level 3)
Auction rate securities	$	22	$	—	$	—	$	22
Total	$	22	$	—	$	—	$	22

9

MASCO CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Unaudited) (continued)

Note E – concluded:

The fair value of the auction rate securities held by the Company have been estimated, on a recurring basis, using a discounted cash flow model (Level 3 input). The significant inputs in the discounted cash flow model used to value the auction rate securities include the expected maturity date of auction rate securities, discount rate used to determine the present value of expected cash flows and the assumptions for credit defaults, since the auction rate securities are backed by credit default swap agreements.

The following table summarizes the changes in Level 3 financial assets measured at fair value on a recurring basis for the three months ended March 31, 2013 and the year ended December 31, 2012, in millions:

	March 31, 2013		December 31, 2012
	Auction Rate		Auction Rate
	Securities		Securities
Fair value at beginning of period	$	22	$	22
Total losses included in earnings		—		—
Unrealized (losses)		—		—
Purchases		—		—
Settlements		—		—
Transfer from Level 3 to Level 2		—		—
Fair value at period end	$	22	$	22

Non-Recurring Fair Value Measurements. During the three months ended March 31, 2013 and 2012, the Company did not measure any financial investments at fair value on a non-recurring basis, as there was no other-than-temporary decline in the estimated value of private equity funds.

The Company did not have any transfers between Level 1 and Level 2 financial assets in the three months ended March 31, 2013 or 2012.

Realized Gains. Income from financial investments net, included in other, net, within other income (expense), net, was as follows, in millions:

	Three Months Ended
	March 31,
	2013		2012
Realized gains from private equity funds	$	3	$	16
Total income from financial investments	$	3	$	16

The fair value of the Company’s short-term and long-term fixed-rate debt instruments is based principally upon modeled market prices for the same or similar issues or the current rates available to the Company for debt with similar terms and remaining maturities. The aggregate estimated market value of short-term and long-term debt at March 31, 2013 was approximately $4.0 billion, compared with the aggregate carrying value of $3.6 billion. The aggregate estimated market value of short-term and long-term debt at December 31, 2012 was approximately $4.0 billion, compared with the aggregate carrying value of $3.6 billion.

10

MASCO CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Unaudited) (continued)

F. The Company is exposed to global market risk as part of its normal daily business activities. To manage these risks, the Company enters into various derivative contracts. These contracts include interest rate swap agreements, foreign currency exchange contracts and contracts intended to hedge the Company’s exposure to copper and zinc. The Company reviews its hedging program, derivative positions and overall risk management on a regular basis.

Interest Rate Swap Agreements. In March 2012, in connection with the issuance of $400 million of debt, the Company terminated the interest rate swap hedge relationships that it entered into in August 2011. These interest rate swaps were designated as cash flow hedges and effectively fixed interest rates on the forecasted debt issuance to variable rates based on 3-month LIBOR. Upon termination, the ineffective portion of the cash flow hedges of approximately $2 million loss was recognized in the Company’s consolidated statement of income in other, net. The remaining loss of approximately $23 million from the termination of these swaps is being amortized as an increase to interest expense over the remaining term of the debt, through March 2022. At March 31, 2013, the balance remaining in Accumulated Other Comprehensive Income was $21 million.

In the three months ended March 31, 2012, the Company recognized a net decrease in interest expense of $3 million resulting from the amortization of net gains related to the terminations (in 2012, 2008 and 2004) of the interest rate swap agreements.

Foreign Currency Contracts. The Company’s net cash inflows and outflows exposed to the risk of changes in foreign currency exchange rates arise from the sale of products in countries other than the manufacturing source, foreign currency denominated supplier payments, debt and other payables, and investments in subsidiaries. To mitigate this risk during 2013 and 2012, the Company, including certain European operations, entered into foreign currency forward contracts and foreign currency exchange contracts.

Gains (losses) related to foreign currency forward and exchange contracts are recorded in the Company’s condensed consolidated statements of operations in other income (expense), net. In the event that the counterparties fail to meet the terms of the foreign currency forward contracts, the Company’s exposure is limited to the aggregate foreign currency rate differential with such institutions.

Metal Contracts. During 2013 and 2012, the Company entered into several contracts to manage its exposure to increases in the price of copper and zinc. Gains (losses) related to these contracts are recorded in the Company’s condensed consolidated statements of operations in cost of sales.

The pre-tax gain (loss) included in the Company’s condensed consolidated statements of operations is as follows, in millions:

	Three Months Ended
	March 31,
	2013			2012
Foreign Currency Contracts
Exchange Contracts	$	7		$	(5	)
Forward Contracts		2			(1	)
Metal Contracts		(4	)		7
Total gain	$	5		$	1

11

MASCO CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Unaudited) (continued)

Note F – concluded:

The Company presents its derivatives, net by counterparty due to the right of offset under master netting arrangements in current assets or current liabilities in the condensed consolidated balance sheets. The notional amounts being hedged and the fair value of those derivative instruments, on a gross basis, are as follows, in millions:

	At March 31, 2013
	Notional
	Amount		Assets		Liabilities
Foreign Currency Contracts
Exchange Contracts	$	162
Current assets			$	4	$	1
Forward Contracts		68
Current assets				1		—
Metal Contracts		56
Current liabilities				—		4
Total			$	5	$	5

	At December 31, 2012
	Notional
	Amount		Assets		Liabilities
Foreign Currency Contracts
Exchange Contracts	$	172
Current liabilities			$	—	$	5
Forward Contracts		76
Current assets				1		1
Metal Contracts		35
Current liabilities				1		2
Total			$	2	$	8

The fair value of all metal and foreign currency derivative contracts is estimated on a recurring basis, quarterly, using Level 2 inputs (significant other observable inputs).

G. Changes in the Company’s warranty liability were as follows, in millions:

	Three Months Ended			Twelve Months Ended
	March 31, 2013			December 31, 2012
Balance at January 1	$	118		$	102
Accruals for warranties issued during the period		9			42
Accruals related to pre-existing warranties		1			16
Settlements made (in cash or kind) during the period		(10	)		(38	)
Other, net		—			(4	)
Balance at end of period	$	118		$	118

12

MASCO CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Unaudited) (continued)

H. On March 28, 2013, the Company entered into a credit agreement (the “New Credit Agreement”) with a bank group, with an aggregate commitment of $1.25 billion and a maturity date of March 28, 2018. Upon entry into the New Credit Agreement, the Company’s credit agreement dated as of June 21, 2010, as amended, with an aggregate commitment of $1.25 billion, was terminated.

The New Credit Agreement provides for an unsecured revolving credit facility available to the Company and one of its foreign subsidiaries, in U.S. dollars, European euros and certain other currencies. Borrowings under the revolver denominated in euros are limited to $500 million, equivalent. The Company can also borrow swingline loans up to $150 million and obtain letters of credit of up to $250 million; any outstanding Letters of Credit reduce the Company’s borrowing capacity. At March 31, 2013, the Company had $78 million of outstanding and unused Letters of Credit, reducing the Company’s borrowing capacity by such amount.

Revolving credit loans bear interest under the New Credit Agreement, at the Company’s option, at (A) a rate per annum equal to the greatest of (i) the prime rate, (ii) the Federal Funds effective rate plus 0.50% and (iii) LIBOR plus 1.0% (the “Alternative Base Rate”); plus an applicable margin based upon the then applicable corporate credit ratings of the Company; or (B) LIBOR plus an applicable margin based upon the then applicable corporate credit ratings of the Company. The foreign currency revolving credit loans bear interest at a rate equal to LIBOR plus an applicable margin based upon the then applicable corporate credit ratings of the Company.

The New Credit Agreement contains financial covenants requiring the Company to maintain (A) a maximum debt to total capitalization ratio, as adjusted for certain items, of 65 percent, and (B) a minimum interest coverage ratio, as adjusted for certain items, equal to or greater than 2.5 to 1.0. The debt to total capitalization ratio allows the add-back, if incurred, of up to the first $250 million of certain non-cash charges, including goodwill and other intangible asset impairment charges, occurring from and after January 1, 2012 that would negatively impact shareholders’ equity.

Based on the limitations of the debt to total capitalization ratio covenant in the New Credit Agreement, at March 31, 2013, the Company had additional borrowing capacity, subject to availability, of up to $858 million. Additionally, at March 31, 2013, the Company could absorb a reduction to shareholders’ equity of approximately $462 million and remain in compliance with the debt to total capitalization covenant.

In order for the Company to borrow under the New Credit Agreement, there must not be any default in the Company’s covenants in the New Credit Agreement (i.e., in addition to the two financial covenants, principally limitations on subsidiary debt, negative pledge restrictions, legal compliance requirements and maintenance of properties and insurance) and the Company’s representations and warranties in the New Credit Agreement must be true in all material respects on the date of borrowing (i.e., principally no material adverse change or litigation likely to result in a material adverse change, since December 31, 2012, in each case, no material ERISA or environmental non-compliance and no material tax deficiency). The Company was in compliance with all covenants and no borrowings have been made at March 31, 2013.

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MASCO CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Unaudited) (continued)

I. The Company’s 2005 Long Term Stock Incentive Plan (the “2005 Plan”) provides for the issuance of stock-based incentives in various forms to employees and non-employee Directors of the Company. At March 31, 2013, outstanding stock-based incentives were in the form of long-term stock awards, stock options, phantom stock awards and stock appreciation rights. Pre-tax compensation expense and the related income tax benefit for these stock-based incentives were as follows, in millions:

	Three Months Ended
	March 31,
	2013		2012
Long-term stock awards	$	9	$	8
Stock options		5		5
Phantom stock awards and stock appreciation rights		3		5
Total	$	17	$	18
Income tax benefit (37 percent tax rate - before valuation allowance)	$	6	$	7

Long-Term Stock Awards. Long-term stock awards are granted to key employees and non-employee Directors of the Company and do not cause net share dilution inasmuch as the Company continues the practice of repurchasing and retiring an equal number of shares in the open market. The Company granted 1,570,020 shares of long-term stock awards in the three months ended March 31, 2013.

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MASCO CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Unaudited) (continued)

Note I – continued:

The Company’s long-term stock award activity was as follows, shares in millions:

	Three Months Ended
	March 31,
	2013		2012
Unvested stock award shares at January 1		8		10
Weighted average grant date fair value	$	16	$	17
Stock award shares granted		2		1
Weighted average grant date fair value	$	20	$	12
Stock award shares vested		2		2
Weighted average grant date fair value	$	16	$	17
Stock award shares forfeited		—		—
Weighted average grant date fair value	$	18	$	18
Unvested stock award shares at March 31		8		9
Weighted average grant date fair value	$	17	$	16

At March 31, 2013 and 2012, there was $94 million and $103 million, respectively, of total unrecognized compensation expense related to unvested stock awards; such awards had a weighted average remaining vesting period of four years in both periods.

The total market value (at the vesting date) of stock award shares which vested during the three months ended March 31, 2013 and 2012 was $32 million and $23 million, respectively.

Stock Options. Stock options are granted to key employees of the Company. The exercise price equals the market price of the Company’s common stock at the grant date. These options generally become exercisable (vest ratably) over five years beginning on the first anniversary from the date of grant and expire no later than 10 years after the grant date.

The Company granted 869,000 of stock option shares in the three months ended March 31, 2013 with a grant date exercise price approximating $20 per share. In the first three months of 2013, 453,070 stock option shares were forfeited (including options that expired unexercised).

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MASCO CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Unaudited) (continued)

Note I – continued:

The Company’s stock option activity was as follows, shares in millions:

	Three Months Ended
	March 31,
	2013			2012
Option shares outstanding, January 1		30			36
Weighted average exercise price	$	21		$	21
Option shares granted		1			1
Weighted average exercise price	$	20		$	12
Option shares exercised		2			—
Aggregate intrinsic value on date of exercise (A)	$	17	million	$	1	million
Weighted average exercise price	$	11		$	8
Option shares forfeited		—			2
Weighted average exercise price	$	19		$	18
Option shares outstanding, March 31		29			35
Weighted average exercise price	$	22		$	21
Weighted average remaining option term (in years)		4			5
Option shares vested and expected to vest, March 31		29			35
Weighted average exercise price	$	22		$	21
Aggregate intrinsic value (A)	$	82	million	$	26	million
Weighted average remaining option term (in years)		4			5
Option shares exercisable (vested), March 31		23			25
Weighted average exercise price	$	24		$	23
Aggregate intrinsic value (A)	$	45	million	$	14	million
Weighted average remaining option term (in years)		4			4

(A) Aggregate intrinsic value is calculated using the Company’s stock price at each respective date, less the exercise price (grant date price) multiplied by the number of shares.

At March 31, 2013 and 2012, there was $17 million and $29 million, respectively, of unrecognized compensation expense (using the Black-Scholes option pricing model) related to unvested stock options; such options had a weighted average vesting period of two years and three years in 2013 and 2012, respectively.

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MASCO CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Unaudited) (continued)

Note I – concluded:

The weighted average grant date fair value of option shares granted in the period and the assumptions used to estimate those values using a Black-Scholes option pricing model were as follows:

	Three Months Ended
	March 31,
	2013			2012
Weighted average grant date fair value	$	8.33		$	4.44
Risk-free interest rate		1.20	%		1.10	%
Dividend yield		1.47	%		2.57	%
Volatility factor		49.00	%		51.00	%
Expected option life		6 years			6 years

J. Net periodic pension cost for the Company’s defined-benefit pension plans was as follows, in millions:

	Three Months ended March 31,
	2013					2012
	Qualified			Non-Qualified		Qualified			Non-Qualified
Service cost	$	1		$	—	$	2		$	—
Interest cost		10			1		10			1
Expected return on plan assets		(9	)		—		(8	)		—
Amortization of net loss		4			1		3			1
Net periodic pension cost	$	6		$	2	$	7		$	2

The Company participates in 20 regional multi-employer pension plans, principally related to building trades; none of the plans are considered significant to the Company.

Effective January 1, 2010, the Company froze all future benefit accruals under substantially all of the Company’s domestic qualified and non-qualified defined benefit pension plans. Future benefit accruals related to the Company’s foreign non-qualified plans were frozen several years ago.

K. The reclassifications from accumulated other comprehensive income (loss) to the income statement were as follows, in millions:

	Amount
Accumulated Other Comprehensive Income (Loss)	Reclassified
	March 31,
	2013		2012		Income Statement Line Item
Amortization of defined benefit pension:
Actuarial losses, net	$	5	$	4	Selling, General & Administrative Expense
		—		—	Tax expense
	$	5	$	4	Net of tax
Interest rate swaps	$	—	$	—	Interest expense

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MASCO CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Unaudited) (continued)

L. Information about the Company by segment and geographic area was as follows, in millions:

	Three Months Ended March 31,
	2013		2012		2013			2012
	Net Sales(A)				Operating Profit (Loss)
The Company’s operations by segment were:
Cabinets and Related Products	$	236	$	228	$	(4	)	$	(16	)
Plumbing Products		762		742		86			97
Installation and Other Services		312		278		(4	)		(14	)
Decorative Architectural Products		432		434		89			73
Other Specialty Products		134		124		(1	)		(5	)
Total	$	1,876	$	1,806	$	166		$	135
The Company’s operations by geographic area were:
North America	$	1,510	$	1,431	$	140		$	88
International, principally Europe		366		375		26			47
Total	$	1,876	$	1,806		166			135
General corporate expense, net						(34	)		(28	)
Income from litigation settlements						—			2
Operating profit, as reported						132			109
Other income (expense), net						(53	)		(49	)
Income from continuing operations before income taxes					$	79		$	60

(A) Inter-segment sales were not material.

M. Other, net, which is included in other income (expense), net, was as follows, in millions:

	Three Months Ended
	March 31,
	2013		2012
Income from cash and cash investments	$	1	$	2
Income from financial investments (Note E)		3		16
Other items, net		3		(3	)
Total other, net	$	7	$	15

Other items, net, included $3 million and $(1) million of currency gains (losses) for the three months ended March 31, 2013 and 2012, respectively.

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MASCO CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Unaudited) (continued)

N. Reconciliations of the numerators and denominators used in the computations of basic and diluted earnings per common share were as follows, in millions:

	Three Months Ended
	March 31,
	2013			2012
Numerator (basic and diluted):
Income from continuing operations	$	56		$	42
Allocation to unvested restricted stock awards		(1	)		(1	)
Income from continuing operations attributable to common shareholders	$	55		$	41
Loss from discontinued operations, net		(9	)		(9	)
Net income available to common shareholders	$	46		$	32
Denominator:
Basic common shares (based upon weighted average)		350			349
Add:
Contingent common shares		—			—
Stock option dilution		2			1
Diluted common shares		352			350

For the three months ended March 31, 2013 and 2012, the Company allocated dividends to the unvested restricted stock awards (participating securities).

Additionally, 15 million and 30 million common shares for the three months ended March 31, 2013 and 2012, respectively, related to stock options were excluded from the computation of diluted earnings per common share due to their antidilutive effect.

In the first three months of 2013, the Company granted 1.6 million shares of long-term stock awards. To offset the dilutive impact of these awards and awards granted in late 2012, the Company repurchased and retired 1.7 million shares of Company common stock, for cash aggregating approximately $35 million. At March 31, 2013, the Company had 22.6 million shares of its common stock remaining under the July 2007 Board of Directors’ repurchase authorization.

On the basis of amounts paid (declared), cash dividends per common share were $.075 ($.075) and $.075 ($.075), respectively, for the three months ended March 31, 2013 and 2012.

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MASCO CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Unaudited) (concluded)

O. We are subject to claims, charges, litigation and other proceedings in the ordinary course of our business, including those arising from or related to contractual matters, intellectual property, personal injury, environmental matters, product liability, product recalls, construction defect, insurance coverage, personnel and employment disputes and other matters, including class actions. We believe we have adequate defenses in these matters and that the outcome of these matters is not likely to have a material adverse effect on us. However, there is no assurance that we will prevail in these matters, and we could in the future incur judgments, enter into settlements of claims or revise our expectations regarding the outcome of these matters, which could materially impact our results of operations.

P. The effective tax rate in the first quarter of 2013 was 18 percent primarily due to a decrease in the valuation allowance resulting from the partial utilization of our U.S. Federal net operating loss carryforward and from a $12 million state income tax benefit on uncertain tax positions due to the expiration of applicable statutes of limitations in various jurisdictions.

As a result of tax audit closings, settlements and expiration of applicable statutes of limitations in various jurisdictions within the next 12 months, the Company anticipates that it is reasonably possible that the liability for uncertain tax positions could be reduced by approximately $3 million.

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MASCO CORPORATION

Item 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

FIRST QUARTER 2013 VERSUS FIRST QUARTER 2012

SALES AND OPERATIONS

The following table sets forth our net sales and operating profit (loss) margins by business segment and geographic area, dollars in millions:

	Three Months Ended				Percent (Decrease)
	March 31,				Increase
	2013		2012		2013 vs. 2012
Net Sales:
Cabinets and Related Products	$	236	$	228		4	%
Plumbing Products		762		742		3	%
Installation and Other Services		312		278		12	%
Decorative Architectural Products		432		434		—	%
Other Specialty Products		134		124		8	%
Total	$	1,876	$	1,806		4	%
North America	$	1,510	$	1,431		6	%
International, principally Europe		366		375		(2	%)
Total	$	1,876	$	1,806		4	%

	Three Months Ended
	March 31,
	2013			2012
Operating Profit (Loss) Margins: (A)
Cabinets and Related Products		(1.7	%)		(7.0	%)
Plumbing Products		11.3	%		13.1	%
Installation and Other Services		(1.3	%)		(5.0	%)
Decorative Architectural Products		20.6	%		16.8	%
Other Specialty Products		(0.7	%)		(4.0	%)
North America		9.3	%		6.1	%
International, principally Europe		7.1	%		12.5	%
Total		8.8	%		7.5	%
Operating profit margins, as reported		7.0	%		6.0	%

(A) Before general corporate expense, net and income from litigation settlements; see Note L to the condensed consolidated financial statements.

We report our financial results in accordance with generally accepted accounting principles (“GAAP”) in the United States. However, we believe that certain non-GAAP performance measures and ratios used in managing the business may provide users of this financial information with additional meaningful comparisons between current results and results in prior periods. Non-GAAP performance measures and ratios should be viewed in addition to, and not as an alternative for, our reported results.

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MASCO CORPORATION

Item 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

NET SALES

Net sales increased four percent for the three-month period ended March 31, 2013 from the comparable period of 2012. There was no net impact of currency translation in the first quarter of 2013. The following table reconciles reported net sales to net sales, excluding acquisitions and the effect of currency translation, in millions:

	Three Months Ended
	March 31,
	2013			2012
Net sales, as reported	$	1,876		$	1,806
Acquisitions		(3	)		—
Net sales, excluding acquisitions		1,873			1,806
Currency translation		—			—
Net sales, excluding acquisitions and the effect of currency translation	$	1,873		$	1,806

North American net sales increased six percent for the three-month period ended March 31, 2013 from the comparable period of 2012 due to increased sales volume of cabinets, installation and other services, plumbing products and windows. Net sales were also positively affected by selling price increases, which increased sales by two percent for the three-month period ended March 31, 2013 from the comparable period of 2012. Such increases were partially offset by a less favorable product mix related to cabinets and plumbing products, as well as lower sales volume of paints and stains which decreased sales by one percent for the three-month period ended March 31, 2013 from the comparable period of 2012.

In local currencies and in U.S. dollars, net sales from International operations decreased two percent for the three-month period ended March 31, 2013. The decrease in local currency sales in the three-month period ended March 31, 2013 is primarily due to lower sales volume of International plumbing products, cabinets and windows, partially offset by increased selling prices.

Net sales of Cabinets and Related Products increased for the three-month period ended March 31, 2013 due to increased sales volume and selling prices of North American cabinets, which increased sales by 11 percent from the comparable period of 2012, partially offset by a less favorable product mix of North American cabinets, which decreased sales by seven percent from the comparable period of 2012.

Net sales of Plumbing Products increased due to increased sales volume of North American operations, which increased sales by four percent for the three-month period ended March 31, 2013 from the comparable period of 2012, partially offset by lower sales volume of international operations.

Net sales of Installation and Other Services increased for the three-month period ended March 31, 2013, primarily due to increased sales volume related to a higher level of activity in the new home construction market as well as increased selling prices.

Net sales of Decorative Architectural Products decreased for the three-month period ended March 31, 2013, principally due to lower sales volume of paints and stains.

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MASCO CORPORATION

Item 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Net sales of Other Specialty Products increased for the three-month period ended March 31, 2013 compared with the same period in 2012 due to higher sales volume of North American windows. This segment was negatively affected by lower sales volume of U.K. windows and staple guns and other fastening tools in the same period of 2013 compared to 2012.

OPERATING MARGINS

Our gross profit margins were 27.1 percent for the three-month period ended March 31, 2013 compared with 26.8 percent for the comparable period of 2012. Selling, general and administrative expenses, as a percentage of sales, were 20.0 percent for the three-month period ended March 31, 2013, compared to 20.8 percent for the comparable period of 2012.

Gross profit margins for the first quarter ended March 31, 2013 were positively affected by increased sales volume and a more favorable relationship between selling prices and commodity costs. The decrease in selling, general and administrative expenses as a percent of sales, in the first quarter of 2013 is due to increased sales volume.

We have been focused on the strategic rationalization of our businesses, including business consolidations, plant closures, headcount reductions, system implementations and other initiatives. Operating profit for the three-month periods ended March 31, 2013 and 2012 includes $8 million and $11 million, respectively, of costs and charges related to our business rationalizations and other initiatives.

Operating margins in the Cabinets and Related Products segment for the three-month period ended March 31, 2013 reflect a more favorable relationship between selling prices and commodity costs and the benefits associated with our business rationalizations and cost savings initiatives, partially offset by a less favorable product mix.

Operating margins in the Plumbing Products segment for the three-month period ended March 31, 2013 were negatively impacted by lower sales volume and a less favorable product mix related to international operations and a less favorable relationship between selling prices and commodity costs (including the negative impact of $4 million loss related to the metal hedge contracts). Such declines more than offset increased North American sales volume.

Operating margins in the Installation and Other Services segment for the three-month period ended March 31, 2013 were positively impacted by increased sales volume and the related absorption of fixed costs, as well as the benefits associated with business rationalizations and other cost savings initiatives.

Operating margins in the Decorative Architectural Products segment for the three-month period ended March 31, 2013 reflect the anniversary of pricing actions and lower program costs.

Operating margins in the Other Specialty Products segment for the three-month period ended March 31, 2013 reflect increased sales volume and the benefits associated with business rationalizations and other cost savings initiatives.

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MASCO CORPORATION

Item 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

OTHER INCOME (EXPENSE), NET

Interest expense for the three-month period ended March 31, 2013 decreased $4 million from the comparable period of 2012 primarily due to the repurchase and retirement of $791 million of 5.875% Notes in 2012, partially offset by the issuance of 5.95% Notes. This activity resulted in a net debt reduction of $400 million in 2012.

Other items, net, for the three-month period ended March 31, 2013 included $3 million of currency transaction gains. Other items, net, for the three-month period ended March 31, 2012 included $(1) million of currency transaction losses.

Other, net, for the three-month period ended March 31, 2013 included gains of $3 million related to distributions from private equity funds. Other, net, for the three-month period ended March 31, 2012 included gains of $16 million related to distributions from private equity funds.

INCOME PER COMMON SHARE FROM CONTINUING OPERATIONS – Attributable to Masco Corporation

Income for the three-month period ended March 31, 2013 was $56 million compared with $42 million for the comparable period of 2012. Diluted earnings per common share for the three-month period ended March 31, 2013 was $.16 per common share compared with $.12 per common share for the comparable period of 2012.

Our effective tax rate in the first quarter of 2013 of 18 percent was lower than our normalized tax rate of 36 percent primarily due to a decrease in the valuation allowance resulting from the partial utilization of our U.S. Federal net operating loss carryforward and from a $12 million state income tax benefit on uncertain tax positions due to the expiration of applicable statutes of limitations in various jurisdictions.

In the first quarter of 2012, we incurred income tax expense of $7 million on pre-tax income from continuing operations of $60 million. The income tax expense includes a $21 million state income tax benefit on uncertain tax positions primarily from the expiration of applicable statutes of limitations in various jurisdictions and certain tax audit closings.

OTHER FINANCIAL INFORMATION

Our current ratio was 1.7 to 1 at both March 31, 2013 and December 31, 2012.

For the three months ended March 31, 2013, cash of $210 million was used for operating activities. First quarter 2013 cash from operations was affected by an expected and annually recurring seasonal first quarter increase in accounts receivable and inventories compared with December 31, 2012.

Net cash used for financing activities was $65 million, primarily due to $26 million for the payment of cash dividends and $35 million for the acquisition of Company common stock in open-market transactions to partially offset the dilutive impact of long-term stock awards granted in 2013 and awards granted in late 2012. Net cash used for investing activities was $30 million and included $31 million for capital expenditures and $5 million for the acquisition of a U.K. door company, offset by net proceeds from the sale of fixed assets and financial investments of $10 million.

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MASCO CORPORATION

Item 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Our cash and cash investments were $1.0 billion and $1.4 billion at March 31, 2013 and December 31, 2012, respectively. Our cash and cash investments consist of overnight interest bearing money market demand and time deposit accounts, money market mutual funds and government securities.

Of the $1.0 billion and the $1.4 billion of cash and cash investments held at March 31, 2013 and December 31, 2012, respectively, $522 million and $572 million, respectively, is held in foreign subsidiaries. If these funds were needed for our operations in the U.S., their repatriation into the U.S. may result in additional U.S. income taxes or foreign withholding taxes. The amount of such taxes is dependent on the income tax laws and circumstances at the time of distribution.

On March 28, 2013, the Company entered into a credit agreement (the “New Credit Agreement”) with a bank group, with an aggregate commitment of $1.25 billion and a maturity date of March 28, 2018. Upon entry into the New Credit Agreement, the Company’s credit agreement dated as of June 21, 2010, as amended, with an aggregate commitment of $1.25 billion, was terminated. See Footnote H to the financial statements.

Based on the limitations of the debt to total capitalization covenant in the New Credit Agreement, at March 31, 2013, the Company had additional borrowing capacity, subject to availability, of up to $858 million. Additionally, at March 31, 2013, the Company could absorb a reduction to shareholders’ equity of approximately $462 million and remain in compliance with the debt to total capitalization covenant.

We were in compliance with all covenants and had no borrowings under the New Credit Agreement at March 31, 2013.

We have $200 million of 7.125% Notes due August 15, 2013 (“Notes”). We plan to use available cash to retire the Notes.

We believe that our present cash balance, cash flows from operations and, to the extent necessary, bank borrowings and future financial market activities, are sufficient to fund our working capital and other investment needs.

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MASCO CORPORATION

Item 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

OUTLOOK FOR THE COMPANY

We continue to make progress on our strategic initiatives, which include leveraging our brands, reducing our costs, improving our Installation and Cabinets segments and strengthening our balance sheet. We are encouraged by the continued strength in new home construction activity, driven by the stabilization and improvement of home prices in many areas of the U.S., increasing affordability and demographics. These factors should continue to drive demand for new homes over the next several years. Increased new home construction activity benefits virtually all of our businesses.

We believe and are confident that the long-term fundamentals for the new home construction and home improvement markets continue to be positive. We believe that our strong financial position, together with our current strategy of investing in leadership brands, including KRAFTMAID and MERILLAT cabinets, DELTA and HANSGROHE faucets, BEHR paint and MILGARD windows, our continued focus on innovation and our commitment to lean principles, will allow us to drive long-term growth and create value for our shareholders.

FORWARD-LOOKING STATEMENTS

Statements contained in this report that reflect our views about our future performance constitute “forward-looking statements” under the Private Securities Litigation Reform Act of 1995. Forward-looking statements can be identified by words such as “believe,” “anticipate,” “appear,” “may,” “will,” “intend,” “plan,” “estimate,” “expect,” “assume,” “seek,” “should,” “forecast,” and similar references to future periods. These views involve risks and uncertainties that are difficult to predict and, accordingly, our actual results may differ materially from the results discussed in our forward-looking statements. We caution you against relying on any of these forward-looking statements. Our future performance may be affected by our reliance on new home construction and home improvement, our reliance on key customers, the cost and availability of raw materials, the uncertainty in the international economy, shifts in consumer preferences and purchasing practices, our ability to improve our underperforming businesses and our ability to maintain our competitive positions in our industries. These and other factors are discussed in detail in Item 1A, “Risk Factors” in our most recent Annual Report on Form 10-K. Our forward-looking statements in this report speak only as of the date of this report. Factors or events that could cause our actual results to differ may emerge from time to time, and it is not possible for us to predict all of them. Unless required by law, we undertake no obligation to update publicly any forward-looking statements as a result of new information, future events or otherwise.

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MASCO CORPORATION

Item 4. CONTROLS AND PROCEDURES

a. Evaluation of Disclosure Controls and Procedures.

The Company’s principal executive officer and principal financial officer have concluded, based on an evaluation of the Company’s disclosure controls and procedures (as defined in the Securities Exchange Act of 1934 Rules 13a-15(e) or 15d-15(e)) as required by paragraph (b) of Exchange Act Rules 13a-15 or 15d-15 that, as of March 31, 2013, the Company’s disclosure controls and procedures were effective.

b. Changes in Internal Control over Financial Reporting.

In connection with the evaluation of the Company’s “internal control over financial reporting” that occurred during the quarter ended March 31, 2013, which is required under the Securities Exchange Act of 1934 by paragraph (d) of Exchange Rules 13a-15 or 15d-15 (as defined in paragraph (f) of Rule 13a-15), management determined that there was no change that materially affected or is reasonably likely to materially affect internal control over financial reporting.

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MASCO CORPORATION

PART II. OTHER INFORMATION

Item 1. Legal Proceedings

Information regarding legal proceedings involving us is set forth in Note O to our condensed consolidated financial statements included in Part I, Item 1 of this Report and is incorporated herein by reference.

Item 1A. Risk Factors

There have been no material changes to the risk factors of the Company set forth in Item 1A, “Risk Factors” in the Company’s Annual Report on Form 10-K for the year ended December 31, 2012.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

The following table provides information regarding the repurchase of Company common stock for the three months ended March 31, 2013:

Period	Total Number of Shares Purchased		Average Price Paid Per Common Share		Total Number of Shares  Purchased as Part of Publicly Announced Plans or Programs (a)		Maximum Number of Shares That May Yet Be Purchased Under the Plans or Programs
1/1/13- 1/31/13		—	$	—		—		24,348,790
2/1/13- 2/29/13		—	$	—		—		24,348,790
3/1/13- 3/31/13		1,732,810	$	20.14		1,732,810		22,615,980
Total for the quarter		1,732,810	$	20.14		1,732,810		22,615,980

(a) In July 2007, our Board of Directors authorized the purchase of up to 50 million shares of our common stock in open-market transactions or otherwise.

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MASCO CORPORATION

PART II. OTHER INFORMATION (continued)

Item 6. Exhibits

10	-	Credit Agreement dated as of March 28, 2013 among Masco Corporation and Masco Europe S.à.r.l., as borrowers, the Lenders party thereto, JPMorgan Chase Bank, N.A., as Administrative Agent, Citibank, N.A., as Syndication Agent, and Royal Bank of Canada, Deutsche Bank Securities Inc., PNC Bank, National Association, and SunTrust Bank, as Co-Documentation Agents. Incorporated by reference to Exhibit 10 to the Registrant’s Current Report on Form 8-K dated March 28, 2013 and filed on April 3, 2013.
12	-	Computation of Ratio of Earnings to Combined Fixed Charges and Preferred Stock Dividends
31a	-	Certification by Chief Executive Officer Required by Rule 13a- 14(a) or 15d-14(a) of the Securities Exchange Act of 1934
31b	-	Certification by Chief Financial Officer Required by Rule 13a- 14(a) or 15d-14(a) of the Securities Exchange Act of 1934
32	-	Certification Required by Rule 13a-14(b) or 15d-14(b) of the Securities Exchange Act of 1934 and Section 1350 of Chapter 63 of Title 18 of the United States Code
101	-	Interactive Data File

29

MASCO CORPORATION

PART II. OTHER INFORMATION, concluded

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

MASCO CORPORATION
By:	/s/ John G. Sznewajs
Name:	John G. Sznewajs
Title:	Vice President, Treasurer and Chief Financial Officer

May 2, 2013

30

MASCO CORPORATION

EXHIBIT INDEX

Exhibit
Exhibit 10	Credit Agreement dated as of March 28, 2013 among Masco Corporation and Masco Europe S.à.r.l., as borrowers, the Lenders party thereto, JPMorgan Chase Bank, N.A., as Administrative Agent, Citibank, N.A., as Syndication Agent, and Royal Bank of Canada, Deutsche Bank Securities Inc., PNC Bank, National Association, and SunTrust Bank, as Co-Documentation Agents. Incorporated by reference to Exhibit 10 to the Registrant’s Current Report on Form 8-K dated March 28, 2013 and filed on April 3, 2013.
Exhibit 12	Computation of Ratio of Earnings to Combined Fixed Charges and Preferred Stock Dividends
Exhibit 31a	Certification by Chief Executive Officer Required by Rule 13a-14(a) or 15d-14(a) of the Securities Exchange Act of 1934
Exhibit 31b	Certification by Chief Financial Officer Required by Rule 13a-14(a) or 15d-14(a) of the Securities Exchange Act of 1934
Exhibit 32	Certification Required by Rule 13a-14(b) or 15d-14(b) of the Securities Exchange Act of 1934 and Section 1350 of Chapter 63 of Title 18 of the United States Code
Exhibit 101	Interactive Data File

EX-12

Exhibit 12

MASCO CORPORATION

Computation of Ratio of Earnings to Combined Fixed Charges and Preferred Stock Dividends

	(Dollars in Millions)
	Three
	Months
	Ended
	Mar. 31,			Year Ended December 31,
	2013			2012		2011			2010			2009			2008
Earnings Before Income Taxes, Preferred Stock Dividends and Fixed Charges:
Income (loss) from continuing operations before income taxes	$	79		$	73	$	(392	)	$	(745	)	$	(151	)	$	(145	)
Deduct equity in undistributed loss (earnings) of fifty-percent-or- less-owned companies		(1	)		—		—			—			—			(1	)
Add interest on indebtedness, net		59			249		250			249			224			228
Add amortization of debt expense		2			7		7			7			5			4
Add estimated interest factor for rentals		8			31		33			36			44			51
Earnings (loss) before income taxes, noncontrolling interest, net, fixed charges and preferred stock dividends	$	147		$	360	$	(102	)	$	(453	)	$	122		$	137
Fixed Charges:
Interest on indebtedness	$	58		$	248	$	249		$	246		$	221		$	228
Amortization of debt expense		2			7		7			7			5			4
Estimated interest factor for rentals		8			31		33			36			44			51
Total fixed charges	$	68		$	286	$	289		$	289		$	270		$	283
Preferred stock dividends(a)	$	—		$	—	$	—		$	—		$	—		$	—
Combined fixed charges and preferred stock dividends	$	68		$	286	$	289		$	289		$	270		$	283
Ratio of earnings to fixed charges		2.2			1.3		(0.4	)		(1.6	)		0.5			0.5
Ratio of earnings to combined fixed charges and preferred stock dividends		2.2			1.3		(0.4	)		(1.6	)		0.5			0.5
Ratio of earnings to combined fixed charges and preferred stock dividends excluding certain items (b)		2.2			1.7		1.2			1.0			1.5			2.2

(a) Represents amount of income before provision for income taxes required to meet the preferred stock dividend requirements of the Company.

(b) Excludes the 2012 non-cash, pre-tax impairment charge for other intangible assets of $42 million and litigation expense of $77 million; the 2011 non-cash, pre-tax impairment charge for goodwill and other intangible assets of $450 million and litigation expense of $9 million; the 2010 non-cash, pre-tax impairment charge for goodwill and other intangible assets of $698 million and non-cash, pre-tax impairment charges for financial investments of $34 million; the 2009 non-cash, pre-tax charge for goodwill impairment of $262 million; non-cash, pre-tax impairment charge for financial investments of $10 million and litigation expense of $7 million; and the 2008 non-cash, pre-tax impairment charge for goodwill and other intangible assets of $415 million, financial investments of $58 million and litigation expense of $9 million.

EX-31.A

Exhibit 31a

MASCO CORPORATION

Certification Required by Rule 13a-14(a) or 15d-14(a)

of the Securities Exchange Act of 1934

I, Timothy Wadhams, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Masco Corporation (the Registrant);

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures as of the end of the period covered by this report based on such evaluation; and

d) disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: May 2, 2013	By:	/s/ Timothy Wadhams
		Timothy Wadhams
		President and Chief Executive Officer

EX-31.B

Exhibit 31b

MASCO CORPORATION

Certification Required by Rule 13a-14(a) or 15d-14(a)

of the Securities Exchange Act of 1934

I, John G. Sznewajs, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Masco Corporation (the Registrant);

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures as of the end of the period covered by this report based on such evaluation; and

d) disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: May 2, 2013	By:	/s/ John G. Sznewajs
		John G. Sznewajs
		Vice President, Treasurer and     Chief Financial Officer

EX-32

Exhibit 32

MASCO CORPORATION

Certification Required by Rule 13a-14(b) or 15d-14(b)

of the Securities Exchange Act of 1934 and

Section 1350 of Chapter 63 of Title 18 of the

United States Code

The certification set forth below is being submitted in connection with the Masco Corporation Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2013 (the “Report”) for the purpose of complying with Rule 13a-14(b) or Rule 15d-14(b) of the Securities Exchange Act of 1934 (the “Exchange Act”) and Section 1350 of Chapter 63 of Title 18 of the United States Code.

Timothy Wadhams, the President and Chief Executive Officer, and John G. Sznewajs, the Vice President, Treasurer and Chief Financial Officer, of Masco Corporation, each certifies that, to the best of his knowledge:

1. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2. The information contained in the Report fairly presents, in all material respects, the consolidated financial condition and results of operations of Masco Corporation.

Date: May 2, 2013	/s/ Timothy Wadhams
	Name:	Timothy Wadhams
	Title:	President and     Chief Executive Officer
Date: May 2, 2013	/s/ John G. Sznewajs
	Name:	John G. Sznewajs
	Title:	Vice President, Treasurer and     Chief Financial Officer

XML

Discontinued Operations - Balance Sheet Items Reclassified as Held for Sale (Detail) (Held For Sale [Member], USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Held For Sale [Member]
Balance Sheet Components [Line Items]
Receivables	$ 32	$ 32
Inventories	64	66
Prepaid expenses and other	2	2
Property and equipment, net	88	103
Total assets	186	203
Accounts payable	31	31
Accrued liabilities	12	14
Deferred income taxes		4
Total liabilities	$ 43	$ 49

XML

Stock-Based Compensation - Pre-Tax Compensation Expense and Related Income Tax Benefit for Stock-Based Incentives (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Long-term stock awards	$ 9	$ 8
Stock options	5	5
Phantom stock awards and stock appreciation rights	3	5
Total	17	18
Income tax benefit (37 percent tax rate - before valuation allowance)	$ 6	$ 7

XML

Fair Value of Financial Investments and Liabilities - Additional Information (Detail) (USD $) In Billions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Fair Value Disclosures [Abstract]
Estimated market value of long-term and short-term debt	$ 4.0	$ 4.0
Aggregate carrying value of long-term and short-term debt	$ 3.6	$ 3.6

XML

Stock-Based Compensation - Pre-Tax Compensation Expense and Related Income Tax Benefit for Stock-Based Incentives (Parenthetical) (Detail)	3 Months Ended
	Mar. 31, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Tax rate - before valuation allowance	37.00%

XML

Fair Value of Financial Investments and Liabilities - Changes in Level 3 Financial Assets Measured at Fair Value on Recurring Basis (Detail) (Auction Rate Securities [Member], USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
Auction Rate Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value at beginning of period	$ 22	$ 22
Total losses included in earnings
Unrealized (losses)
Purchases
Settlements
Transfer from Level 3 to Level 2
Fair value at period end	$ 22	$ 22

XML

Accumulated Other Comprehensive Income (loss) (Tables)

3 Months Ended

Mar. 31, 2013

Equity [Abstract]

Reclassifications from Accumulated Other Comprehensive Income (Loss) to Income Statement

The reclassifications from accumulated other comprehensive income (loss) to the income statement were as follows, in millions:

	Amount
Accumulated Other Comprehensive Income (Loss)	Reclassified
	March 31,
	2013		2012		Income Statement Line Item
Amortization of defined benefit pension:
Actuarial losses, net	$	5	$	4	Selling, General & Administrative Expense
		—		—	Tax expense
	$	5	$	4	Net of tax
Interest rate swaps	$	—	$	—	Interest expense

XML

Stock-Based Compensation - Company's Long-Term Stock Award Activity (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Unvested stock award shares	8	10
Weighted average grant date fair value	$ 16	$ 17
Stock award shares granted	2	1
Weighted average grant date fair value	$ 20	$ 12
Stock award shares vested	2	2
Weighted average grant date fair value	$ 16	$ 17
Stock award shares forfeited
Weighted average grant date fair value	$ 18	$ 18
Unvested stock award shares	8	9
Weighted average grant date fair value	$ 17	$ 16

XML

Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2013

Accounting Policies [Abstract]

Recently Issued Accounting Pronouncements

Recently Issued Accounting Pronouncements. On January 1, 2013, the Company adopted new accounting guidance requiring disclosure of amounts reclassified from accumulated other comprehensive income. The adoption of this new guidance did not have an impact on the Company’s financial position or its results of operations.

XML

Derivative Instruments and Hedging Activities - Pre-Tax Gain (Loss) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Derivative [Line Items]
Total gain	$ 5	$ 1
Exchange Contracts [Member]
Derivative [Line Items]
Total gain	7	(5)
Forward Contracts [Member]
Derivative [Line Items]
Total gain	2	(1)
Metals Contracts [Member]
Derivative [Line Items]
Total gain	$ (4)	$ 7

XML

Depreciation and Amortization Expense - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Property Plant And Equipment [Abstract]
Depreciation and amortization expense, including discontinued operations	$ 49	$ 55
Accelerated depreciation	$ 4	$ 7

XML

Discontinued Operations - Financial Information for Discontinued Operations (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Discontinued Operations And Disposal Groups [Abstract]
Net Sales	$ 59	$ 89
Operating loss from discontinued operations	(3)	(11)
Impairment of assets	(10)
Loss on disposal of discontinued operations, net		(1)
Loss before income tax	(13)	(12)
Income tax benefit	(4)	(3)
Loss from discontinued operations	$ (9)	$ (9)

XML

Warranty - Changes in Warranty Liability (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
Warrant Liability [Abstract]
Balance at beginning of period	$ 118	$ 102
Accruals for warranties issued during the period	9	42
Accruals related to pre-existing warranties	1	16
Settlements made (in cash or kind) during the period	(10)	(38)
Other, net		(4)
Balance at end of period	$ 118	$ 118

XML

Earnings Per Common Share - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive effect on computation of diluted earnings per common share	15,000,000	30,000,000
Grant of long term stock awards	1,000,000	1,000,000
Repurchase and retirement of common stock to offset the dilutive impact of long term stock awards	1,700,000
Repurchase and retirement of common stock cash aggregate to offset the dilutive effect	$ 35
Common stock outstanding under repurchase authorization	22,600,000
Cash dividends per common share paid	$ 0.075	$ 0.075
Cash dividends per common share declared	$ 0.075	$ 0.075
Long-Term Stock Awards [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Grant of long term stock awards	1,600,000

XML

Employee Retirement Plans - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2013 MultiEmployerPensionPlan
Compensation And Retirement Disclosure [Abstract]
Description of Multiemployer Plan	The Company participates in 20 regional multi-employer pension plans, principally related to building trades; none of the plans are considered significant
Number of regional multi employer pension plan	20

XML

Fair Value of Financial Investments and Liabilities - Income from Financial Investments Net, Included in Other, Net, Within Other Income (Expense), Net (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Schedule of Investments [Line Items]
Total income from financial investments	$ 3	$ 16
Private Equity Funds [Member]
Schedule of Investments [Line Items]
Realized gains	$ 3	$ 16

XML

Accounting Policies

3 Months Ended

Mar. 31, 2013

Accounting Policies [Abstract]

Accounting Policies

A. In the opinion of the Company, the accompanying unaudited condensed consolidated financial statements contain all adjustments, of a normal recurring nature, necessary to present fairly its financial position as at March 31, 2013 and the results of operations and cash flows for the three months ended March 31, 2013 and 2012. The condensed consolidated balance sheet at December 31, 2012 was derived from audited financial statements.

Certain prior-year amounts have been reclassified to conform to the 2013 presentation in the condensed consolidated financial statements. In the Company’s condensed consolidated balance sheets, assets and liabilities related to the 2013 discontinued operations have been separately presented at March 31, 2013 and December 31, 2012. The results of operations related to the 2013 discontinued operations have been separately stated in the accompanying condensed consolidated statements of operations for the three months ended March 31, 2013 and 2012. In the Company’s condensed consolidated statements of cash flows for the three months ended March 31, 2013 and 2012, cash flows from discontinued operations are not separately classified.

Recently Issued Accounting Pronouncements. On January 1, 2013, the Company adopted new accounting guidance requiring disclosure of amounts reclassified from accumulated other comprehensive income. The adoption of this new guidance did not have an impact on the Company’s financial position or its results of operations.

XML

Accumulated Other Comprehensive Income (loss) - Reclassifications from Accumulated Other Comprehensive Income (Loss) to Income Statement (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Mar. 31, 2012
Amortization of defined benefit pension:
Accumulated other comprehensive income, defined benefit pension net of tax	$ 5	$ 4
Selling, General & Administrative Expense [Member]
Amortization of defined benefit pension:
Accumulated other comprehensive income, defined benefit pension, before tax	5	4
Tax expense [Member]
Amortization of defined benefit pension:
Accumulated other comprehensive income, defined benefit pension, tax
Interest expense [Member]
Amortization of defined benefit pension:
Interest rate swaps

XML

Fair Value of Financial Investments and Liabilities - Financial Investments Included in Other Assets (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, fair value disclosure	$ 93	$ 95
Recurring Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, fair value disclosure	22	22
Recurring Investments [Member] | Auction Rate Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, fair value disclosure	22	22
Non-Recurring Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, fair value disclosure	71	73
Non-Recurring Investments [Member] | Private Equity Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, fair value disclosure	67	69
Non-Recurring Investments [Member] | Other Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, fair value disclosure	$ 4	$ 4

XML

Derivative Instruments and Hedging Activities (Tables)

3 Months Ended

Mar. 31, 2013

Derivative Instruments And Hedging Activities Disclosure [Abstract]

Pre-Tax Gain (Loss)

The pre-tax gain (loss) included in the Company’s condensed consolidated statements of operations is as follows, in millions:

	Three Months Ended
	March 31,
	2013			2012
Foreign Currency Contracts
Exchange Contracts	$	7		$	(5	)
Forward Contracts		2			(1	)
Metal Contracts		(4	)		7
Total gain	$	5		$	1

Fair Value of Derivative Instruments Presented on Gross Basis

The notional amounts being hedged and the fair value of those derivative instruments, on a gross basis, are as follows, in millions:

	At March 31, 2013
	Notional
	Amount		Assets		Liabilities
Foreign Currency Contracts
Exchange Contracts	$	162
Current assets			$	4	$	1
Forward Contracts		68
Current assets				1		—
Metal Contracts		56
Current liabilities				—		4
Total			$	5	$	5

	At December 31, 2012
	Notional
	Amount		Assets		Liabilities
Foreign Currency Contracts
Exchange Contracts	$	172
Current liabilities			$	—	$	5
Forward Contracts		76
Current assets				1		1
Metal Contracts		35
Current liabilities				1		2
Total			$	2	$	8

XML

Fair Value of Financial Investments and Liabilities (Tables)

3 Months Ended

Mar. 31, 2013

Fair Value Disclosures [Abstract]

Financial Investments Included in Other Assets

Financial investments included in other assets were as follows, in millions:

	March 31, 2013		December 31, 2012
Auction rate securities	$	22	$	22
Total recurring investments		22		22
Private equity funds		67		69
Other investments		4		4
Total non-recurring investments		71		73
Total	$	93	$	95

Company's Investments in Available-for-Sale Securities

The Company’s investments in available-for-sale securities at March 31, 2013 and December 31, 2012 were as follows, in millions:

			Pre-tax
	Cost Basis		Unrealized Gains		Unrealized Losses		Recorded Basis
March 31, 2013	$	19	$	3	$	—	$	22
December 31, 2012	$	19	$	3	$	—	$	22

Recurring Fair Value Measurements

Financial investments measured at fair value on a recurring basis at each reporting period and the amounts for each level within the fair value hierarchy were as follows, in millions:

			Fair Value Measurements Using
	Mar. 31, 2013		Quoted Market Prices (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Auction rate securities	$	22		—		—	$	22
Total	$	22	$	—	$	—	$	22

			Fair Value Measurements Using
	Dec. 31, 2012		Quoted Market Prices (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Auction rate securities	$	22	$	—	$	—	$	22
Total	$	22	$	—	$	—	$	22

Changes in Level 3 Financial Assets Measured at Fair Value on Recurring Basis

The following table summarizes the changes in Level 3 financial assets measured at fair value on a recurring basis for the three months ended March 31, 2013 and the year ended December 31, 2012, in millions:

	March 31, 2013 Auction Rate Securities		December 31, 2012 Auction Rate Securities
Fair value at beginning of period	$	22	$	22
Total losses included in earnings		—		—
Unrealized (losses)		—		—
Purchases		—		—
Settlements		—		—
Transfer from Level 3 to Level 2		—		—
Fair value at period end	$	22	$	22

Income from Financial Investments Net, Included in Other, Net, Within Other Income (Expense), Net

Income from financial investments net, included in other, net, within other income (expense), net, was as follows, in millions:

	Three Months Ended March  31,
	2013		2012
Realized gains from private equity funds	$	3	$	16
Total income from financial investments	$	3	$	16

XML

Stock-Based Compensation - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Long-term stock awards, including restoration options	1,000,000	1,000,000
Total unrecognized compensation expense	$ 17	$ 29
Weighted average remaining vesting period in years	2 years	3 years
Total market value (at the vesting date) of stock award shares	32	23
Stock awards granted subsequent to January 1, 2010 have a vesting period, in years	five	Five
Grant and expire date	No Later than 10 years	No Later than 10 years
Stock option shares forfeited		2,000,000
Unvested Awards [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Total unrecognized compensation expense	$ 94	$ 103
Weighted average remaining vesting period in years	4 years	4 years
Stock Option [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Stock option shares granted	869,000
Grant date exercise price per share	$ 20
Stock option shares forfeited	453,070
Long-Term Stock Awards [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Long-term stock awards, including restoration options	1,570,020

XML

Fair Value of Financial Investments and Liabilities - Company's Investments in Available-for-Sale Securities (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Fair Value Disclosures [Abstract]
Cost Basis	$ 19	$ 19
Pre-tax Unrealized Gains	3	3
Pre-tax Unrealized Losses
Recorded Basis	$ 22	$ 22

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Warranty (Tables)

3 Months Ended

Mar. 31, 2013

Product Warranties Disclosures [Abstract]

Changes in Warranty Liability

Changes in the Company’s warranty liability were as follows, in millions:

	Three Months Ended			Twelve Months Ended
	March 31, 2013			December 31, 2012
Balance at January 1	$	118		$	102
Accruals for warranties issued during the period		9			42
Accruals related to pre-existing warranties		1			16
Settlements made (in cash or kind) during the period		(10	)		(38	)
Other, net		—			(4	)
Balance at end of period	$	118		$	118

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Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2013

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Pre-Tax Compensation Expense and Related Income Tax Benefit for Stock-Based Incentives

Pre-tax compensation expense and the related income tax benefit for these stock-based incentives were as follows, in millions:

	Three Months Ended
	March 31,
	2013		2012
Long-term stock awards	$	9	$	8
Stock options		5		5
Phantom stock awards and stock appreciation rights		3		5
Total	$	17	$	18
Income tax benefit (37 percent tax rate - before valuation allowance)	$	6	$	7

Company's Long-Term Stock Award Activity

The Company’s long-term stock award activity was as follows, shares in millions:

	Three Months Ended
	March 31,
	2013		2012
Unvested stock award shares at January 1		8		10
Weighted average grant date fair value	$	16	$	17
Stock award shares granted		2		1
Weighted average grant date fair value	$	20	$	12
Stock award shares vested		2		2
Weighted average grant date fair value	$	16	$	17
Stock award shares forfeited		—		—
Weighted average grant date fair value	$	18	$	18
Unvested stock award shares at March 31		8		9
Weighted average grant date fair value	$	17	$	16

Company's Stock Option Activity

The Company’s stock option activity was as follows, shares in millions:

	Three Months Ended
	March 31,
	2013			2012
Option shares outstanding, January 1		30			36
Weighted average exercise price	$	21		$	21
Option shares granted		1			1
Weighted average exercise price	$	20		$	12
Option shares exercised		2			—
Aggregate intrinsic value on date of exercise (A)	$	17	million	$	1	million
Weighted average exercise price	$	11		$	8
Option shares forfeited		—			2
Weighted average exercise price	$	19		$	18
Option shares outstanding, March 31		29			35
Weighted average exercise price	$	22		$	21
Weighted average remaining option term (in years)		4			5
Option shares vested and expected to vest, March 31		29			35
Weighted average exercise price	$	22		$	21
Aggregate intrinsic value (A)	$	82	million	$	26	million
Weighted average remaining option term (in years)		4			5
Option shares exercisable (vested), March 31		23			25
Weighted average exercise price	$	24		$	23
Aggregate intrinsic value (A)	$	45	million	$	14	million
Weighted average remaining option term (in years)		4			4

(A) Aggregate intrinsic value is calculated using the Company’s stock price at each respective date, less the exercise price (grant date price) multiplied by the number of shares.

Weighted Average Grant Date Fair Value of Option Shares Granted and Assumptions Used to Estimate Those Values Using Black-Scholes Option Pricing Model

The weighted average grant date fair value of option shares granted in the period and the assumptions used to estimate those values using a Black-Scholes option pricing model were as follows:

	Three Months Ended March  31,
	2013			2012
Weighted average grant date fair value	$	8.33		$	4.44
Risk-free interest rate		1.20	%		1.10	%
Dividend yield		1.47	%		2.57	%
Volatility factor		49.00	%		51.00	%
Expected option life		6 years			6 years

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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (USD $) In Millions, unless otherwise specified	Total	Common Shares ($1 par value) [Member]	Paid-In Capital [Member]	Retained (Deficit) Earnings [Member]	Accumulated Other Comprehensive Income [Member]	Noncontrolling Interest [Member]
Beginning balance at Dec. 31, 2011	$ 742	$ 348	$ 65	$ 38	$ 76	$ 215
Total comprehensive income	78			33	27	18
Shares issued		2	(2)
Shares retired:
Repurchased	(8)	(1)	(7)
Surrendered (non-cash)	(7)		(7)
Cash dividends declared	(26)			(26)
Stock-based compensation	13		13
Ending balance at Mar. 31, 2012	792	349	62	45	103	233
Beginning balance at Dec. 31, 2012	534	349	16	(102)	59	212
Total comprehensive income	25			47	(23)	1
Shares issued	(7)	2	(9)
Shares retired:
Repurchased	(35)	(2)	(11)	(22)
Surrendered (non-cash)	(10)		(10)
Cash dividends declared	(26)			(26)
Stock-based compensation	14		14
Ending balance at Mar. 31, 2013	$ 495	$ 349		$ (103)	$ 36	$ 213

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Employee Retirement Plans (Tables)

3 Months Ended

Mar. 31, 2013

Compensation And Retirement Disclosure [Abstract]

Net Periodic Pension Cost for Defined-Benefit Pension Plans

Net periodic pension cost for the Company’s defined-benefit pension plans was as follows, in millions:

	Three Months ended March 31,
	2013					2012
	Qualified			Non-Qualified		Qualified			Non-Qualified
Service cost	$	1		$	—	$	2		$	—
Interest cost		10			1		10			1
Expected return on plan assets		(9	)		—		(8	)		—
Amortization of net loss		4			1		3			1
Net periodic pension cost	$	6		$	2	$	7		$	2

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Goodwill and Other Intangible Assets - Changes in Carrying Amount of Goodwill (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Goodwill [Line Items]
Gross Goodwill	$ 3,861	$ 3,864
Accumulated Impairment Losses	(1,970)	(1,970)
Net Goodwill	1,891	1,894
Other	(5)
Additions	2
Net Goodwill	1,891	1,894
Cabinets and Related Products [Member]
Goodwill [Line Items]
Gross Goodwill	240	240
Accumulated Impairment Losses	(59)	(59)
Net Goodwill	181	181
Other
Additions
Net Goodwill	181	181
Plumbing Products [Member]
Goodwill [Line Items]
Gross Goodwill	539	544
Accumulated Impairment Losses	(340)	(340)
Net Goodwill	199	204
Other	(5)
Additions
Net Goodwill	199	204
Installation and Other Services [Member]
Goodwill [Line Items]
Gross Goodwill	1,806	1,806
Accumulated Impairment Losses	(762)	(762)
Net Goodwill	1,044	1,044
Other
Additions
Net Goodwill	1,044	1,044
Decorative Architectural Products [Member]
Goodwill [Line Items]
Gross Goodwill	294	294
Accumulated Impairment Losses	(75)	(75)
Net Goodwill	219	219
Other
Additions
Net Goodwill	219	219
Other Specialty Products [Member]
Goodwill [Line Items]
Gross Goodwill	982	980
Accumulated Impairment Losses	(734)	(734)
Net Goodwill	248	246
Other
Additions	2
Net Goodwill	$ 248	$ 246

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Debt - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Jun. 21, 2010
Proforma Debt Instrument [Line Items]
Aggregate amount add back to future non-cash charges	$ 1,250	$ 1,250
Credit agreement, maturity date	Mar. 28, 2018
Either rate per annum equal to lower of prime rate Federal Funds effective rate plus half percent plus applicable margin	0.50%
Either rate per annum equal to lower of prime rate Federal Funds effective LIBOR plus one percent plus applicable margin	1.00%
Non-cash charges, including goodwill and other intangible asset impairment charges	250
Debt to total adjusted capitalization ratio	65.00%
Additional borrowing capacity	858
Absorption of reduction to shareholders' equity to remain in compliance with covenant	462
Maximum [Member]
Proforma Debt Instrument [Line Items]
Minimum interest coverage ratio	2.5
Minimum [Member]
Proforma Debt Instrument [Line Items]
Minimum interest coverage ratio	1.00
Euros Denominated Revolver [Member]
Proforma Debt Instrument [Line Items]
Borrowing capacity, maximum	500
Swingline Loans [Member]
Proforma Debt Instrument [Line Items]
Borrowing capacity, maximum	150
Letters of Credit [Member]
Proforma Debt Instrument [Line Items]
Borrowing capacity, maximum	250
Outstanding and unused Letters of Credit	$ 78

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CONSOLIDATED BALANCE SHEETS (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash investments	$ 1,032	$ 1,351
Receivables	1,174	933
Prepaid expenses and other	107	107
Assets held for sale	98	100
Inventories:
Finished goods	408	368
Raw material	261	266
Work in process	94	92
Inventories	763	726
Total current assets	3,174	3,217
Property and equipment, net	1,294	1,326
Goodwill	1,891	1,894
Other intangible assets, net	150	151
Other assets	182	184
Assets held for sale	88	103
Total assets	6,779	6,875
Current liabilities:
Notes payable	206	206
Accounts payable	863	788
Accrued liabilities	714	823
Liabilities held for sale	43	45
Total current liabilities	1,826	1,862
Long-term debt	3,421	3,422
Deferred income taxes and other	1,037	1,053
Liabilities held for sale		4
Total liabilities	6,284	6,341
Commitments and contingencies
Masco Corporation's shareholders' equity:
Common shares, par value $1 per share Authorized shares: 1,400,000,000; issued and outstanding: 2013 - 349,100,000; 2012 -349,000,000	349	349
Preferred shares authorized: 1,000,000; issued and outstanding: 2013 - None; 2012 - None
Paid-in capital		16
Accumulated deficit	(103)	(102)
Accumulated other comprehensive income	36	59
Total Masco Corporation's shareholders' equity	282	322
Noncontrolling interest	213	212
Total equity	495	534
Total liabilities and equity	$ 6,779	$ 6,875

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Fair Value of Financial Investments and Liabilities - Recurring Fair Value Measurements (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, fair value disclosure	$ 93	$ 95
Recurring Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, fair value disclosure	22	22
Auction Rate Securities [Member] | Recurring Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, fair value disclosure	22	22
Assets at Fair Value (Level 1) [Member] | Recurring Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, fair value disclosure
Assets at Fair Value (Level 1) [Member] | Auction Rate Securities [Member] | Recurring Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, fair value disclosure
Assets at Fair Value (Level 2) [Member] | Recurring Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, fair value disclosure
Assets at Fair Value (Level 2) [Member] | Auction Rate Securities [Member] | Recurring Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, fair value disclosure
Assets at Fair Value (Level 3) [Member] | Recurring Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, fair value disclosure	22	22
Assets at Fair Value (Level 3) [Member] | Auction Rate Securities [Member] | Recurring Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, fair value disclosure	$ 22	$ 22

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CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Parenthetical) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Statement Of Income And Comprehensive Income [Abstract]
Income tax on interest rate swaps
Income tax on unrecognized pension prior service cost and net loss

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Stock-Based Compensation - Weighted Average Grant Date Fair Value of Option Shares Granted and Assumptions Used to Estimate Those Values Using Black-Scholes Option Pricing Model (Detail) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Weighted average grant date fair value	$ 8.33	$ 4.44
Risk-free interest rate	1.20%	1.10%
Dividend yield	1.47%	2.57%
Volatility factor	49.00%	51.00%
Expected option life	6 years	6 years

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Other Income (Expense), Net (Tables)

3 Months Ended

Mar. 31, 2013

Other Income And Expenses [Abstract]

Other, Net, Included in Other Income (Expense), Net

Other, net, which is included in other income (expense), net, was as follows, in millions:

	Three Months Ended March  31,
	2013		2012
Income from cash and cash investments	$	1	$	2
Income from financial investments (Note E)		3		16
Other items, net		3		(3	)
Total other, net	$	7	$	15

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Other Income (Expenses), Net - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Other Income And Expenses [Abstract]
Currency gains (losses) included in other items, net	$ 3	$ (1)

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Earnings Per Common Share

3 Months Ended

Mar. 31, 2013

Earnings Per Share [Abstract]

Earnings Per Common Share

N. Reconciliations of the numerators and denominators used in the computations of basic and diluted earnings per common share were as follows, in millions:

	Three Months Ended
	March 31,
	2013			2012
Numerator (basic and diluted):
Income from continuing operations	$	56		$	42
Allocation to unvested restricted stock awards		(1	)		(1	)
Income from continuing operations attributable to common shareholders	$	55		$	41
Loss from discontinued operations, net		(9	)		(9	)
Net income available to common shareholders	$	46		$	32
Denominator:
Basic common shares (based upon weighted average)		350			349
Add:
Contingent common shares		—			—
Stock option dilution		2			1
Diluted common shares		352			350

For the three months ended March 31, 2013 and 2012, the Company allocated dividends to the unvested restricted stock awards (participating securities).

Additionally, 15 million and 30 million common shares for the three months ended March 31, 2013 and 2012, respectively, related to stock options were excluded from the computation of diluted earnings per common share due to their antidilutive effect.

In the first three months of 2013, the Company granted 1.6 million shares of long-term stock awards. To offset the dilutive impact of these awards and awards granted in late 2012, the Company repurchased and retired 1.7 million shares of Company common stock, for cash aggregating approximately $35 million. At March 31, 2013, the Company had 22.6 million shares of its common stock remaining under the July 2007 Board of Directors’ repurchase authorization.

On the basis of amounts paid (declared), cash dividends per common share were $.075 ($.075) and $.075 ($.075), respectively, for the three months ended March 31, 2013 and 2012.

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Earnings Per Common Share (Tables)

3 Months Ended

Mar. 31, 2013

Earnings Per Share [Abstract]

Numerators and Denominators Used in Computations of Basic and Diluted Earnings Per Common Share

Reconciliations of the numerators and denominators used in the computations of basic and diluted earnings per common share were as follows, in millions:

	Three Months Ended March  31,
	2013			2012
Numerator (basic and diluted):
Income from continuing operations	$	56		$	42
Allocation to unvested restricted stock awards		(1	)		(1	)
Income from continuing operations attributable to common shareholders	$	55		$	41
Loss from discontinued operations, net		(9	)		(9	)
Net income available to common shareholders	$	46		$	32
Denominator:
Basic common shares (based upon weighted average)		350			349
Add:
Contingent common shares		—			—
Stock option dilution		2			1
Diluted common shares		352			350

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Income Taxes

3 Months Ended

Mar. 31, 2013

Income Tax Disclosure [Abstract]

Income Taxes

P. The effective tax rate in the first quarter of 2013 was 18 percent primarily due to a decrease in the valuation allowance resulting from the partial utilization of our U.S. Federal net operating loss carryforward and from a $12 million state income tax benefit on uncertain tax positions due to the expiration of applicable statutes of limitations in various jurisdictions.

As a result of tax audit closings, settlements and expiration of applicable statutes of limitations in various jurisdictions within the next 12 months, the Company anticipates that it is reasonably possible that the liability for uncertain tax positions could be reduced by approximately $3 million.

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Income Taxes - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013 M
Income Tax Disclosure [Abstract]
Effective tax rate	18.00%
State income tax benefit	$ 12
Time limits for tax audit closings, settlements and expiration of applicable statutes of limitations in various jurisdictions	12
Reduction in the liability for unrecognized tax benefits	$ 3

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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
CASH FLOWS FROM (FOR) OPERATING ACTIVITIES:
Cash provided by operations	$ 130	$ 90
Increase in receivables	(263)	(272)
Increase in inventories	(43)	(50)
(Decrease) increase in accounts payable and accrued liabilities, net	(34)	65
Net cash for operating activities	(210)	(167)
CASH FLOWS FROM (FOR) FINANCING ACTIVITIES:
Purchase of Company common stock	(35)	(8)
Cash dividends paid	(26)	(26)
New Credit Agreement costs	(4)
Issuance of Notes, net of issuance costs		396
Retirement of Notes		(46)
Payment for settlement of swaps		(25)
Payment of debt		(1)
Net cash (for) from financing activities	(65)	290
CASH FLOWS FROM (FOR) INVESTING ACTIVITIES:
Capital expenditures	(31)	(24)
Acquisition of companies, net of cash acquired	(5)
Proceeds from disposition of:
Other financial investments	5	23
Property and equipment	5	8
Purchases of other financial investments		(1)
Other, net	(4)	(8)
Net cash for investing activities	(30)	(2)
Effect of exchange rate changes on cash and cash investments	(14)	11
CASH AND CASH INVESTMENTS:
(Decrease) increase for the period	(319)	132
At January 1	1,351	1,656
At March 31	$ 1,032	$ 1,788

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CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Statement Of Financial Position [Abstract]
Common shares, par value	$ 1	$ 1
Common shares, shares Authorized	1,400,000,000	1,400,000,000
Common shares, shares issued	349,100,000	349,000,000
Common shares, shares outstanding	349,100,000	349,000,000
Preferred shares, shares authorized	1,000,000	1,000,000
Preferred shares, shares issued	0	0
Preferred shares, shares outstanding	0	0

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Stock-Based Compensation

3 Months Ended

Mar. 31, 2013

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock-Based Compensation

I. The Company’s 2005 Long Term Stock Incentive Plan (the “2005 Plan”) provides for the issuance of stock-based incentives in various forms to employees and non-employee Directors of the Company. At March 31, 2013, outstanding stock-based incentives were in the form of long-term stock awards, stock options, phantom stock awards and stock appreciation rights. Pre-tax compensation expense and the related income tax benefit for these stock-based incentives were as follows, in millions:

	Three Months Ended
	March 31,
	2013		2012
Long-term stock awards	$	9	$	8
Stock options		5		5
Phantom stock awards and stock appreciation rights		3		5
Total	$	17	$	18
Income tax benefit (37 percent tax rate - before valuation allowance)	$	6	$	7

Long-Term Stock Awards. Long-term stock awards are granted to key employees and non-employee Directors of the Company and do not cause net share dilution inasmuch as the Company continues the practice of repurchasing and retiring an equal number of shares in the open market. The Company granted 1,570,020 shares of long-term stock awards in the three months ended March 31, 2013.

The Company’s long-term stock award activity was as follows, shares in millions:

	Three Months Ended
	March 31,
	2013		2012
Unvested stock award shares at January 1		8		10
Weighted average grant date fair value	$	16	$	17
Stock award shares granted		2		1
Weighted average grant date fair value	$	20	$	12
Stock award shares vested		2		2
Weighted average grant date fair value	$	16	$	17
Stock award shares forfeited		—		—
Weighted average grant date fair value	$	18	$	18
Unvested stock award shares at March 31		8		9
Weighted average grant date fair value	$	17	$	16

At March 31, 2013 and 2012, there was $94 million and $103 million, respectively, of total unrecognized compensation expense related to unvested stock awards; such awards had a weighted average remaining vesting period of four years in both periods.

The total market value (at the vesting date) of stock award shares which vested during the three months ended March 31, 2013 and 2012 was $32 million and $23 million, respectively.

Stock Options. Stock options are granted to key employees of the Company. The exercise price equals the market price of the Company’s common stock at the grant date. These options generally become exercisable (vest ratably) over five years beginning on the first anniversary from the date of grant and expire no later than 10 years after the grant date.

The Company granted 869,000 of stock option shares in the three months ended March 31, 2013 with a grant date exercise price approximating $20 per share. In the first three months of 2013, 453,070 stock option shares were forfeited (including options that expired unexercised).

The Company’s stock option activity was as follows, shares in millions:

	Three Months Ended
	March 31,
	2013			2012
Option shares outstanding, January 1		30			36
Weighted average exercise price	$	21		$	21
Option shares granted		1			1
Weighted average exercise price	$	20		$	12
Option shares exercised		2			—
Aggregate intrinsic value on date of exercise (A)	$	17	million	$	1	million
Weighted average exercise price	$	11		$	8
Option shares forfeited		—			2
Weighted average exercise price	$	19		$	18
Option shares outstanding, March 31		29			35
Weighted average exercise price	$	22		$	21
Weighted average remaining option term (in years)		4			5
Option shares vested and expected to vest, March 31		29			35
Weighted average exercise price	$	22		$	21
Aggregate intrinsic value (A)	$	82	million	$	26	million
Weighted average remaining option term (in years)		4			5
Option shares exercisable (vested), March 31		23			25
Weighted average exercise price	$	24		$	23
Aggregate intrinsic value (A)	$	45	million	$	14	million
Weighted average remaining option term (in years)		4			4

(A) Aggregate intrinsic value is calculated using the Company’s stock price at each respective date, less the exercise price (grant date price) multiplied by the number of shares.

At March 31, 2013 and 2012, there was $17 million and $29 million, respectively, of unrecognized compensation expense (using the Black-Scholes option pricing model) related to unvested stock options; such options had a weighted average vesting period of two years and three years in 2013 and 2012, respectively.

The weighted average grant date fair value of option shares granted in the period and the assumptions used to estimate those values using a Black-Scholes option pricing model were as follows:

	Three Months Ended
	March 31,
	2013			2012
Weighted average grant date fair value	$	8.33		$	4.44
Risk-free interest rate		1.20	%		1.10	%
Dividend yield		1.47	%		2.57	%
Volatility factor		49.00	%		51.00	%
Expected option life		6 years			6 years

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Document and Entity Information	3 Months Ended
	Mar. 31, 2013	Apr. 26, 2013
Document Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q1
Trading Symbol	MAS
Entity Registrant Name	MASCO CORP /DE/
Entity Central Index Key	0000062996
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		356,866,800

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Employee Retirement Plans

3 Months Ended

Mar. 31, 2013

Compensation And Retirement Disclosure [Abstract]

Employee Retirement Plans

J. Net periodic pension cost for the Company’s defined-benefit pension plans was as follows, in millions:

	Three Months ended March 31,
	2013					2012
	Qualified			Non-Qualified		Qualified			Non-Qualified
Service cost	$	1		$	—	$	2		$	—
Interest cost		10			1		10			1
Expected return on plan assets		(9	)		—		(8	)		—
Amortization of net loss		4			1		3			1
Net periodic pension cost	$	6		$	2	$	7		$	2

The Company participates in 20 regional multi-employer pension plans, principally related to building trades; none of the plans are considered significant to the Company.

Effective January 1, 2010, the Company froze all future benefit accruals under substantially all of the Company’s domestic qualified and non-qualified defined benefit pension plans. Future benefit accruals related to the Company’s foreign non-qualified plans were frozen several years ago.

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CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Income Statement [Abstract]
Net sales	$ 1,876	$ 1,806
Cost of sales	1,368	1,322
Gross profit	508	484
Selling, general and administrative expenses	376	377
Income from litigation settlements, net		(2)
Operating profit	132	109
Other income (expense), net:
Interest expense	(60)	(64)
Other, net	7	15
Total other income (expense), net	(53)	(49)
Income from continuing operations before income taxes	79	60
Income taxes	14	7
Income from continuing operations	65	53
Loss from discontinued operations	(9)	(9)
Net income	56	44
Less: Net income attributable to noncontrolling interest	9	11
Net income attributable to Masco Corporation	47	33
Basic:
Income from continuing operations	$ 0.16	$ 0.12
Loss from discontinued operations	$ (0.03)	$ (0.03)
Net income	$ 0.13	$ 0.09
Diluted:
Income from continuing operations	$ 0.16	$ 0.12
Loss from discontinued operations	$ (0.03)	$ (0.03)
Net income	$ 0.13	$ 0.09
Amounts attributable to Masco Corporation:
Income from continuing operations	56	42
Loss from discontinued operations	(9)	(9)
Net income attributable to Masco Corporation	$ 47	$ 33

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Depreciation and Amortization Expense

3 Months Ended

Mar. 31, 2013

Property Plant And Equipment [Abstract]

Depreciation and Amortization Expense

D. Depreciation and amortization expense, including discontinued operations, was $49 million and $55 million, including accelerated depreciation, relating to business rationalization initiatives, of $4 million and $7 million, for the three months ended March 31, 2013 and 2012, respectively.

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Goodwill and Other Intangible Assets

3 Months Ended

Mar. 31, 2013

Goodwill And Intangible Assets Disclosure [Abstract]

Goodwill and Other Intangible Assets

C. The changes in the carrying amount of goodwill for the three months ended March 31, 2013, by segment, were as follows, in millions:

	Gross Goodwill		Accumulated			Net Goodwill
	At		Impairment			At
	Mar. 31, 2013		Losses			Mar. 31, 2013
Cabinets and Related Products	$	240	$	(59	)	$	181
Plumbing Products		539		(340	)		199
Installation and Other Services		1,806		(762	)		1,044
Decorative Architectural Products		294		(75	)		219
Other Specialty Products		982		(734	)		248
Total	$	3,861	$	(1,970	)	$	1,891

	Gross Goodwill At Dec. 31, 2012		Accumulated Impairment Losses			Net Goodwill At Dec. 31, 2012		Other(A)			Additions(B)		Net Goodwill At Mar. 31, 2013
Cabinets and Related Products	$	240	$	(59	)	$	181	$	—		$	—	$	181
Plumbing Products		544		(340	)		204		(5	)		—		199
Installation and Other Services		1,806		(762	)		1,044		—			—		1,044
Decorative Architectural Products		294		(75	)		219		—			—		219
Other Specialty Products		980		(734	)		246		—			2		248
Total	$	3,864	$	(1,970	)	$	1,894	$	(5	)	$	2	$	1,891

(A) Other principally includes the effect of foreign currency translation.

(B) Additions include the acquisition of a U.K. door business.

Other indefinite-lived intangible assets were $132 million at both March 31, 2013 and December 31, 2012, and principally included registered trademarks. The carrying value of the Company’s definite-lived intangible assets was $18 million (net of accumulated amortization of $58 million) at March 31, 2013 and $19 million (net of accumulated amortization of $57 million) at December 31, 2012, and principally included customer relationships and non-compete agreements.

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Other Commitments and Contingencies

3 Months Ended

Mar. 31, 2013

Commitments And Contingencies Disclosure [Abstract]

Other Commitments and Contingencies

O. We are subject to claims, charges, litigation and other proceedings in the ordinary course of our business, including those arising from or related to contractual matters, intellectual property, personal injury, environmental matters, product liability, product recalls, construction defect, insurance coverage, personnel and employment disputes and other matters, including class actions. We believe we have adequate defenses in these matters and that the outcome of these matters is not likely to have a material adverse effect on us. However, there is no assurance that we will prevail in these matters, and we could in the future incur judgments, enter into settlements of claims or revise our expectations regarding the outcome of these matters, which could materially impact our results of operations.

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Accumulated Other Comprehensive Income (loss)

3 Months Ended

Mar. 31, 2013

Equity [Abstract]

Accumulated Other Comprehensive Income (loss)

K. The reclassifications from accumulated other comprehensive income (loss) to the income statement were as follows, in millions:

	Amount
Accumulated Other Comprehensive Income (Loss)	Reclassified
	March 31,
	2013		2012		Income Statement Line Item
Amortization of defined benefit pension:
Actuarial losses, net	$	5	$	4	Selling, General & Administrative Expense
		—		—	Tax expense
	$	5	$	4	Net of tax
Interest rate swaps	$	—	$	—	Interest expense

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Warranty

3 Months Ended

Mar. 31, 2013

Product Warranties Disclosures [Abstract]

Warranty

G. Changes in the Company’s warranty liability were as follows, in millions:

	Three Months Ended			Twelve Months Ended
	March 31, 2013			December 31, 2012
Balance at January 1	$	118		$	102
Accruals for warranties issued during the period		9			42
Accruals related to pre-existing warranties		1			16
Settlements made (in cash or kind) during the period		(10	)		(38	)
Other, net		—			(4	)
Balance at end of period	$	118		$	118

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Employee Retirement Plans - Net Periodic Pension Cost for Defined Benefit Pension Plans (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Qualified Plans [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Service cost	$ 1	$ 2
Interest cost	10	10
Expected return on plan assets	(9)	(8)
Amortization of net loss	4	3
Net periodic pension cost	6	7
Non-Qualified Plans [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Service cost
Interest cost	1	1
Expected return on plan assets
Amortization of net loss	1	1
Net periodic pension cost	$ 2	$ 2

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Fair Value of Financial Investments and Liabilities

3 Months Ended

Mar. 31, 2013

Fair Value Disclosures [Abstract]

Fair Value of Financial Investments and Liabilities

E. The Company has maintained investments in available-for-sale securities and a number of private equity funds, principally as part of its tax planning strategies, as any gains enhance the utilization of any current and future tax capital losses. Financial investments included in other assets were as follows, in millions:

	March 31, 2013		December 31, 2012
Auction rate securities	$	22	$	22
Total recurring investments		22		22
Private equity funds		67		69
Other investments		4		4
Total non-recurring investments		71		73
Total	$	93	$	95

The Company’s investments in available-for-sale securities at March 31, 2013 and December 31, 2012 were as follows, in millions:

			Pre-tax
	Cost Basis		Unrealized Gains		Unrealized Losses		Recorded Basis
March 31, 2013	$	19	$	3	$	—	$	22
December 31, 2012	$	19	$	3	$	—	$	22

Recurring Fair Value Measurements. Financial investments measured at fair value on a recurring basis at each reporting period and the amounts for each level within the fair value hierarchy were as follows, in millions:

			Fair Value Measurements Using
	Mar. 31, 2013		Quoted Market Prices (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Auction rate securities	$	22		—		—	$	22
Total	$	22	$	—	$	—	$	22

			Fair Value Measurements Using
	Dec. 31, 2012		Quoted Market Prices (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Auction rate securities	$	22	$	—	$	—	$	22
Total	$	22	$	—	$	—	$	22

The fair value of the auction rate securities held by the Company have been estimated, on a recurring basis, using a discounted cash flow model (Level 3 input). The significant inputs in the discounted cash flow model used to value the auction rate securities include the expected maturity date of auction rate securities, discount rate used to determine the present value of expected cash flows and the assumptions for credit defaults, since the auction rate securities are backed by credit default swap agreements.

The following table summarizes the changes in Level 3 financial assets measured at fair value on a recurring basis for the three months ended March 31, 2013 and the year ended December 31, 2012, in millions:

	March 31, 2013 Auction Rate Securities		December 31, 2012 Auction Rate Securities
Fair value at beginning of period	$	22	$	22
Total losses included in earnings		—		—
Unrealized (losses)		—		—
Purchases		—		—
Settlements		—		—
Transfer from Level 3 to Level 2		—		—
Fair value at period end	$	22	$	22

Non-Recurring Fair Value Measurements. During the three-months ended March 31, 2013 and 2012, the Company did not measure any financial investments at fair value on a non-recurring basis, as there was no other-than-temporary decline in the estimated value of private equity funds.

The Company did not have any transfers between Level 1 and Level 2 financial assets in the three months ended March 31, 2013 or 2012

Realized Gains. Income from financial investments net, included in other, net, within other income (expense), net, was as follows, in millions:

	Three Months Ended March  31,
	2013		2012
Realized gains from private equity funds	$	3	$	16
Total income from financial investments	$	3	$	16

The fair value of the Company’s short-term and long-term fixed-rate debt instruments is based principally upon modeled market prices for the same or similar issues or the current rates available to the Company for debt with similar terms and remaining maturities. The aggregate estimated market value of short-term and long-term debt at March 31, 2013 was approximately $4.0 billion, compared with the aggregate carrying value of $3.6 billion. The aggregate estimated market value of short-term and long-term debt at December 31, 2012 was approximately $4.0 billion, compared with the aggregate carrying value of $3.6 billion.

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Derivative Instruments and Hedging Activities

3 Months Ended

Mar. 31, 2013

Derivative Instruments And Hedging Activities Disclosure [Abstract]

Derivative Instruments and Hedging Activities

F. The Company is exposed to global market risk as part of its normal daily business activities. To manage these risks, the Company enters into various derivative contracts. These contracts include interest rate swap agreements, foreign currency exchange contracts and contracts intended to hedge the Company’s exposure to copper and zinc. The Company reviews its hedging program, derivative positions and overall risk management on a regular basis.

Interest Rate Swap Agreements. In March 2012, in connection with the issuance of $400 million of debt, the Company terminated the interest rate swap hedge relationships that it entered into in August 2011. These interest rate swaps were designated as cash flow hedges and effectively fixed interest rates on the forecasted debt issuance to variable rates based on 3-month LIBOR. Upon termination, the ineffective portion of the cash flow hedges of approximately $2 million loss was recognized in the Company’s consolidated statement of income in other, net. The remaining loss of approximately $23 million from the termination of these swaps is being amortized as an increase to interest expense over the remaining term of the debt, through March 2022. At March 31, 2013, the balance remaining in Accumulated Other Comprehensive Income was $21 million.

In the three months ended March 31, 2012, the Company recognized a net decrease in interest expense of $3 million resulting from the amortization of net gains related to the terminations (in 2012, 2008 and 2004) of the interest rate swap agreements.

Foreign Currency Contracts. The Company’s net cash inflows and outflows exposed to the risk of changes in foreign currency exchange rates arise from the sale of products in countries other than the manufacturing source, foreign currency denominated supplier payments, debt and other payables, and investments in subsidiaries. To mitigate this risk during 2013 and 2012, the Company, including certain European operations, entered into foreign currency forward contracts and foreign currency exchange contracts.

Gains (losses) related to foreign currency forward and exchange contracts are recorded in the Company’s condensed consolidated statements of operations in other income (expense), net. In the event that the counterparties fail to meet the terms of the foreign currency forward contracts, the Company’s exposure is limited to the aggregate foreign currency rate differential with such institutions.

Metal Contracts. During 2013 and 2012, the Company entered into several contracts to manage its exposure to increases in the price of copper and zinc. Gains (losses) related to these contracts are recorded in the Company’s condensed consolidated statements of operations in cost of sales.

The pre-tax gain (loss) included in the Company’s condensed consolidated statements of operations is as follows, in millions:

	Three Months Ended
	March 31,
	2013			2012
Foreign Currency Contracts
Exchange Contracts	$	7		$	(5	)
Forward Contracts		2			(1	)
Metal Contracts		(4	)		7
Total gain	$	5		$	1

 The Company presents its derivatives, net by counterparty due to the right of offset under master netting arrangements in current assets or current liabilities in the condensed consolidated balance sheets. The notional amounts being hedged and the fair value of those derivative instruments, on a gross basis, are as follows, in millions:

	At March 31, 2013
	Notional
	Amount		Assets		Liabilities
Foreign Currency Contracts
Exchange Contracts	$	162
Current assets			$	4	$	1
Forward Contracts		68
Current assets				1		—
Metal Contracts		56
Current liabilities				—		4
Total			$	5	$	5

	At December 31, 2012
	Notional
	Amount		Assets		Liabilities
Foreign Currency Contracts
Exchange Contracts	$	172
Current liabilities			$	—	$	5
Forward Contracts		76
Current assets				1		1
Metal Contracts		35
Current liabilities				1		2
Total			$	2	$	8

The fair value of all metal and foreign currency derivative contracts is estimated on a recurring basis, quarterly, using Level 2 inputs (significant other observable inputs).

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Debt

3 Months Ended

Mar. 31, 2013

Debt Disclosure [Abstract]

Debt

H. On March 28, 2013, the Company entered into a credit agreement (the “New Credit Agreement”) with a bank group, with an aggregate commitment of $1.25 billion and a maturity date of March 28, 2018. Upon entry into the New Credit Agreement, the Company’s credit agreement dated as of June 21, 2010, as amended, with an aggregate commitment of $1.25 billion, was terminated.

The New Credit Agreement provides for an unsecured revolving credit facility available to the Company and one of its foreign subsidiaries, in U.S. dollars, European euros and certain other currencies. Borrowings under the revolver denominated in euros are limited to $500 million, equivalent. The Company can also borrow swingline loans up to $150 million and obtain letters of credit of up to $250 million; any outstanding Letters of Credit reduce the Company’s borrowing capacity. At March 31, 2013, the Company had $78 million of outstanding and unused Letters of Credit, reducing the Company’s borrowing capacity by such amount.

Revolving credit loans bear interest under the New Credit Agreement, at the Company’s option, at (A) a rate per annum equal to the greatest of (i) the prime rate, (ii) the Federal Funds effective rate plus 0.50% and (iii) LIBOR plus 1.0% (the “Alternative Base Rate”); plus an applicable margin based upon the then applicable corporate credit ratings of the Company; or (B) LIBOR plus an applicable margin based upon the then applicable corporate credit ratings of the Company. The foreign currency revolving credit loans bear interest at a rate equal to LIBOR plus an applicable margin based upon the then applicable corporate credit ratings of the Company.

The New Credit Agreement contains financial covenants requiring the Company to maintain (A) a maximum debt to total capitalization ratio, as adjusted for certain items, of 65 percent, and (B) a minimum interest coverage ratio, as adjusted for certain items, equal to or greater than 2.5 to 1.0. The debt to total capitalization ratio allows the add-back, if incurred, of up to the first $250 million of certain non-cash charges, including goodwill and other intangible asset impairment charges, occurring from and after January 1, 2012 that would negatively impact shareholders’ equity.

Based on the limitations of the debt to total capitalization ratio covenant in the New Credit Agreement, at March 31, 2013, the Company had additional borrowing capacity, subject to availability, of up to $858 million. Additionally, at March 31, 2013, the Company could absorb a reduction to shareholders’ equity of approximately $462 million and remain in compliance with the debt to total capitalization covenant.

In order for the Company to borrow under the New Credit Agreement, there must not be any default in the Company’s covenants in the New Credit Agreement (i.e., in addition to the two financial covenants, principally limitations on subsidiary debt, negative pledge restrictions, legal compliance requirements and maintenance of properties and insurance) and the Company’s representations and warranties in the New Credit Agreement must be true in all material respects on the date of borrowing (i.e., principally no material adverse change or litigation likely to result in a material adverse change, since December 31, 2012, in each case, no material ERISA or environmental non-compliance and no material tax deficiency). The Company was in compliance with all covenants and no borrowings have been made at March 31, 2013.

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Other Income (Expense), Net - Other, Net, Included in Other Income (Expense), Net (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Other Income And Expenses [Abstract]
Income from cash and cash investments	$ 1	$ 2
Income from financial investments (Note E)	3	16
Other items, net	3	(3)
Total other, net	$ 7	$ 15

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Earnings Per Common Share - Numerators and Denominators Used in Computations of Basic and Diluted Earnings Per Common Share (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Numerator (basic and diluted):
Income from continuing operations	$ 56	$ 42
Allocation to unvested restricted stock awards	(1)	(1)
Income from continuing operations attributable to common shareholders	55	41
Loss from discontinued operations, net	(9)	(9)
Net income available to common shareholders	$ 46	$ 32
Denominator:
Basic common shares (based upon weighted average)	350	349
Contingent common shares
Stock option dilution	2	1
Diluted common shares	352	350

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Segment Information - Company by Segment and Geographic Area (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Operating Statistics [Line Items]
Segment Reporting, Net Sales	$ 1,876	$ 1,806
General corporate expense, net	(34)	(28)
Income from litigation settlements		2
Operating profit, as reported	132	109
Other income (expense), net	(53)	(49)
Income from continuing operations before income taxes	79	60
Cabinets and Related Products [Member]
Operating Statistics [Line Items]
Segment Reporting, Net Sales	236	228
Operating profit, as reported	(4)	(16)
Plumbing Products [Member]
Operating Statistics [Line Items]
Segment Reporting, Net Sales	762	742
Operating profit, as reported	86	97
Installation and Other Services [Member]
Operating Statistics [Line Items]
Segment Reporting, Net Sales	312	278
Operating profit, as reported	(4)	(14)
Decorative Architectural Products [Member]
Operating Statistics [Line Items]
Segment Reporting, Net Sales	432	434
Operating profit, as reported	89	73
Other Specialty Products [Member]
Operating Statistics [Line Items]
Segment Reporting, Net Sales	134	124
Operating profit, as reported	(1)	(5)
Total [Member]
Operating Statistics [Line Items]
Segment Reporting, Net Sales	1,876	1,806
Operating profit, as reported	166	135
North America [Member]
Operating Statistics [Line Items]
Segment Reporting, Net Sales	1,510	1,431
Operating profit, as reported	140	88
International, Principally Europe [Member]
Operating Statistics [Line Items]
Segment Reporting, Net Sales	366	375
Operating profit, as reported	$ 26	$ 47

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Segment Information (Tables)

3 Months Ended

Mar. 31, 2013

Segment Reporting [Abstract]

Company by Segment and Geographic Area

Information about the Company by segment and geographic area was as follows, in millions:

	Three Months Ended March 31,
	2013		2012		2013			2012
	Net Sales(A)				Operating Profit (Loss)
The Company’s operations by segment were:
Cabinets and Related Products	$	236	$	228	$	(4	)	$	(16	)
Plumbing Products		762		742		86			97
Installation and Other Services		312		278		(4	)		(14	)
Decorative Architectural Products		432		434		89			73
Other Specialty Products		134		124		(1	)		(5	)
Total	$	1,876	$	1,806	$	166		$	135
The Company’s operations by geographic area were:
North America	$	1,510	$	1,431	$	140		$	88
International, principally Europe		366		375		26			47
Total	$	1,876	$	1,806		166			135
General corporate expense, net						(34	)		(28	)
Income from litigation settlements						—			2
Operating profit, as reported						132			109
Other income (expense), net						(53	)		(49	)
Income from continuing operations before income taxes					$	79		$	60

(A) Inter-segment sales were not material.

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Derivative Instruments and Hedging Activities - Fair Value of Derivative Instruments Presented on Gross Basis (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]
Current liabilities	$ 5	$ 8
Current assets	5	2
Notional Amount
Exchange Contracts [Member]
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]
Current liabilities		5
Assets, Contracts
Current assets	4
Current liabilities
Notional Amount	162	172
Exchange Contracts [Member] | Current assets [Member]
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]
Current liabilities	1
Notional Amount
Forward Contracts [Member]
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]
Current liabilities		1
Assets, Contracts
Current assets	1	1
Notional Amount	68	76
Forward Contracts [Member] | Current assets [Member]
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]
Current liabilities
Notional Amount
Metals Contracts [Member]
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]
Current liabilities
Assets, Contracts
Current liabilities		1
Notional Amount	56	35
Metals Contracts [Member] | Current liabilities [Member]
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]
Current liabilities	4	2
Notional Amount

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Other Income (Expense), Net

3 Months Ended

Mar. 31, 2013

Other Income And Expenses [Abstract]

Other Income (Expense), Net

M. Other, net, which is included in other income (expense), net, was as follows, in millions:

	Three Months Ended
	March 31,
	2013		2012
Income from cash and cash investments	$	1	$	2
Income from financial investments (Note E)		3		16
Other items, net		3		(3	)
Total other, net	$	7	$	15

Other items, net, included $3 million and $(1) million of currency gains (losses) for the three months ended March 31, 2013 and 2012, respectively.

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Discontinued Operations (Tables)

3 Months Ended

Mar. 31, 2013

Discontinued Operations And Disposal Groups [Abstract]

Financial Information for Discontinued Operations

Selected financial information for the discontinued operations, during the period owned by the Company, was as follows, in millions: 

	Three Months Ended
	March 31,
	2013			2012
Net Sales	$	59		$	89
Operating loss from discontinued operations	$	(3	)	$	(11	)
Impairment of assets		(10	)		—
Loss on disposal of discontinued operations, net		—			(1	)
Loss before income tax		(13	)		(12	)
Income tax benefit		(4	)		(3	)
Loss from discontinued operations	$	(9	)	$	(9	)

Balance Sheet Items Reclassified as Held for Sale

The following balance sheet items have been reclassified as held for sale:

	March 31,		December 31,
	2013		2012
Receivables	$	32	$	32
Inventories		64		66
Prepaid expenses and other		2		2
Property and equipment, net		88		103
Total assets	$	186	$	203
Accounts payable	$	31	$	31
Accrued liabilities		12		14
Deferred income taxes		—		4
Total liabilities	$	43	$	49

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Derivative Instruments and Hedging Activities - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Issued notes		$ 400
Forecasted debt issuance variable rate period		3-month LIBOR
Ineffective portion of the cash flow hedges		2
Loss from the termination of the interest rate swap agreement	21	23
Decrease in interest expense due to amortization of net gains on termination of interest rate swap agreement		$ 3

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Goodwill and Other Intangible Assets - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Goodwill And Intangible Assets Disclosure [Abstract]
Other indefinite-lived intangible assets	$ 132	$ 132
Carrying value of definite-lived intangible assets	18	19
Accumulated amortization	$ 58	$ 57

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CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 56	$ 44
Less: Net income attributable to noncontrolling interest	9	11
Net income attributable to Masco Corporation	47	33
Other comprehensive income (loss), net of tax (see Footnote K):
Cumulative translation adjustment	(36)	30
Interest rate swaps, net of income tax of $- and $-, respectively
Unrecognized pension prior service cost and net loss, net of income tax of $-and $-, respectively	5	4
Other comprehensive (loss) income	(31)	34
Less: Other comprehensive (loss) income attributable to noncontrolling interest	(8)	7
Other comprehensive (loss) income attributable to Masco Corporation	(23)	27
Total comprehensive income	25	78
Less: Total comprehensive income attributable to noncontrolling interest	1	18
Total comprehensive income attributable to Masco Corporation	$ 24	$ 60

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Discontinued Operations

3 Months Ended

Mar. 31, 2013

Discontinued Operations And Disposal Groups [Abstract]

Discontinued Operations

B. In the first quarter of 2013, the Company determined that Tvilum, its Danish ready-to-assemble cabinet business, is no longer core to its long-term growth strategy and, accordingly, the Company has embarked on a plan for disposition. The Company has accounted for this business and those which were sold in 2012 as discontinued operations.

Selected financial information for the discontinued operations, during the period owned by the Company, was as follows, in millions:

	Three Months Ended
	March 31,
	2013			2012
Net Sales	$	59		$	89
Operating loss from discontinued operations	$	(3	)	$	(11	)
Impairment of assets		(10	)		—
Loss on disposal of discontinued operations, net		—			(1	)
Loss before income tax		(13	)		(12	)
Income tax benefit		(4	)		(3	)
Loss from discontinued operations	$	(9	)	$	(9	)

Included in impairment of assets in 2013 is the impairment of fixed assets held for sale. During the first quarter of 2013, the Company estimated the fair value of the business held for sale, using unobservable inputs (Level 3). After considering the deferred gains reported in Accumulated Other Comprehensive Income, the Company recorded an impairment of $10 million in the first quarter of 2013.

The following balance sheet items have been reclassified as held for sale:

	March 31,		December 31,
	2013		2012
Receivables	$	32	$	32
Inventories		64		66
Prepaid expenses and other		2		2
Property and equipment, net		88		103
Total assets	$	186	$	203
Accounts payable	$	31	$	31
Accrued liabilities		12		14
Deferred income taxes		—		4
Total liabilities	$	43	$	49

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Stock-Based Compensation - Company's Stock Option Activity (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Option shares outstanding	30	36
Weighted average exercise price	$ 21	$ 21
Option shares granted	1	1
Weighted average exercise price	$ 20	$ 12
Option shares exercised	2
Aggregate intrinsic value on date of exercise	$ 17	$ 1
Weighted average exercise price	$ 11	$ 8
Option shares forfeited		2
Weighted average exercise price	$ 19	$ 18
Option shares outstanding	29	35
Weighted average exercise price	$ 22	$ 21
Weighted average remaining option term (in years)	4 years	5 years
Option shares vested and expected to vest	29	35
Weighted average exercise price	$ 22	$ 21
Aggregate intrinsic value	82	26
Weighted average remaining option term (in years)	4 years	5 years
Option shares exercisable (vested)	23	25
Weighted average exercise price	$ 24	$ 23
Aggregate intrinsic value	$ 45	$ 14
Weighted average remaining option term (in years)	4 years	4 years

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Goodwill and Other Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2013

Goodwill And Intangible Assets Disclosure [Abstract]

Changes in Carrying Amount of Goodwill

The changes in the carrying amount of goodwill for the three months ended March 31, 2013, by segment, were as follows, in millions:

	Gross Goodwill		Accumulated			Net Goodwill
	At		Impairment			At
	Mar. 31, 2013		Losses			Mar. 31, 2013
Cabinets and Related Products	$	240	$	(59	)	$	181
Plumbing Products		539		(340	)		199
Installation and Other Services		1,806		(762	)		1,044
Decorative Architectural Products		294		(75	)		219
Other Specialty Products		982		(734	)		248
Total	$	3,861	$	(1,970	)	$	1,891

	Gross Goodwill At Dec. 31, 2012		Accumulated Impairment Losses			Net Goodwill At Dec. 31, 2012		Other(A)			Additions(B)		Net Goodwill At Mar. 31, 2013
Cabinets and Related Products	$	240	$	(59	)	$	181	$	—		$	—	$	181
Plumbing Products		544		(340	)		204		(5	)		—		199
Installation and Other Services		1,806		(762	)		1,044		—			—		1,044
Decorative Architectural Products		294		(75	)		219		—			—		219
Other Specialty Products		980		(734	)		246		—			2		248
Total	$	3,864	$	(1,970	)	$	1,894	$	(5	)	$	2	$	1,891

(A) Other principally includes the effect of foreign currency translation.

(B) Additions include the acquisition of a U.K. door business.

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Discontinued Operations - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Discontinued Operations And Disposal Groups [Abstract]
Impairment of assets	$ 10

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Segment Information

3 Months Ended

Mar. 31, 2013

Segment Reporting [Abstract]

Segment Information

L. Information about the Company by segment and geographic area was as follows, in millions:

	Three Months Ended March 31,
	2013		2012		2013			2012
	Net Sales(A)				Operating Profit (Loss)
The Company’s operations by segment were:
Cabinets and Related Products	$	236	$	228	$	(4	)	$	(16	)
Plumbing Products		762		742		86			97
Installation and Other Services		312		278		(4	)		(14	)
Decorative Architectural Products		432		434		89			73
Other Specialty Products		134		124		(1	)		(5	)
Total	$	1,876	$	1,806	$	166		$	135
The Company’s operations by geographic area were:
North America	$	1,510	$	1,431	$	140		$	88
International, principally Europe		366		375		26			47
Total	$	1,876	$	1,806		166			135
General corporate expense, net						(34	)		(28	)
Income from litigation settlements						—			2
Operating profit, as reported						132			109
Other income (expense), net						(53	)		(49	)
Income from continuing operations before income taxes					$	79		$	60

(A) Inter-segment sales were not material.