10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C.

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 28, 2015 Commission file number 1–6770

MUELLER INDUSTRIES, INC.

(Exact name of registrant as specified in its charter)

Delaware	25-0790410
(State or other jurisdiction	(I.R.S. Employer
of incorporation or organization)	Identification No.)

8285 Tournament Drive, Suite 150
Memphis, Tennessee	38125
(Address of principal executive offices)	(Zip Code)

(901) 753-3200

(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.    Yesx  Noo

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, 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).   Yesx  Noo

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   o
Non-accelerated filer   o	Smaller reporting company   o

Indicate by check mark whether the Registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).   Yeso  Nox

The number of shares of the Registrant’s common stock outstanding as of April 20, 2015, was 56,969,586.

MUELLER INDUSTRIES, INC.

FORM 10-Q

For the Quarterly Period Ended March 28, 2015

__________________________

As used in this report, the terms “Company,” “Mueller,” and “Registrant” mean Mueller Industries, Inc. and its consolidated subsidiaries taken as a whole, unless the context indicates otherwise.

__________________________

		Page Number
Part I.  Financial Information
	Item 1.  – Financial Statements (Unaudited)
	a.)  Condensed Consolidated Statements of Income	3
	b.)  Condensed Consolidated Statements of Comprehensive Income	4
	c.)  Condensed Consolidated Balance Sheets	5
	d.)  Condensed Consolidated Statements of Cash Flows	6
	e.)  Notes to Condensed Consolidated Financial Statements	7
	Item 2.  – Management’s Discussion and Analysis of Financial Condition and Results of Operations	16
	Item 3.  – Quantitative and Qualitative Disclosures About Market Risk	23
	Item 4.  – Controls and Procedures	24
Part II.  Other Information
	Item 1.  – Legal Proceedings	25
	Item 1A. – Risk Factors	25
	Item 2.  – Unregistered Sales of Equity Securities and Use of Proceeds	26
	Item 6.  – Exhibits	27
Signatures		28

2

PART I	FINANCIAL INFORMATION
Item 1.	Financial Statements

MUELLER INDUSTRIES, INC.

CONDENSED CONSOLIDATED STATEMENTS OF INCOME

(Unaudited)

	For the Quarter Ended
(In thousands, except per share data)	March 28, 2015			March 29, 2014
Net sales	$	537,242		$	574,374
Cost of goods sold		460,834			495,777
Depreciation and amortization		7,853			8,107
Selling, general, and administrative expense		32,831			32,183
Operating income		35,724			38,307
Interest expense		(2,076	)		(1,026	)
Other income, net		105			88
Income before income taxes		33,753			37,369
Income tax expense		(11,413	)		(12,415	)
Consolidated net income		22,340			24,954
Net income attributable to noncontrolling interest		(362	)		(248	)
Net income attributable to Mueller Industries, Inc.	$	21,978		$	24,706
Weighted average shares for basic earnings per share		56,193			55,918
Effect of dilutive stock-based awards		731			853
Adjusted weighted average shares for diluted earnings per share		56,924			56,771
Basic earnings per share	$	0.39		$	0.44
Diluted earnings per share	$	0.39		$	0.44
Dividends per share	$	0.075		$	0.075
See accompanying notes to condensed consolidated financial statements.

3

MUELLER INDUSTRIES, INC.

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(Unaudited)

		For the Quarter Ended
(In thousands)		March 28, 2015		March 29, 2014
Consolidated net income	$	22,340		$	24,954
Other comprehensive (loss) income, net of tax:
Foreign currency translation		(8,404	)		1,167
Net change with respect to derivative instruments and hedging activities, net of tax of $274 in 2015 and $590 in 2014		(198	)		(1,116	)
Net actuarial loss on pension and postretirement obligations, net of tax of $(501) in 2015 and $28 in 2014		1,416			3
Other, net		(27	)		(15	)
Total other comprehensive (loss) income		(7,213	)		39
Comprehensive income		15,127			24,993
Comprehensive loss (income) attributable to noncontrolling interest		345			(253	)
Comprehensive income attributable to Mueller Industries, Inc.	$	15,472		$	24,740
See accompanying notes to condensed consolidated financial statements.

4

MUELLER INDUSTRIES, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

(Unaudited)

(In thousands, except share data)	March 28, 2015			December 27, 2014
Assets
Current assets:
Cash and cash equivalents	$	326,894		$	352,134
Accounts receivable, less allowance for doubtful accounts of $565 in 2015 and $666 in 2014		307,984			275,065
Inventories		246,395			256,585
Other current assets		59,858			57,429
Total current assets		941,131			941,213
Property, plant, and equipment, net		244,909			245,910
Goodwill		102,582			102,909
Other assets		36,208			38,064
Total assets	$	1,324,830		$	1,328,096
Liabilities
Current liabilities:
Current portion of debt	$	31,676		$	36,194
Accounts payable		100,813			100,735
Accrued wages and other employee costs		30,070			41,595
Other current liabilities		61,601			59,545
Total current liabilities		224,160			238,069
Long-term debt, less current portion		205,000			205,250
Pension liabilities		18,461			20,070
Postretirement benefits other than pensions		21,368			21,486
Environmental reserves		21,832			21,842
Deferred income taxes		23,100			24,556
Other noncurrent liabilities		3,107			1,389
Total liabilities		517,028			532,662
Equity
Mueller Industries, Inc. stockholders’ equity:
Preferred stock - $1.00 par value; shares authorized 5,000,000; none outstanding		—			—
Common stock - $.01 par value; shares authorized 100,000,000; issued 80,183,004; outstanding 56,943,098 in 2015 and 56,901,445 in 2014		802			802
Additional paid-in capital		269,636			268,575
Retained earnings		1,010,505			992,798
Accumulated other comprehensive loss		(49,429	)		(42,923	)
Treasury common stock, at cost		(456,651	)		(457,102	)
Total Mueller Industries, Inc. stockholders’ equity		774,863			762,150
Noncontrolling interest		32,939			33,284
Total equity		807,802			795,434
Commitments and contingencies		—			—
Total liabilities and equity	$	1,324,830		$	1,328,096
See accompanying notes to condensed consolidated financial statements.

5

MUELLER INDUSTRIES, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited)

	For the Quarter Ended
(In thousands)	March 28, 2015			March 29, 2014
Cash flows from operating activities
Consolidated net income	$	22,340		$	24,954
Reconciliation of consolidated net income to net cash provided by (used in) operating activities:
Depreciation and amortization		8,015			8,165
Stock-based compensation expense		1,349			1,194
Loss (gain) on disposal of properties		1			(1,413	)
Deferred income taxes		(570	)		(1,484	)
Income tax benefit from exercise of stock options		(69	)		(156	)
Changes in assets and liabilities, net of business acquired:
Receivables		(36,692	)		(49,482	)
Inventories		7,534			(10,055	)
Other assets		9,257			(14,467	)
Current liabilities		(7,389	)		(1,337	)
Other liabilities		(131	)		(989	)
Other, net		245			398
Net cash provided by (used in) operating activities		3,890			(44,672	)
Cash flows from investing activities
Acquisition of business		—			(30,137	)
Capital expenditures		(7,392	)		(9,199	)
Net (deposits into) withdrawals from restricted cash		(12,593	)		1,771
Proceeds from the sale of assets		492			4,833
Net cash used in investing activities		(19,493	)		(32,732	)
Cash flows from financing activities
Repayments of long-term debt		(250	)		(250	)
Dividends paid to stockholders of Mueller Industries, Inc.		(4,216	)		(4,196	)
Repayment of debt by joint venture, net		(3,817	)		(1,407	)
Issuance of debt		—			4,373
Net cash received to settle stock-based awards		93			224
Income tax benefit from exercise of stock options		69			156
Net cash used in financing activities		(8,121	)		(1,100	)
Effect of exchange rate changes on cash		(1,516	)		179
Decrease in cash and cash equivalents		(25,240	)		(78,325	)
Cash and cash equivalents at the beginning of the period		352,134			311,800
Cash and cash equivalents at the end of the period	$	326,894		$	233,475
See accompanying notes to condensed consolidated financial statements.

6

MUELLER INDUSTRIES, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

General

Certain information and footnote disclosures normally included in annual financial statements prepared in accordance with accounting principles generally accepted in the United States have been condensed or omitted.  Results of operations for the interim periods presented are not necessarily indicative of results which may be expected for any other interim period or for the year as a whole.  This Quarterly Report on Form 10-Q should be read in conjunction with the Company’s Annual Report on Form 10-K, including the annual financial statements incorporated therein.

The accompanying unaudited interim financial statements include all normal recurring adjustments which are, in the opinion of management, necessary for a fair presentation of the results for the interim periods included herein.  

Note 1 – Earnings per Common Share

Basic per share amounts have been computed based on the average number of common shares outstanding.  Diluted per share amounts reflect the increase in average common shares outstanding that would result from the assumed exercise of outstanding stock options and vesting of restricted stock awards, computed using the treasury stock method.  Approximately 180 thousand stock-based awards were excluded from the computation of diluted earnings per share for the quarter ended March 28, 2015 because they were antidilutive.

Note 2 – Commitments and Contingencies

The Company is involved in certain litigation as a result of claims that arose in the ordinary course of business, which management believes will not have a material adverse effect on the Company’s financial position, results of operations, or cash flows.  The Company may also realize the benefit of certain legal claims and litigation in the future; these gain contingencies are not recognized in the Condensed Consolidated Financial Statements.

United States Department of Commerce Antidumping Review

On December 23, 2009, the Department of Commerce (DOC) initiated an antidumping administrative review of the antidumping duty order covering circular welded non-alloy steel pipe and tube from Mexico for the November 1, 2008  through October 31, 2009 period of review.  The DOC selected Mueller Comercial de Mexico, S. de R.L. de C.V. (Mueller Comercial) as a respondent in the review.  On June 21, 2011, the DOC published the final results of the review and assigned Mueller Comercial an antidumping duty rate of 19.8 percent.  On August 22, 2011, the Company appealed the final results to the U.S. Court of International Trade (CIT).  On December 21, 2012, the CIT issued a decision upholding the DOC’s final results in part.  The CIT issued its final judgment on May 2, 2013. On May 6, 2013, the Company appealed the CIT decision to the U.S. Court of Appeals for the Federal Circuit (Federal Circuit).  On May 29, 2014, the Federal Circuit issued its decision vacating the CIT’s decision and remanding the case back to the DOC to reconsider the Company’s rate.  The Company and the United States have reached an agreement to settle the appeal.  In accordance with that agreement, on February 18, 2015, the DOC published the amended final results of the review and assigned Mueller Comercial an amended antidumping rate of 13.70 percent.  The Company anticipates that certain of its subsidiaries will incur antidumping duties on subject imports made during the period of review and, as such, has previously established a reserve of approximately $1.1 million for this matter.

Subsequent to October 31, 2009, Mueller Comercial did not ship subject merchandise to the United States.  Therefore, there is zero antidumping duty liability for periods of review after October 31, 2009.

Guarantees

Guarantees, in the form of letters of credit, are issued by the Company generally to assure the payment of insurance deductibles and certain retiree health benefits.  The terms of the Company’s guarantees are generally one year but are renewable annually as required.  These letters are primarily backed by the Company’s revolving credit facility.  The maximum payments that the Company could be required to make under its guarantees at March 28, 2015 were $10.2 million.

7

Note 3 – Inventories

(In thousands)	March 28, 2015			December 27, 2014
Raw materials and supplies	$	53,327		$	53,586
Work-in-process		30,912			39,707
Finished goods		167,033			168,481
Valuation reserves		(4,877	)		(5,189	)
Inventories	$	246,395		$	256,585

Note 4 – Industry Segments

The Company’s reportable segments are Plumbing & Refrigeration and Original Equipment Manufacturers (OEM).  For disclosure purposes, as permitted under Accounting Standards Codification (ASC) 280, Segment Reporting, certain operating segments are aggregated into reportable segments.  The Plumbing & Refrigeration segment is composed of Standard Products (SPD), European Operations, and Mexican Operations.  The OEM segment is composed of Industrial Products (IPD), Engineered Products (EPD), and Jiangsu Mueller–Xingrong Copper Industries Limited (Mueller-Xingrong).  These segments are classified primarily by the markets for their products.  Performance of segments is generally evaluated by their operating income.  

SPD manufactures copper tube and fittings, plastic fittings, and line sets.  These products are manufactured in the U.S.  SPD also imports and resells brass and plastic plumbing valves, malleable iron fittings, faucets, and plumbing specialty products.  Outside the U.S., the Company’s European Operations manufacture copper tube, which is sold primarily in Europe.  Mexican Operations consist of pipe nipple manufacturing and import distribution businesses including product lines of malleable iron fittings and other plumbing specialties.  The Plumbing & Refrigeration segment’s products are sold primarily to plumbing, refrigeration, and air-conditioning wholesalers, hardware wholesalers and co-ops, and building product retailers. For the quarter ended March 29, 2014, cost of goods sold included a decrease in accruals related to import duties of $3.1 million.

IPD manufactures brass rod, impact extrusions, and forgings, as well as a wide variety of end products including plumbing brass, automotive components, valves, and fittings.  EPD manufactures and fabricates valves and assemblies primarily for the refrigeration, air-conditioning, gas appliance, and barbecue grill markets and specialty copper, copper-alloy, and aluminum tube.  Mueller-Xingrong manufactures engineered copper tube primarily for air-conditioning applications.  These products are sold primarily to OEM customers.

8

Summarized segment information is as follows:

	For the Quarter Ended March 28, 2015
(In thousands)	Plumbing & Refrigeration Segment		OEM Segment		Corporate and Eliminations			Total
Net sales	$	305,017	$	235,317	$	(3,092	)	$	537,242
Cost of goods sold		260,463		203,433		(3,062	)		460,834
Depreciation and amortization		4,523		2,855		475			7,853
Selling, general, and administrative expense		20,540		6,481		5,810			32,831
Operating income		19,491		22,548		(6,315	)		35,724
Interest expense									(2,076	)
Other income, net									105
Income before income taxes								$	33,753

	For the Quarter Ended March 29, 2014
(In thousands)	Plumbing & Refrigeration Segment		OEM Segment		Corporate and Eliminations			Total
Net sales	$	338,027	$	240,030	$	(3,683	)	$	574,374
Cost of goods sold		289,025		210,403		(3,651	)		495,777
Depreciation and amortization		4,420		3,083		604			8,107
Selling, general, and administrative expense		20,697		5,258		6,228			32,183
Operating income		23,885		21,286		(6,864	)		38,307
Interest expense									(1,026	)
Other income, net									88
Income before income taxes								$	37,369

9

Note 5 –Benefits Plans

The Company sponsors several qualified and nonqualified pension plans and other postretirement benefit plans for certain of its employees.  The components of net periodic benefit cost (income) are as follows:

	For the Quarter Ended
(In thousands)	March 28, 2015			March 29, 2014
Pension benefits:
Service cost	$	272		$	222
Interest cost		2,054			2,068
Expected return on plan assets		(2,654	)		(3,201	)
Amortization of net loss		714			188
Net periodic benefit cost (income)	$	386		$	(723	)
Other benefits:
Service cost	$	96		$	89
Interest cost		196			177
Amortization of prior service cost		2			—
Amortization of net loss (gain)		3			(64	)
Net periodic benefit cost	$	297		$	202

Note 6 – Income Taxes

The Company’s effective tax rate for the first quarter of 2015 was 34 percent compared with 33 percent for the same period last year.  The difference between the effective tax rate and the amount computed using the U.S. federal statutory tax rate for the first quarter of 2015 was primarily attributable to reductions for the U.S. production activities deduction of $1.0 million and the effect of foreign tax rates lower than statutory tax rates of $0.5 million.  These items were partially offset by the provision for state income taxes, net of the federal benefit, of $0.8 million.

For the first quarter of 2014, the difference between the effective tax rate and what would be computed using the U.S. federal statutory tax rate was attributable to reductions related to the U.S. production activities deduction of $1.2 million and decreases in valuation allowances of $0.9 million. These items were partially offset by the provision for state income taxes, net of the federal benefit, of $1.3 million.

The Company files a consolidated U.S. federal income tax return and numerous consolidated and separate-company income tax returns in many state, local, and foreign jurisdictions.  The statute of limitations is open for the Company’s federal tax return and most state income tax returns for 2011 and all subsequent years and is open for certain state and foreign returns for earlier tax years due to ongoing audits and differing statute periods.  The Internal Revenue Service has audited the 2012 federal income tax return, the results of which were immaterial to the Company’s financial position, results of operations, and cash flows.  While the Company believes that it is adequately reserved for possible future audit adjustments, the final resolution of these examinations cannot be determined with certainty and could result in final settlements that differ from current estimates.

Note 7 – Derivative Instruments and Hedging Activities

The Company’s earnings and cash flows are subject to fluctuations due to changes in commodity prices, foreign currency exchange rates, and interest rates. The Company uses derivative instruments such as commodity futures contracts, foreign currency forward contracts, and interest rate swaps to manage these exposures.

10

All derivatives are recognized in the Condensed Consolidated Balance Sheets at their fair value. On the date the derivative contract is entered into, it is designated as (i) a hedge of a forecasted transaction or the variability of cash flow to be paid (cash flow hedge), or (ii) a hedge of the fair value of a recognized asset or liability (fair value hedge). Changes in the fair value of a derivative that is qualified, designated and highly effective as a cash flow hedge are recorded in accumulated other comprehensive income (AOCI), to the extent effective, until they are reclassified to earnings in the same period or periods during which the hedged transaction affects earnings. Changes in the fair value of a derivative that is qualified, designated and highly effective as a fair value hedge, along with the gain or loss on the hedged recognized asset or liability that is attributable to the hedged risk, are recorded in current earnings.  Changes in the fair value of undesignated derivative instruments and the ineffective portion of designated derivative instruments are reported in current earnings.

The Company documents all relationships between hedging instruments and hedged items, as well as the risk-management objective and strategy for undertaking various hedge transactions. This process includes linking all derivatives that are designated as fair value hedges to specific assets and liabilities in the Condensed Consolidated Balance Sheets and linking cash flow hedges to specific forecasted transactions or variability of cash flow.

The Company also assesses, both at the hedge’s inception and on an ongoing basis, whether the designated derivatives that are used in hedging transactions are highly effective in offsetting changes in cash flow or fair values of hedged items.  When a derivative is determined not to be highly effective as a hedge or the underlying hedged transaction is no longer probable of occurring, hedge accounting is discontinued prospectively, in accordance with the derecognition criteria for hedge accounting.

Commodity Futures Contracts

Copper and brass represent the largest component of the Company’s variable costs of production.  The cost of these materials is subject to global market fluctuations caused by factors beyond the Company’s control.  The Company occasionally enters into forward fixed-price arrangements with certain customers; the risk of these arrangements is generally managed with commodity futures contracts.   These futures contracts have been designated as cash flow hedges.  

At March 28, 2015, the Company held open futures contracts to purchase approximately $32.4 million of copper over the next nine months related to fixed price sales orders.  The fair value of those futures contracts was a $354 thousand net gain position, which was determined by obtaining quoted market prices (Level 1 hierarchy as defined by ASC 820, Fair Value Measurements and Disclosures (ASC 820)). In the next twelve months, the Company will reclassify into earnings realized gains or losses relating to cash flow hedges. At March 28, 2015, this amount was approximately $317 thousand of deferred net gains, net of tax.

The Company may also enter into futures contracts to protect the value of inventory against market fluctuations.   These futures contracts have been designated as fair value hedges.  

At March 28, 2015, the Company held open futures contracts to sell approximately $20.1 million of copper over the next four months related to copper inventory. The fair value of those futures contracts was a $181 thousand gain position, which was determined by obtaining quoted market prices (Level 1 hierarchy as defined by ASC 820).  

Foreign Currency Forward Contracts

The Company has entered into certain contracts to purchase heavy machinery and equipment denominated in euros. In anticipation of entering into these contracts, the Company entered into forward contracts to purchase euros to protect itself against adverse foreign exchange rate fluctuations.  

At March 28, 2015, the Company held open forward contracts to purchase approximately 326 thousand euros over the next four months.  The fair value of these contracts, which was determined by obtaining quoted market prices (Level 1 hierarchy as defined by ASC 820), was a $9 thousand loss position. At March 28, 2015, there was $101 thousand of deferred gains, net of tax, included in AOCI that are expected to be reclassified into depreciation expense over the useful life of the heavy machinery and equipment.

11

Interest Rate Swap

On February 20, 2013, the Company entered into a two-year forward-starting interest rate swap agreement with an effective date of January 12, 2015, and an underlying notional amount of $200.0 million, pursuant to which the Company receives variable interest payments based on one-month LIBOR and pays fixed interest at a rate of 1.4 percent.  Based on the Company’s current variable premium pricing on its Term Loan Facility, the all-in fixed rate on the effective date was 2.7 percent.  The interest rate swap will mature on December 11, 2017, and is structured to offset the interest rate risk associated with the Company’s floating-rate, LIBOR-based Term Loan Facility Agreement.  The swap was designated and accounted for as a cash flow hedge from inception.

The fair value of the interest rate swap is estimated based on the present value of the difference between expected cash flows calculated at the contracted interest rate and the expected cash flows at the current market interest rate using observable benchmarks for LIBOR forward rates at the end of the period (Level 2 hierarchy as defined by ASC 820).  Interest payable and receivable under the swap agreement is accrued and recorded as an adjustment to interest expense.  The fair value of the interest rate swap was a $2.4 million loss position at March 28, 2015, and there was $1.6 million of deferred net losses, net of tax, included in AOCI that are expected to be reclassified into interest expense over the term of the hedged item.

We present our derivative assets and liabilities in our Condensed Consolidated Balance Sheets on a net basis by counterparty. The following table summarizes the location and fair value of the derivative instruments and disaggregates our net derivative assets and liabilities into gross components on a contract-by-contract basis:

	Asset Derivatives							Liability Derivatives
		Fair Value							Fair Value
(In thousands)	Balance Sheet Location	March 28, 2015			December 27, 2014			Balance Sheet Location	March 28, 2015			December 27, 2014
Hedging instrument:
Commodity contracts - gains	Other current assets	$	941		$	99		Other current liabilities	$	310		$	15
Commodity contracts - losses	Other current assets		(102	)		(4	)	Other current liabilities		(614	)		(832	)
Foreign currency contracts	Other current assets		—			—		Other current liabilities		(9	)		(81	)
Interest rate swap	Other assets		—			—		Other liabilities		(2,436	)		(927	)
Total derivatives (1)		$	839		$	95			$	(2,749	)	$	(1,825	)
(1) Does not include the impact of cash collateral provided to counterparties.

The following tables summarize the effects of derivative instruments in our Condensed Consolidated Statements of Income:

		Three Months Ended
(In thousands)	Location	March 28, 2015			March 29, 2014
Fair value hedges:
Gain on commodity contracts (qualifying)	Cost of goods sold	$	213		$	6,291
Loss on hedged item - Inventory	Cost of goods sold		(247	)		(5,800	)
Undesignated derivatives:
Gain on commodity contracts (nonqualifying)	Cost of goods sold	$	234		$	1,538

12

The following tables summarize amounts recognized in and reclassified from AOCI during the period:

	Three Months Ended March 28, 2015
(In thousands)	Gain (Loss) Recognized in AOCI (Effective Portion), Net of Tax			Classification Gains (Losses)		Loss (Gain) Reclassified from AOCI (Effective Portion), Net of Tax
Cash flow hedges:
Commodity contracts	$	274		Cost of goods sold	$	571
Foreign currency contracts		(55	)	Depreciation expense		—
Interest rate swap		(1,032	)	Interest expense		68

	Three Months Ended March 29, 2014
(In thousands)	(Loss) Gain Recognized in AOCI (Effective Portion), Net of Tax			Classification Gains (Losses)		Loss (Gain) Reclassified from AOCI (Effective Portion), Net of Tax
Cash flow hedges:
Commodity contracts	$	(1,010	)	Cost of goods sold	$	291
Foreign currency contracts		22		Depreciation expense		(174	)
Interest rate swap		(245	)	Interest expense		—

The Company enters into futures and forward contracts that closely match the terms of the underlying transactions.  As a result, the ineffective portion of the open hedge contracts through March 28, 2015 was not material to the Condensed Consolidated Statements of Income.

The Company primarily enters into International Swaps and Derivatives Association (ISDA) master netting agreements with major financial institutions that permit the net settlement of amounts owed under their respective derivative contracts. Under these master netting agreements, net settlement generally permits the Company or the counterparty to determine the net amount payable for contracts due on the same date and in the same currency for similar types of derivative transactions. The master netting agreements generally also provide for net settlement of all outstanding contracts with a counterparty in the case of an event of default or a termination event.  The Company does not offset fair value amounts for derivative instruments and fair value amounts recognized for the right to reclaim cash collateral.  At March 28, 2015 and December 27, 2014, the Company had recorded restricted cash in other current assets of $1.7 million and $0.5 million, respectively, as collateral related to open derivative contracts under the master netting arrangements.

13

Note 8 – Accumulated Other Comprehensive Income

AOCI includes certain foreign currency translation adjustments from those subsidiaries not using the U.S. dollar as their functional currency, net deferred gains and losses on certain derivative instruments accounted for as cash flow hedges, adjustments to pension and OPEB liabilities, and unrealized gains and losses on marketable securities classified as available-for-sale.

The following table provides changes in AOCI by component, net of taxes and noncontrolling interest (amounts in parentheses indicate debits to AOCI):

	For the Quarter Ended March 28, 2015
(In thousands)	Cumulative Translation Adjustment			Unrealized (Losses)/Gains on Derivatives			Minimum Pension/OPEB Liability Adjustment			Unrealized Gains on Equity Investments			Total
Balance at December 27, 2014	$	(7,076	)	$	(953	)	$	(35,164	)	$	270		$	(42,923	)
Other comprehensive income (loss) before reclassifications		(7,697	)		(837	)		895			(27	)		(7,666	)
Amounts reclassified from accumulated OCI		—			639			521			—			1,160
Net current-period other comprehensive income		(7,697	)		(198	)		1,416			(27	)		(6,506	)
Balance at March 28, 2015	$	(14,773	)	$	(1,151	)	$	(33,748	)	$	243		$	(49,429	)

	For the Quarter Ended March 29, 2014
(In thousands)	Cumulative Translation Adjustment			Unrealized (Losses)/Gains on Derivatives			Minimum Pension/OPEB Liability Adjustment			Unrealized Gains on Equity Investments			Total
Balance at December 28, 2013	$	(462	)	$	1,546		$	(12,158	)	$	255		$	(10,819	)
Other comprehensive income (loss) before reclassifications		1,162			(1,233	)		(107	)		(15	)		(193	)
Amounts reclassified from accumulated OCI		—			117			110			—			227
Net current-period other comprehensive income		1,162			(1,116	)		3			(15	)		34
Balance at March 29, 2014	$	700		$	430		$	(12,155	)	$	240		$	(10,785	)

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Reclassification adjustments out of accumulated OCI were as follows:

	Amount reclassified from AOCI
	For the Quarter Ended
(In thousands)	March 28, 2015			March 29, 2014			Affected line item
Unrealized losses/(gains) on derivatives:
Commodity contracts	$	762		$	357		Cost of goods sold
Foreign currency contracts		—			(276	)	Depreciation Expense
Interest rate swap		106			—		Interest expense
		(229	)		36		Income tax (expense) benefit
		639			117		Net of tax
		—			—		Noncontrolling interest
	$	639		$	117		Net of tax and noncontrolling   interest
Amortization of net loss and prior service cost on employee benefit plans	$	719		$	124		Selling, general, and administrative   expense
		(198	)		(14	)	Income tax expense
		521			110		Net of tax
		—			—		Noncontrolling interest
	$	521		$	110		Net of tax and noncontrolling   interest

Note 9 – Acquisitions

On October 18, 2013, the Company entered into a definitive agreement with KME Yorkshire Limited to acquire certain assets and assume certain liabilities of its copper tube business.  Yorkshire Copper Tube (Yorkshire) produces European standard copper distribution tubes.  This transaction received regulatory approval in the United Kingdom on February 11, 2014 and closed on February 28, 2014.  The purchase price was approximately $30.1 million, paid in cash.  The acquisition of Yorkshire complements the Company’s existing copper tube businesses in the Plumbing & Refrigeration segment.  In 2012, Yorkshire had annual revenue of approximately $196.1 million.  During the third quarter of 2014, the purchase price allocation, including all fair value measurements, was finalized.  The fair value of the assets acquired totaled $20.7 million, consisting primarily of inventories of $17.6 million, property, plant, and equipment of $2.1 million, and other current assets of $1.0 million.  The fair value of the liabilities assumed totaled $15.6 million, consisting primarily of accounts payable and accrued expenses of $15.2 million and other current liabilities of $0.4 million.  Of the remaining purchase price, $8.1 million was allocated to tax-deductible goodwill and $16.9 million was allocated to other intangible assets.

The Company expects to recognize approximately $2.7 million of severance costs related to the reorganization of Yorkshire during the remainder of 2015.

On March 30, 2015, subsequent to the end of the first quarter, the Company entered into a Stock Purchase Agreement with Turbotec Products, Inc. (Turbotec) providing for the purchase of all of the outstanding capital stock of Turbotec for approximately $14.2 million in cash, net of working capital adjustments. Turbotec manufactures coaxial heat exchangers and twisted tubes for the HVAC, geothermal, refrigeration, swimming pool heat pump, marine, ice machine, commercial boiler, and heat reclamation markets.  The acquisition of Turbotec complements the Company’s existing refrigeration business, a component of the OEM segment.  For the twelve months ended March 31, 2015, Turbotec’s net sales were approximately $21.8 million.

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Note 10 – Recently Issued Accounting Standards

In May 2014, the Financial Accounting Standards Board issued Accounting Standards Update (ASU) No. 2014-09, Revenue from Contracts with Customers (Topic 606) (ASU 2014-09).  The ASU will supersede virtually all existing revenue recognition guidance under U.S. GAAP and will be effective for annual reporting periods beginning after December 15, 2016.  The fundamental principles of the new guidance are that companies should recognize revenue in a manner that reflects the timing of the transfer of services to customers and the amount of revenue recognized reflects the consideration that a company expects to receive for the goods and services provided.  The new guidance establishes a five-step approach for the recognition of revenue.  The Company is in the process of evaluating the impact of ASU 2014-09 on its Consolidated Financial Statements.

Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

General Overview

We are a leading manufacturer of plumbing, HVAC, refrigeration, and industrial products.  The range of these products is broad:  copper tube and fittings; brass and copper alloy rod, bar, and shapes; aluminum and brass forgings; aluminum and copper impact extrusions; plastic fittings and valves; refrigeration valves and fittings; fabricated tubular products; and steel nipples.  We also resell imported brass and plastic plumbing valves, malleable iron fittings, faucets and plumbing specialty products.  Mueller’s operations are located throughout the United States and in Canada, Mexico, Great Britain, and China.

The Company’s businesses are aggregated into two reportable segments:

● Plumbing & Refrigeration:  The Plumbing & Refrigeration segment is composed of SPD, European Operations, and Mexican Operations.  SPD manufactures and sells copper tube, copper and plastic fittings, line sets, and valves in North America and sources products for import distribution in North America.  European Operations manufacture copper tube in the United Kingdom, which is sold throughout Europe.  Mexican Operations consist of pipe nipple manufacturing and import distribution businesses including product lines of malleable iron fittings and other plumbing specialties.  The Plumbing & Refrigeration segment sells products to wholesalers in the HVAC, plumbing, and refrigeration markets, to distributors to the manufactured housing and recreational vehicle industries, and to building material retailers.

● OEM:  The OEM segment is composed of IPD, EPD, and Mueller-Xingrong, the Company’s Chinese joint venture.  The OEM segment manufactures and sells brass and copper alloy rod, bar, and shapes; aluminum and brass forgings; aluminum and copper impact extrusions; refrigeration valves and fittings; fabricated tubular products; and gas valves and assemblies.  Mueller-Xingrong manufactures engineered copper tube primarily for air-conditioning applications; these products are sold primarily to OEMs located in China.  The OEM segment sells its products primarily to original equipment manufacturers, many of which are in the HVAC, plumbing, and refrigeration markets.

New housing starts and commercial construction are important determinants of the Company’s sales to the HVAC, refrigeration, and plumbing markets because the principal end use of a significant portion of our products is in the construction of single and multi-family housing and commercial buildings.  Repairs and remodeling projects are also important drivers of underlying demand for these products.  

Residential construction activity in 2014 and into the first quarter of 2015 has shown improvement, but remains at levels below historical averages.  Continued improvement is expected, but may be tempered by continuing low labor participation rates, the pace of household formations, higher interest rates, and tighter lending standards.  Per the U.S. Census Bureau, the March 2015 seasonally adjusted annual rate of new housing starts was 0.9 million compared with the March 2014 rate of 1.0 million.  While mortgage rates have risen in 2015 and 2014, they remain at historically low levels, as the average 30-year fixed mortgage rate was 3.72 percent for the first three months of 2015 and 4.17 percent for the twelve months ended December 2014. 

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The private non-residential construction sector, which includes offices, industrial, health care and retail projects, began showing modest improvement in 2015 and 2014 after declines in previous years.  Per the U.S. Census Bureau, the actual (not seasonally adjusted) value of private non-residential construction put in place was $337.6 billion in 2014 compared to $304.9 billion in 2013.  The seasonally adjusted annual value of private non-residential construction put in place was $348.4 billion in February 2015 compared to the December 2014 rate of $354.8 billion and the February 2014 rate of $328.9 billion.  The Company expects that most of these conditions will gradually improve, but at an irregular pace.

Profitability of certain of the Company’s product lines depends upon the “spreads” between the cost of raw material and the selling prices of its products.  The open market prices for copper cathode and scrap, for example, influence the selling price of copper tube, a principal product manufactured by the Company.  The Company attempts to minimize the effects on profitability from fluctuations in material costs by passing through these costs to its customers.  The Company’s earnings and cash flow are dependent upon these spreads that fluctuate based upon market conditions.

Earnings and profitability are also impacted by unit volumes that are subject to market trends, such as substitute products, imports, technologies, and market share.  In core product lines, the Company intensively manages its pricing structure while attempting to maximize its profitability.  From time-to-time, this practice results in lost sales opportunities and lower volume.  For plumbing systems, plastics are the primary substitute product; these products represent an increasing share of consumption.  U.S. consumption of copper tube is still predominantly supplied by U.S. manufacturers.  For certain air-conditioning and refrigeration applications, aluminum based systems are the primary substitution threat.  The Company cannot predict the acceptance or the rate of switching that may occur.  In recent years, brass rod consumption in the U.S. has declined due to the outsourcing of many manufactured products from offshore regions.

Results of Operations

Consolidated Results

The following table compares summary operating results for the first quarter of 2015 and 2014:

	Three Months Ended				Percent Change
(In thousands)	March 28, 2015		March 29, 2014		2015 vs. 2014
Net sales	$	537,242	$	574,374		(6.5	)%
Operating income		35,724		38,307		(6.7	)
Net income		21,978		24,706		(11.0	)

The following are components of changes in net sales compared to the prior year:

	2015 vs. 2014
Net selling price in core product lines		(9.1	)%
Unit sales volume in core product lines		5.5
Dispositions		(2.8	)
Other		(0.1	)
		(6.5	)%

The decrease in net sales was primarily due to (i) lower net selling prices of $52.2 million in our core product lines, primarily copper tube and brass rod, and (ii) the absence of sales of $15.9 million recorded by Primaflow, a business we sold during November 2014.  These decreases were offset by higher unit sales volume of $34.3 million in the Company’s core products.

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Net selling prices generally fluctuate with changes in raw material costs.  Changes in raw material costs are generally passed through to customers by adjustments to selling prices.  The following graph shows the Comex average copper price per pound by quarter for the current and prior fiscal years:

The following tables compare operating expenses as dollar amounts and as a percent of net sales for the first quarter of 2015 and 2014:

	Three Months Ended
(In thousands)	March 28, 2015		March 29, 2014
Cost of goods sold	$	460,834	$	495,777
Depreciation and amortization		7,853		8,107
Selling, general, and administrative expense		32,831		32,183
Operating expenses	$	501,518	$	536,067

	Three Months Ended
	March 28, 2015			March 29, 2014
Cost of goods sold		85.8	%		86.3	%
Depreciation and amortization		1.5			1.4
Selling, general, and administrative expense		6.1			5.6
Operating expenses		93.4	%		93.3	%

The decrease in cost of goods sold was primarily due to the decrease in the average cost of copper, our principal raw material, offset by an increase in sales volume.  In addition, during the first quarter of 2014 we recognized a decrease in accruals related to import duties of $3.1 million that positively impacted cost of goods sold.  Depreciation and amortization for the first quarter of 2015 was consistent with the expense recorded for the first quarter of 2014.  Selling, general, and administrative expenses increased slightly for the first quarter of 2015, primarily due to the absence of the $1.4 million gain recorded in the first quarter of 2014 on the sale of the land and building in Portage, Michigan and higher net periodic pension costs of $0.6 million.  This was offset by a decrease in other employment costs primarily related to the sale of Primaflow.

Interest expense increased in the first quarter of 2015 primarily as a result of (i) additional costs of $0.5 million due to the terms of our interest rate swap agreement that became effective in January 2015, and (ii) increased borrowing costs of $0.5 million at Mueller-Xingrong to fund working capital.  Other income, net, for the first quarter of 2015 was consistent with the first quarter of 2014.  

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Our effective tax rate for the first quarter of 2015 was 34 percent compared with 33 percent for the same period last year.  Factors that explain the difference between the effective tax rate and what would be computed using the U.S. federal statutory tax rate for the first quarter of 2015 were reductions related to the U.S. production activities deduction of $1.0 million and the effect of foreign tax rates lower than statutory rates of $0.5 million.  These items were partially offset by the provision for state income taxes, net of the federal benefit, of $0.8 million.

Plumbing & Refrigeration Segment

The following table compares summary operating results for the first quarter of 2015 and 2014 for the businesses comprising our Plumbing & Refrigeration segment:

	Three Months Ended				Percent Change
(In thousands)	March 28, 2015		March 29, 2014		2015 vs. 2014
Net sales	$	305,017	$	338,027		(9.8	)%
Operating income		19,491		23,885		(18.4	)

The following are components of changes in net sales compared to the prior year:

	2015 vs. 2014
Net selling price in core product lines		(9.9	)%
Unit sales volume in core product lines		5.5
Dispositions		(4.8	)
Other		(0.6	)
		(9.8	)%

The decrease in net sales was primarily due to (i) lower net selling prices of $33.0 million in the segment’s core product lines, primarily copper tube, and (ii) the absence of sales of $15.9 million recorded by Primaflow, disposed of during November 2014.  These decreases were offset by higher unit sales volume of $18.3 million in the segment’s core products.

The following tables compare operating expenses as dollar amounts and as a percent of net sales for the first quarter of 2015 and 2014:

	Three Months Ended
(In thousands)	March 28, 2015		March 29, 2014
Cost of goods sold	$	260,463	$	289,025
Depreciation and amortization		4,523		4,420
Selling, general, and administrative expense		20,540		20,697
Operating expenses	$	285,526	$	314,142

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	Three Months Ended
	March 28, 2015			March 29, 2014
Cost of goods sold		85.4	%		85.5	%
Depreciation and amortization		1.5			1.3
Selling, general, and administrative expense		6.7			6.1
Operating expenses		93.6	%		92.9	%

The decrease in cost of goods sold was primarily due to the decrease in the average cost of raw materials, primarily copper, offset by an increase in sales volume.  In addition, during the first quarter of 2014 we recognized a decrease in accruals related to import duties of $3.1 million that positively impacted cost of goods sold.  Depreciation and amortization increased slightly as a result of depreciation and amortization of businesses acquired.  Selling, general, and administrative expenses for the first quarter of 2015 was consistent with the expense recorded for the first quarter of 2014.  In the first quarter of 2014, we recorded a $1.4 million gain on the sale of the land and building in Portage, Michigan, which was offset by lower employment costs in the first quarter of 2015 primarily due to the sale of Primaflow.

OEM Segment

The following table compares summary operating results for the first quarter of 2015 and 2014 for the businesses comprising our OEM segment:

	Three Months Ended				Percent Change
(In thousands)	March 28, 2015		March 29, 2014		2015 vs. 2014
Net sales	$	235,317	$	240,030		(2.0	)%
Operating income		22,548		21,286		5.9

The following are components of changes in net sales compared to the prior year:

	2015 vs. 2014
Net selling price in core product lines		(8.0	)%
Unit sales volume in core product lines		5.7
Other		0.3
		(2.0	)%

The decrease in net sales was primarily due to lower net selling prices of $19.2 million in the segment’s core product lines, primarily brass rod. This was offset by an increase in unit sales volume of $16.0 million in the segment’s core product lines, primarily the segment’s Chinese joint venture.

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The following tables compare operating expenses as dollar amounts and as a percent of net sales for the first quarter of 2015 and 2014:

	Three Months Ended
(In thousands)	March 28, 2015		March 29, 2014
Cost of goods sold	$	203,433	$	210,403
Depreciation and amortization		2,855		3,083
Selling, general, and administrative expense		6,481		5,258
Operating expenses	$	212,769	$	218,744

	Three Months Ended
	March 28, 2015			March 29, 2014
Cost of goods sold		86.5	%		87.7	%
Depreciation and amortization		1.2			1.3
Selling, general, and administrative expense		2.7			2.1
Operating expenses		90.4	%		91.1	%

The decrease in cost of goods sold was related to factors consistent with those noted regarding changes in net sales.  Depreciation and amortization decreased as a result of several fixed assets becoming fully depreciated.  Selling, general, and administrative expenses increased primarily as a result of higher net periodic pension costs of $0.5 million and other employment costs of $0.4 million.  

Liquidity and Capital Resources

The following table presents selected financial information for the first quarter of 2015 and 2014:

(In thousands)	2015			2014
Cash and cash equivalents	$	326,894		$	233,475
Property, plant, and equipment, net		244,909			243,905
Total debt		236,676			238,085
Working capital, net of cash and current debt		421,753			448,392
Cash provided by (used in) operating activities		3,890			(44,672	)
Cash used in investing activities		(19,493	)		(32,732	)
Cash used in financing activities		(8,121	)		(1,100	)

Management believes that cash provided by operations, funds available under the credit agreement, and cash on hand of $326.9 million will be adequate to meet the Company’s normal future capital expenditure and operational needs.  Our current ratio (current assets divided by current liabilities) was 4.2 to 1 as of March 28, 2015.

The Company has significant environmental remediation obligations expected to occur over future years.  Cash used for environmental remediation activities was approximately $0.3 million during the first three months of 2015.  We expect to spend approximately $0.6 million for the remainder of 2015 for ongoing environmental remediation activities.  The timing of a potential payment for a $9.5 million settlement offer related to the Southeast Kansas Sites has not yet been determined.

Our Board of Directors declared and paid a quarterly cash dividend of 7.5 cents per common share in the first quarter of 2015 and 2014.  Payment of dividends in the future is dependent upon the Company’s financial condition, cash flows, capital requirements, earnings, and other factors.  

On March 30, 2015, the Company entered into a Stock Purchase Agreement with Turbotec Products, Inc. (Turbotec) providing for the purchase of  all of the outstanding capital stock of Turbotec for approximately $14.2 million in cash, net of working capital adjustments.

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Cash Provided by Operating Activities

During the three months ended March 28, 2015, cash provided by operating activities was primarily attributable to consolidated net income of $22.3 million, depreciation and amortization of $8.0 million, decreased other assets of $9.3 million, and decreased inventories of $7.5 million, partially offset by increased receivables of $36.7 million and decreased current liabilities of $7.4 million.  These fluctuations are primarily due to a net increase in working capital needs related to higher sales at the end of the first quarter.

During the three months ended March 29, 2014, cash used in operating activities was primarily attributable to increased receivables of $49.5 million, other assets of $14.5 million, and inventories of $10.1 million, partially offset by consolidated net income of $25.0 million plus depreciation and amortization of $8.2 million.  The fluctuations in receivables, other assets, and inventories are primarily due to increased sales volume in certain businesses in the first quarter of 2014.

Cash Used in Investing Activities

The major components of net cash used in investing activities in the first three months of 2015 included net deposits into restricted cash balances of $12.6 million and capital expenditures of $7.4 million.

The major components of net cash used in investing activities in the first three months of 2014 included $30.1 million for the acquisition of Yorkshire and capital expenditures of $9.2 million, offset by $4.8 million in proceeds from the sale of properties and net withdrawals from restricted cash balances of $1.8 million.

Cash Used in Financing Activities

For the first quarter of 2015, net cash used in financing activities consisted primarily of $4.2 million used for payment of regular quarterly dividends to stockholders of the Company and $3.8 million used for the repayment of debt by Mueller-Xingrong.

For the first quarter of 2014, net cash used in financing activities consisted primarily of $4.2 million used for payment of regular quarterly dividends to stockholders of the Company and $1.4 million used for the repayment of debt by Mueller-Xingrong, partially offset by $4.4 million received for the issuance of debt by Mueller Europe, Limited (MEL).

Debt

The Company’s credit agreement provides for an unsecured $200.0 million revolving credit facility (the Revolving Credit Facility) and a $200.0 million Term Loan Facility, both maturing on December 11, 2017.  The Revolving Credit Facility backed approximately $10.2 million in letters of credit at the end of the quarter.  

On February 2, 2015, Mueller-Xingrong entered into a new secured revolving credit agreement with a total borrowing capacity of RMB 230 million (or approximately $37.0 million).  In addition, Mueller-Xingrong occasionally finances working capital through various accounts receivable and bank draft discount arrangements.  Total borrowings at Mueller-Xingrong were $30.7 million as of  March 28, 2015.

As of March 28, 2015, the Company’s total debt was $236.7 million or 22.7 percent of its total capitalization.

Covenants contained in the Company’s financing obligations require, among other things, the maintenance of minimum levels of tangible net worth and the satisfaction of certain minimum financial ratios.  As of March 28, 2015, the Company was in compliance with all of its debt covenants.

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Share Repurchase Program

The Company’s Board of Directors has extended, until October 2015, its authorization to repurchase up to 20 million shares of the Company’s common stock through open market transactions or through privately negotiated transactions.  The Company has no obligation to repurchase any shares and may cancel, suspend, or extend the time period for the repurchase of shares at any time.  Any repurchases will be funded primarily through existing cash and cash from operations.  The Company may hold any shares repurchased in treasury or use a portion of the repurchased shares for employee benefit plans, as well as for other corporate purposes.  From its initial authorization in 1999 through March 28, 2015, the Company had repurchased approximately 4.7 million shares under this authorization.  

Contractual Cash Obligations

There have been no significant changes in the Company’s contractual cash obligations reported at December 27, 2014.

Item 3. Quantitative and Qualitative Disclosures About Market Risk

The Company is exposed to market risk from changes in raw material and energy costs, interest rates, and foreign currency exchange rates.  To reduce such risks, the Company may periodically use financial instruments.  Hedging transactions are authorized and executed pursuant to policies and procedures.  Further, the Company does not buy or sell financial instruments for trading purposes.

Cost and Availability of Raw Materials and Energy

Raw materials, primarily copper and brass, represent the largest component of the Company’s variable costs of production.  The cost of these materials is subject to global market fluctuations caused by factors beyond our control.  Significant increases in the cost of metal, to the extent not reflected in prices for our finished products, or the lack of availability could materially and adversely affect the Company’s business, results of operations and financial condition.

The Company occasionally enters into forward fixed-price arrangements with certain customers.  We may utilize futures contracts to hedge risks associated with these forward fixed-price arrangements.  We may also utilize futures contracts to manage price risk associated with inventory.  Depending on the nature of the hedge, changes in the fair value of the futures contracts will either be offset against the change in fair value of the inventory through earnings or recognized as a component of accumulated other comprehensive income (AOCI) and reflected in earnings upon the sale of inventory.  Periodic value fluctuations of the contracts generally offset the value fluctuations of the underlying fixed-price transactions or inventory.  At quarter-end, the Company held open futures contracts to purchase approximately $32.4 million of copper over the next nine months related to fixed-price sales orders and to sell approximately $20.1 million of copper over the next four months related to copper inventory.

We may enter into futures contracts or forward fixed-price arrangements with certain vendors to manage price risk associated with natural gas purchases.  The effective portion of gains and losses with respect to futures positions are deferred in equity as a component of AOCI and reflected in earnings upon consumption of natural gas.  Periodic value fluctuations of the futures contracts generally offset the value fluctuations of the underlying natural gas prices.  There were no open futures contracts to purchase natural gas at March 28, 2015.

Interest Rates

At March 28, 2015, the Company had variable-rate debt outstanding of $236.7 million.  At these borrowing levels, a hypothetical 10 percent increase in interest rates would have had an insignificant unfavorable impact on the Company’s pretax earnings and cash flows.  The primary interest rate exposures on floating-rate debt are based on LIBOR, the base-lending rate published by the People’s Bank of China, and the base-lending rate published by HSBC.  There was no fixed rate debt outstanding as of March 28, 2015.

We have reduced our exposure to increases in LIBOR by entering into interest rate swap contracts. These contracts have been designated as cash flow hedges.  The fair value of these contracts has been recorded in the Condensed Consolidated Balance Sheets, and the related gains and losses on the contracts are deferred in stockholders’ equity as a component of AOCI.  Deferred gains or losses on the contracts are recognized in interest expense in the period in which the related interest payment being hedged is expensed.  The interest rate swap agreement had an effective date of January 12, 2015.

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Foreign Currency Exchange Rates

Foreign currency exposures arising from transactions include firm commitments and anticipated transactions denominated in a currency other than an entity’s functional currency.  The Company and its subsidiaries generally enter into transactions denominated in their respective functional currencies.  The Company may utilize certain futures or forward contracts with financial institutions to hedge foreign currency transactional exposures.  Gains and losses with respect to these positions are deferred in stockholders’ equity as a component of AOCI and reflected in earnings upon collection of receivables or payment of commitments.  At March 28, 2015, the Company had open forward contracts with a financial institution to sell approximately 4.2 million euros, 15.6 million Swedish kronor, and 6.1 million Norwegian kroner through June 2015.  It also held open forward contracts to buy approximately 0.3 million euros over the next four months.

The Company’s primary foreign currency exposure arises from foreign-denominated revenues and profits and their translation into U.S. dollars.  The primary currencies to which we are exposed include the Canadian dollar, the British pound sterling, the euro, the Mexican peso, and the Chinese renminbi.  The Company generally views as long-term its investments in foreign subsidiaries with a functional currency other than the U.S. dollar.  As a result, we generally do not hedge these net investments.

Cautionary Statement Regarding Forward Looking Information

Statements in this Quarterly Report on Form 10-Q that are not strictly historical may be “forward-looking” statements, which involve risks and uncertainties.  These include economic and currency conditions, continued availability of raw materials and energy, market demand, pricing, competitive and technological factors, and the availability of financing, among others, as set forth in the Company’s filings with the Securities and Exchange Commission (SEC).  The words “pro forma,” “outlook,” “estimate,” “project,” “intend,” “expect,” “believe,” “target,” “encourage,” “anticipate,” and similar expressions are intended to identify forward-looking statements.  The reader should not place undue reliance on forward-looking statements, which speak only as of the date of this report.  The Company has no obligation to publicly update or revise any forward-looking statements to reflect events after the date of this report.

Item 4. Controls and Procedures

Evaluation of Disclosure Controls and Procedures

The Company maintains disclosure controls and procedures designed to ensure information required to be disclosed in Company reports filed under the Securities Exchange Act of 1934, as amended (the Exchange Act), is recorded, processed, summarized, and reported within the time periods specified in the SEC’s rules and forms.  Disclosure controls and procedures are designed to provide reasonable assurance that information required to be disclosed in Company reports filed under the Exchange Act is accumulated and communicated to management, including the Company’s Chief Executive Officer and Chief Financial Officer, as appropriate, to allow timely decisions regarding required disclosure.

The Company’s management, with the participation of the Company’s Chief Executive Officer and Chief Financial Officer, has evaluated the effectiveness of the Company’s disclosure controls and procedures pursuant to Rule 13a-15(e) of the Exchange Act as of March 28, 2015.  Based on that evaluation, the Company’s Chief Executive Officer and Chief Financial Officer have concluded that the Company’s disclosure controls and procedures are effective as of March 28, 2015 to ensure that information required to be disclosed in Company reports filed under the Exchange Act is (i) recorded, processed, summarized and reported within the time periods specified in the SEC rules and forms and (ii) accumulated and communicated to management, including the Company’s principal executive officer and principal financial officer, as appropriate to allow timely decisions regarding required disclosure.

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Changes in Internal Control over Financial Reporting

There were no changes in the Company’s internal control over financial reporting during the Company’s fiscal quarter ending March 28, 2015, that have materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting.

PART II	OTHER INFORMATION
Item 1.	Legal Proceedings

General

The Company is involved in certain litigation as a result of claims that arose in the ordinary course of business.  Additionally, the Company may realize the benefit of certain legal claims and litigation in the future; these gain contingencies are not recognized in the Condensed Consolidated Financial Statements.

For a description of material pending legal proceedings, see “Note 2 – Commitments and Contingencies” in the Notes to Condensed Consolidated Financial Statements, which is incorporated herein by reference.

Item 1A. Risk Factors

The Company is exposed to risk as it operates its businesses.  To provide a framework to understand the operating environment of the Company, we have provided a brief explanation of the more significant risks associated with our businesses in our 2014 Annual Report on Form 10-K.  There have been no material changes in risk factors that were previously disclosed in our 2014 Annual Report on Form 10-K.

25

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

Issuer Purchases of Equity Securities

The Company’s Board of Directors has extended, until October 2015, its authorization to repurchase up to 20 million shares of the Company’s common stock through open market transactions or through privately negotiated transactions.  The Company has no obligation to repurchase any shares and may cancel, suspend, or extend the time period for the repurchase of shares at any time.  Any repurchases will be funded primarily through existing cash and cash from operations.  The Company may hold any shares repurchased in treasury or use a portion of the repurchased shares for employee benefit plans, as well as for other corporate purposes.  From its initial authorization in 1999 through March 28, 2015, the Company had repurchased approximately 4.7 million shares under this authorization.   Below is a summary of the Company’s stock repurchases for the period ended March 28, 2015.

	(a)		(b)		(c)	(d)
	Total Number of Shares Purchased		Average Price Paid per Share		Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs	Maximum Number of Shares That May Yet Be Purchased Under the Plans or Programs
							15,287,060	(1)
December 28, 2014 – January 24, 2015	—		$	—	—
January 25 – February 21, 2015	20,562	(2)	$	34.74	—
February 22 – March 28, 2015	3,573	(2)	$	35.52	—
(1) Shares available to be purchased under the Company’s 20 million share repurchase authorization until October 2015.  The extension of the authorization was announced on October 24, 2014.
(2) Shares tendered to the Company by holders of stock-based awards in payment of the purchase price and/or withholding taxes upon exercise and/or vesting.

26

Item 6.		Exhibits
	31.1		Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
	31.2		Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
	32.1		Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
	32.2		Certification of Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
	101.CAL		XBRL Taxonomy Extension Calculation Linkbase
	101.DEF		XBRL Taxonomy Extension Definition Linkbase
	101.INS		XBRL Instance Document
	101.LAB		XBRL Taxonomy Extension Label Linkbase
	101.PRE		XBRL Presentation Linkbase Document
	101.SCH		XBRL Taxonomy Extension Schema

Items 3, 4, and 5 are not applicable and have been omitted.

27

SIGNATURES

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.

	MUELLER INDUSTRIES, INC.
	/s/ Jeffrey A. Martin
	Jeffrey A. Martin
April 23, 2015	Chief Financial Officer and Treasurer
Date	(Principal Financial and Accounting Officer)
	/s/ Anthony J. Steinriede
April 23, 2015	Anthony J. Steinriede
Date	Vice President – Corporate Controller

28

EXHIBIT INDEX
Exhibits	Description
31.1	Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2	Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1	Certification of Chief Executive Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
32.2	Certification of Chief Financial Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101.CAL	XBRL Taxonomy Extension Calculation Linkbase
101.DEF	XBRL Taxonomy Extension Definition Linkbase
101.INS	XBRL Instance Document
101.LAB	XBRL Taxonomy Extension Label Linkbase
101.PRE	XBRL Presentation Linkbase Document
101.SCH	XBRL Taxonomy Extension Schema

EX-31.1

Exhibit 31.1

CERTIFICATION

I, Gregory L Christopher, certify that:

1.	I have reviewed this quarterly report on Form 10-Q of Mueller Industries, Inc.;
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: April 23, 2015
	/s/ Gregory L. Christopher
	Gregory L. Christopher
	Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION

I, Jeffrey A. Martin, certify that:

1.	I have reviewed this quarterly report on Form 10-Q of Mueller Industries, Inc.;
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: April 23, 2015
	/s/ Jeffrey A. Martin
	Jeffrey A. Martin
	Chief Financial Officer

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO SECTION 906

OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Mueller Industries, Inc. (the “Company”) on Form 10-Q for the period ending March 28, 2015 as filed with the Securities and Exchange Commission on the date hereof (the "Report"), I, Gregory L. Christopher, Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(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 financial condition and results of operations of the Company.
		/s/ Gregory L. Christopher
		Gregory L. Christopher
		Chief Executive Officer
		April 23, 2015

EX-32.2

Exhibit 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO SECTION 906

OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Mueller Industries, Inc. (the “Company”) on Form 10-Q for the period ending March 28, 2015 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Jeffrey A. Martin, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(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 financial condition and results of operations of the Company.
		/s/ Jeffrey A. Martin
		Jeffrey A. Martin
		Chief Financial Officer
		April 23, 2015

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Recently Issued Accounting Standards

3 Months Ended

Mar. 28, 2015

Recently Issued Accounting Standards [Abstract]

Recently Issued Accounting Standards

Note 10 – Recently Issued Accounting Standards

In May 2014, the Financial Accounting Standards Board issued Accounting Standards Update (ASU) No. 2014-09, Revenue from Contracts with Customers (Topic 606) (ASU 2014-09).  The ASU will supersede virtually all existing revenue recognition guidance under U.S. GAAP and will be effective for annual reporting periods beginning after December 15, 2016.  The fundamental principles of the new guidance are that companies should recognize revenue in a manner that reflects the timing of the transfer of services to customers and the amount of revenue recognized reflects the consideration that a company expects to receive for the goods and services provided.  The new guidance establishes a five-step approach for the recognition of revenue.  The Company is in the process of evaluating the impact of ASU 2014-09 on its Consolidated Financial Statements.

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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 28, 2015	Mar. 29, 2014
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) [Abstract]
Net change with respect to derivative instruments and hedging activities, tax	$ 274	$ 590
Net actuarial loss on pension and postretirement obligations, tax	$ (501)	$ 28

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Inventories

3 Months Ended

Mar. 28, 2015

Inventories [Abstract]

Inventories

Note 3 – Inventories

(In thousands)	March 28, 2015			December 27, 2014
Raw materials and supplies	$	53,327		$	53,586
Work-in-process		30,912			39,707
Finished goods		167,033			168,481
Valuation reserves		(4,877	)		(5,189	)
Inventories	$	246,395		$	256,585

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Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 28, 2015	Feb. 18, 2015	Jun. 21, 2011
Loss Contingencies [Line Items]
Term of guarantees	1 year
Payments required to be made under guarantees, maximum	$ 10.2
United States Department of Commerce Antidumping Review [Member]
Loss Contingencies [Line Items]
Assignment of antidumping duty rate on U.S. imports by Company subsidiaries (in hundredths)		13.70%	19.80%
Reserve for Antidumping Duties	$ 1.1

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Inventories (Tables)

3 Months Ended

Mar. 28, 2015

Inventories [Abstract]

Inventories

(In thousands)	March 28, 2015			December 27, 2014
Raw materials and supplies	$	53,327		$	53,586
Work-in-process		30,912			39,707
Finished goods		167,033			168,481
Valuation reserves		(4,877	)		(5,189	)
Inventories	$	246,395		$	256,585

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Benefits Plans (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 28, 2015	Mar. 29, 2014
Pension Benefits [Member]
Components of net periodic benefit cost [Abstract]
Service cost	$ 272	$ 222
Interest cost	2,054	2,068
Expected return on plan assets	(2,654)	(3,201)
Amortization of net loss (gain)	714	188
Net periodic benefit cost (income)	386	(723)
Other Benefits [Member]
Components of net periodic benefit cost [Abstract]
Service cost	96	89
Interest cost	196	177
Amortization of prior service cost	2	0
Amortization of net loss (gain)	3	(64)
Net periodic benefit cost (income)	$ 297	$ 202

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Industry Segments (Details) (USD $)	3 Months Ended
	Mar. 28, 2015	Mar. 29, 2014
Industry Segments [Abstract]
Decrease in accruals related to import duties included in cost of goods sold		$ 3,100,000
Summary of segment information [Abstract]
Net sales	537,242,000	574,374,000
Cost of goods sold	460,834,000	495,777,000
Depreciation and amortization	7,853,000	8,107,000
Selling, general, and administrative expense	32,831,000	32,183,000
Operating income	35,724,000	38,307,000
Interest expense	(2,076,000)	(1,026,000)
Other income, net	105,000	88,000
Income before income taxes	33,753,000	37,369,000
Corporate and Eliminations [Member]
Summary of segment information [Abstract]
Net sales	(3,092,000)	(3,683,000)
Cost of goods sold	(3,062,000)	(3,651,000)
Depreciation and amortization	475,000	604,000
Selling, general, and administrative expense	5,810,000	6,228,000
Operating income	(6,315,000)	(6,864,000)
Plumbing and Refrigeration Segment [Member] | Operating Segments [Member]
Summary of segment information [Abstract]
Net sales	305,017,000	338,027,000
Cost of goods sold	260,463,000	289,025,000
Depreciation and amortization	4,523,000	4,420,000
Selling, general, and administrative expense	20,540,000	20,697,000
Operating income	19,491,000	23,885,000
OEM Segment [Member] | Operating Segments [Member]
Summary of segment information [Abstract]
Net sales	235,317,000	240,030,000
Cost of goods sold	203,433,000	210,403,000
Depreciation and amortization	2,855,000	3,083,000
Selling, general, and administrative expense	6,481,000	5,258,000
Operating income	$ 22,548,000	$ 21,286,000

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Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 28, 2015	Mar. 29, 2014
Changes In Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	$ (42,923)	$ (10,819)
Other comprehensive income (loss) before reclassifications	(7,666)	(193)
Amounts reclassified from accumulated OCI	1,160	227
Net current-period other comprehensive income	(6,506)	34
Ending balance	(49,429)	(10,785)
Reclassification adjustments out of AOCI [Abstract]
Cost of goods sold	(460,834)	(495,777)
Depreciation expense	(8,015)	(8,165)
Interest expense	(2,076)	(1,026)
Net of tax and noncontrolling interest	(198)	(1,116)
Selling, general, and administrative expense	(32,831)	(32,183)
Cumulative Translation Adjustment [Member]
Changes In Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(7,076)	(462)
Other comprehensive income (loss) before reclassifications	(7,697)	1,162
Amounts reclassified from accumulated OCI	0	0
Net current-period other comprehensive income	(7,697)	1,162
Ending balance	(14,773)	700
Unrealized Losses/(Gains) on Derivatives [Member]
Changes In Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(953)	1,546
Other comprehensive income (loss) before reclassifications	(837)	(1,233)
Amounts reclassified from accumulated OCI	639	117
Net current-period other comprehensive income	(198)	(1,116)
Ending balance	(1,151)	430
Unrealized Losses/(Gains) on Derivatives [Member] | Amount Reclassified from AOCI [Member]
Reclassification adjustments out of AOCI [Abstract]
Cost of goods sold	762	357
Depreciation expense	0	(276)
Interest expense	106	0
Income tax (expense) benefit	(229)	36
Net of tax	639	117
Noncontrolling interest	0	0
Net of tax and noncontrolling interest	639	117
Minimum Pension/OPEB Liability Adjustment [Member]
Changes In Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(35,164)	(12,158)
Other comprehensive income (loss) before reclassifications	895	(107)
Amounts reclassified from accumulated OCI	521	110
Net current-period other comprehensive income	1,416	3
Ending balance	(33,748)	(12,155)
Minimum Pension/OPEB Liability Adjustment [Member] | Amount Reclassified from AOCI [Member]
Reclassification adjustments out of AOCI [Abstract]
Selling, general, and administrative expense	719	124
Income tax expense	(198)	(14)
Net of tax	521	110
Noncontrolling interest	0	0
Net of tax and noncontrolling interest	521	110
Unrealized Gains on Equity Investments [Member]
Changes In Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	270	255
Other comprehensive income (loss) before reclassifications	(27)	(15)
Amounts reclassified from accumulated OCI	0	0
Net current-period other comprehensive income	(27)	(15)
Ending balance	$ 243	$ 240

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Inventories (Details) (USD $) In Thousands, unless otherwise specified	Mar. 28, 2015	Dec. 27, 2014
Inventories [Abstract]
Raw materials and supplies	$ 53,327	$ 53,586
Work-in-process	30,912	39,707
Finished goods	167,033	168,481
Valuation reserves	(4,877)	(5,189)
Inventories	$ 246,395	$ 256,585

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CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 28, 2015	Dec. 27, 2014
Current assets:
Allowance for doubtful accounts	$ 565	$ 666
Mueller Industries, Inc. stockholders' equity:
Preferred stock, par value (in dollars per share)	$ 1.00	$ 1.00
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	80,183,004	80,183,004
Common stock, shares outstanding (in shares)	56,943,098	56,901,445

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Earnings per Common Share

3 Months Ended

Mar. 28, 2015

Earnings per Common Share [Abstract]

Earnings per Common Share

Note 1 – Earnings per Common Share

Basic per share amounts have been computed based on the average number of common shares outstanding.  Diluted per share amounts reflect the increase in average common shares outstanding that would result from the assumed exercise of outstanding stock options and vesting of restricted stock awards, computed using the treasury stock method.  Approximately 180 thousand stock-based awards were excluded from the computation of diluted earnings per share for the quarter ended March 28, 2015 because they were antidilutive.

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Industry Segments

3 Months Ended

Mar. 28, 2015

Industry Segments [Abstract]

Industry Segments

Note 4 – Industry Segments

The Company’s reportable segments are Plumbing & Refrigeration and Original Equipment Manufacturers (OEM).  For disclosure purposes, as permitted under Accounting Standards Codification (ASC) 280, Segment Reporting, certain operating segments are aggregated into reportable segments.  The Plumbing & Refrigeration segment is composed of Standard Products (SPD), European Operations, and Mexican Operations.  The OEM segment is composed of Industrial Products (IPD), Engineered Products (EPD), and Jiangsu Mueller–Xingrong Copper Industries Limited (Mueller-Xingrong).  These segments are classified primarily by the markets for their products.  Performance of segments is generally evaluated by their operating income.  

SPD manufactures copper tube and fittings, plastic fittings, and line sets.  These products are manufactured in the U.S.  SPD also imports and resells brass and plastic plumbing valves, malleable iron fittings, faucets, and plumbing specialty products.  Outside the U.S., the Company’s European Operations manufacture copper tube, which is sold primarily in Europe.  Mexican Operations consist of pipe nipple manufacturing and import distribution businesses including product lines of malleable iron fittings and other plumbing specialties.  The Plumbing & Refrigeration segment’s products are sold primarily to plumbing, refrigeration, and air-conditioning wholesalers, hardware wholesalers and co-ops, and building product retailers. For the quarter ended March 29, 2014, cost of goods sold included a decrease in accruals related to import duties of $3.1 million.

IPD manufactures brass rod, impact extrusions, and forgings, as well as a wide variety of end products including plumbing brass, automotive components, valves, and fittings.  EPD manufactures and fabricates valves and assemblies primarily for the refrigeration, air-conditioning, gas appliance, and barbecue grill markets and specialty copper, copper-alloy, and aluminum tube.  Mueller-Xingrong manufactures engineered copper tube primarily for air-conditioning applications.  These products are sold primarily to OEM customers.

Summarized segment information is as follows:

	For the Quarter Ended March 28, 2015
(In thousands)	Plumbing & Refrigeration Segment		OEM Segment		Corporate and Eliminations			Total
Net sales	$	305,017	$	235,317	$	(3,092	)	$	537,242
Cost of goods sold		260,463		203,433		(3,062	)		460,834
Depreciation and amortization		4,523		2,855		475			7,853
Selling, general, and administrative expense		20,540		6,481		5,810			32,831
Operating income		19,491		22,548		(6,315	)		35,724
Interest expense									(2,076	)
Other income, net									105
Income before income taxes								$	33,753

	For the Quarter Ended March 29, 2014
(In thousands)	Plumbing & Refrigeration Segment		OEM Segment		Corporate and Eliminations			Total
Net sales	$	338,027	$	240,030	$	(3,683	)	$	574,374
Cost of goods sold		289,025		210,403		(3,651	)		495,777
Depreciation and amortization		4,420		3,083		604			8,107
Selling, general, and administrative expense		20,697		5,258		6,228			32,183
Operating income		23,885		21,286		(6,864	)		38,307
Interest expense									(1,026	)
Other income, net									88
Income before income taxes								$	37,369

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Commitments and Contingencies

3 Months Ended

Mar. 28, 2015

Commitments and Contingencies [Abstract]

Commitments and Contingencies

Note 2 – Commitments and Contingencies

The Company is involved in certain litigation as a result of claims that arose in the ordinary course of business, which management believes will not have a material adverse effect on the Company’s financial position, results of operations, or cash flows.  The Company may also realize the benefit of certain legal claims and litigation in the future; these gain contingencies are not recognized in the Condensed Consolidated Financial Statements.

United States Department of Commerce Antidumping Review

On December 23, 2009, the Department of Commerce (DOC) initiated an antidumping administrative review of the antidumping duty order covering circular welded non-alloy steel pipe and tube from Mexico for the November 1, 2008  through October 31, 2009 period of review.  The DOC selected Mueller Comercial de Mexico, S. de R.L. de C.V. (Mueller Comercial) as a respondent in the review.  On June 21, 2011, the DOC published the final results of the review and assigned Mueller Comercial an antidumping duty rate of 19.8 percent.  On August 22, 2011, the Company appealed the final results to the U.S. Court of International Trade (CIT).  On December 21, 2012, the CIT issued a decision upholding the DOC’s final results in part.  The CIT issued its final judgment on May 2, 2013. On May 6, 2013, the Company appealed the CIT decision to the U.S. Court of Appeals for the Federal Circuit (Federal Circuit).  On May 29, 2014, the Federal Circuit issued its decision vacating the CIT’s decision and remanding the case back to the DOC to reconsider the Company’s rate.  The Company and the United States have reached an agreement to settle the appeal.  In accordance with that agreement, on February 18, 2015, the DOC published the amended final results of the review and assigned Mueller Comercial an amended antidumping rate of 13.70 percent.  The Company anticipates that certain of its subsidiaries will incur antidumping duties on subject imports made during the period of review and, as such, has previously established a reserve of approximately $1.1 million for this matter.

Subsequent to October 31, 2009, Mueller Comercial did not ship subject merchandise to the United States.  Therefore, there is zero antidumping duty liability for periods of review after October 31, 2009.

Guarantees

Guarantees, in the form of letters of credit, are issued by the Company generally to assure the payment of insurance deductibles and certain retiree health benefits.  The terms of the Company’s guarantees are generally one year but are renewable annually as required.  These letters are primarily backed by the Company’s revolving credit facility.  The maximum payments that the Company could be required to make under its guarantees at March 28, 2015 were $10.2 million.

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Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 28, 2015	Mar. 29, 2014
Income Taxes [Abstract]
Effective tax rate (in hundredths)	34.00%	33.00%
Reduction for U.S. production activities	$ 1.0	$ 1.2
Increase (decrease) in valuation allowances		(0.9)
Provision for state income taxes, net of federal benefit	0.8	1.3
Effect of foreign adjustments	$ 0.5

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Acquisitions (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended	12 Months Ended	0 Months Ended	12 Months Ended
	Feb. 28, 2014	Dec. 29, 2012	Mar. 30, 2015	Mar. 31, 2015	Mar. 28, 2015
KME Yorkshire Limited [Member]
Business Acquisition [Line Items]
Cost of acquisition	$ 30.1
Pro forma net sales		196.1
Fair value of assets acquired	20.7
Fair value of assets acquired - inventories	17.6
Fair value of assets acquired - property, plant and equipment	2.1
Fair value of assets acquired - other current assets	1.0
Fair value of liabilities assumed	15.6
Fair value of liabilities assumed - accounts payable and accrued expenses	15.2
Fair value of liabilities assumed - other current liabilities	0.4
Remaining purchase price allocated to goodwill	8.1
Remaining purchase price allocated to other intangible assets	16.9
Expected additional expenses to be incurred					2.7
Turbotec Products, Inc. [Member] | Subsequent Event [Member]
Business Acquisition [Line Items]
Cost of acquisition			14.2
Pro forma net sales				$ 21.8

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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 28, 2015	Mar. 29, 2014
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) [Abstract]
Consolidated net income	$ 22,340	$ 24,954
Other comprehensive (loss) income, net of tax:
Foreign currency translation	(8,404)	1,167
Net change with respect to derivative instruments and hedging activities, net of tax of $274 in 2015 and $590 in 2014	(198)	(1,116)
Net actuarial loss on pension and postretirement obligations, net of tax of $(501) in 2015 and $28 in 2014	1,416	3
Other, net	(27)	(15)
Total other comprehensive (loss) income	(7,213)	39
Comprehensive income	15,127	24,993
Comprehensive loss (income) attributable to noncontrolling interest	345	(253)
Comprehensive income attributable to Mueller Industries, Inc.	$ 15,472	$ 24,740

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Derivative Instruments and Hedging Activities

3 Months Ended

Mar. 28, 2015

Derivative Instruments and Hedging Activities [Abstract]

Derivative Instruments and Hedging Activities

Note 7 – Derivative Instruments and Hedging Activities

The Company’s earnings and cash flows are subject to fluctuations due to changes in commodity prices, foreign currency exchange rates, and interest rates. The Company uses derivative instruments such as commodity futures contracts, foreign currency forward contracts, and interest rate swaps to manage these exposures.

All derivatives are recognized in the Condensed Consolidated Balance Sheets at their fair value. On the date the derivative contract is entered into, it is designated as (i) a hedge of a forecasted transaction or the variability of cash flow to be paid (cash flow hedge), or (ii) a hedge of the fair value of a recognized asset or liability (fair value hedge). Changes in the fair value of a derivative that is qualified, designated and highly effective as a cash flow hedge are recorded in accumulated other comprehensive income (AOCI), to the extent effective, until they are reclassified to earnings in the same period or periods during which the hedged transaction affects earnings. Changes in the fair value of a derivative that is qualified, designated and highly effective as a fair value hedge, along with the gain or loss on the hedged recognized asset or liability that is attributable to the hedged risk, are recorded in current earnings.  Changes in the fair value of undesignated derivative instruments and the ineffective portion of designated derivative instruments are reported in current earnings.

The Company documents all relationships between hedging instruments and hedged items, as well as the risk-management objective and strategy for undertaking various hedge transactions. This process includes linking all derivatives that are designated as fair value hedges to specific assets and liabilities in the Condensed Consolidated Balance Sheets and linking cash flow hedges to specific forecasted transactions or variability of cash flow.

The Company also assesses, both at the hedge’s inception and on an ongoing basis, whether the designated derivatives that are used in hedging transactions are highly effective in offsetting changes in cash flow or fair values of hedged items.  When a derivative is determined not to be highly effective as a hedge or the underlying hedged transaction is no longer probable of occurring, hedge accounting is discontinued prospectively, in accordance with the derecognition criteria for hedge accounting.

Commodity Futures Contracts

Copper and brass represent the largest component of the Company’s variable costs of production.  The cost of these materials is subject to global market fluctuations caused by factors beyond the Company’s control.  The Company occasionally enters into forward fixed-price arrangements with certain customers; the risk of these arrangements is generally managed with commodity futures contracts.   These futures contracts have been designated as cash flow hedges.  

At March 28, 2015, the Company held open futures contracts to purchase approximately $32.4 million of copper over the next nine months related to fixed price sales orders.  The fair value of those futures contracts was a $354 thousand net gain position, which was determined by obtaining quoted market prices (Level 1 hierarchy as defined by ASC 820, Fair Value Measurements and Disclosures (ASC 820)). In the next twelve months, the Company will reclassify into earnings realized gains or losses relating to cash flow hedges. At March 28, 2015, this amount was approximately $317 thousand of deferred net gains, net of tax.

The Company may also enter into futures contracts to protect the value of inventory against market fluctuations.   These futures contracts have been designated as fair value hedges.  

At March 28, 2015, the Company held open futures contracts to sell approximately $20.1 million of copper over the next four months related to copper inventory. The fair value of those futures contracts was a $181 thousand gain position, which was determined by obtaining quoted market prices (Level 1 hierarchy as defined by ASC 820).  

Foreign Currency Forward Contracts

The Company has entered into certain contracts to purchase heavy machinery and equipment denominated in euros. In anticipation of entering into these contracts, the Company entered into forward contracts to purchase euros to protect itself against adverse foreign exchange rate fluctuations.  

At March 28, 2015, the Company held open forward contracts to purchase approximately 326 thousand euros over the next four months.  The fair value of these contracts, which was determined by obtaining quoted market prices (Level 1 hierarchy as defined by ASC 820), was a $9 thousand loss position. At March 28, 2015, there was $101 thousand of deferred gains, net of tax, included in AOCI that are expected to be reclassified into depreciation expense over the useful life of the heavy machinery and equipment.

Interest Rate Swap

On February 20, 2013, the Company entered into a two-year forward-starting interest rate swap agreement with an effective date of January 12, 2015, and an underlying notional amount of $200.0 million, pursuant to which the Company receives variable interest payments based on one-month LIBOR and pays fixed interest at a rate of 1.4 percent.  Based on the Company’s current variable premium pricing on its Term Loan Facility, the all-in fixed rate on the effective date was 2.7 percent.  The interest rate swap will mature on December 11, 2017, and is structured to offset the interest rate risk associated with the Company’s floating-rate, LIBOR-based Term Loan Facility Agreement.  The swap was designated and accounted for as a cash flow hedge from inception.

The fair value of the interest rate swap is estimated based on the present value of the difference between expected cash flows calculated at the contracted interest rate and the expected cash flows at the current market interest rate using observable benchmarks for LIBOR forward rates at the end of the period (Level 2 hierarchy as defined by ASC 820).  Interest payable and receivable under the swap agreement is accrued and recorded as an adjustment to interest expense.  The fair value of the interest rate swap was a $2.4 million loss position at March 28, 2015, and there was $1.6 million of deferred net losses, net of tax, included in AOCI that are expected to be reclassified into interest expense over the term of the hedged item.

We present our derivative assets and liabilities in our Condensed Consolidated Balance Sheets on a net basis by counterparty. The following table summarizes the location and fair value of the derivative instruments and disaggregates our net derivative assets and liabilities into gross components on a contract-by-contract basis:

	Asset Derivatives							Liability Derivatives
		Fair Value							Fair Value
(In thousands)	Balance Sheet Location	March 28, 2015			December 27, 2014			Balance Sheet Location	March 28, 2015			December 27, 2014
Hedging instrument:
Commodity contracts - gains	Other current assets	$	941		$	99		Other current liabilities	$	310		$	15
Commodity contracts - losses	Other current assets		(102	)		(4	)	Other current liabilities		(614	)		(832	)
Foreign currency contracts	Other current assets		—			—		Other current liabilities		(9	)		(81	)
Interest rate swap	Other assets		—			—		Other liabilities		(2,436	)		(927	)
Total derivatives (1)		$	839		$	95			$	(2,749	)	$	(1,825	)
(1) Does not include the impact of cash collateral provided to counterparties.

The following tables summarize the effects of derivative instruments in our Condensed Consolidated Statements of Income:

		Three Months Ended
(In thousands)	Location	March 28, 2015			March 29, 2014
Fair value hedges:
Gain on commodity contracts (qualifying)	Cost of goods sold	$	213		$	6,291
Loss on hedged item - Inventory	Cost of goods sold		(247	)		(5,800	)
Undesignated derivatives:
Gain on commodity contracts (nonqualifying)	Cost of goods sold	$	234		$	1,538

The following tables summarize amounts recognized in and reclassified from AOCI during the period:

	Three Months Ended March 28, 2015
(In thousands)	Gain (Loss) Recognized in AOCI (Effective Portion), Net of Tax			Classification Gains (Losses)		Loss (Gain) Reclassified from AOCI (Effective Portion), Net of Tax
Cash flow hedges:
Commodity contracts	$	274		Cost of goods sold	$	571
Foreign currency contracts		(55	)	Depreciation expense		—
Interest rate swap		(1,032	)	Interest expense		68

	Three Months Ended March 29, 2014
(In thousands)	(Loss) Gain Recognized in AOCI (Effective Portion), Net of Tax			Classification Gains (Losses)		Loss (Gain) Reclassified from AOCI (Effective Portion), Net of Tax
Cash flow hedges:
Commodity contracts	$	(1,010	)	Cost of goods sold	$	291
Foreign currency contracts		22		Depreciation expense		(174	)
Interest rate swap		(245	)	Interest expense		—

The Company enters into futures and forward contracts that closely match the terms of the underlying transactions.  As a result, the ineffective portion of the open hedge contracts through March 28, 2015 was not material to the Condensed Consolidated Statements of Income.

The Company primarily enters into International Swaps and Derivatives Association (ISDA) master netting agreements with major financial institutions that permit the net settlement of amounts owed under their respective derivative contracts. Under these master netting agreements, net settlement generally permits the Company or the counterparty to determine the net amount payable for contracts due on the same date and in the same currency for similar types of derivative transactions. The master netting agreements generally also provide for net settlement of all outstanding contracts with a counterparty in the case of an event of default or a termination event.  The Company does not offset fair value amounts for derivative instruments and fair value amounts recognized for the right to reclaim cash collateral.  At March 28, 2015 and December 27, 2014, the Company had recorded restricted cash in other current assets of $1.7 million and $0.5 million, respectively, as collateral related to open derivative contracts under the master netting arrangements.

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CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 28, 2015	Dec. 27, 2014
Current assets:
Cash and cash equivalents	$ 326,894	$ 352,134
Accounts receivable, less allowance for doubtful accounts of $565 in 2015 and $666 in 2014	307,984	275,065
Inventories	246,395	256,585
Other current assets	59,858	57,429
Total current assets	941,131	941,213
Property, plant, and equipment, net	244,909	245,910
Goodwill	102,582	102,909
Other assets	36,208	38,064
Total assets	1,324,830	1,328,096
Current liabilities:
Current portion of debt	31,676	36,194
Accounts payable	100,813	100,735
Accrued wages and other employee costs	30,070	41,595
Other current liabilities	61,601	59,545
Total current liabilities	224,160	238,069
Long-term debt, less current portion	205,000	205,250
Pension liabilities	18,461	20,070
Postretirement benefits other than pensions	21,368	21,486
Environmental reserves	21,832	21,842
Deferred income taxes	23,100	24,556
Other noncurrent liabilities	3,107	1,389
Total liabilities	517,028	532,662
Mueller Industries, Inc. stockholders' equity:
Preferred stock - $1.00 par value; shares authorized 5,000,000; none outstanding	0	0
Common stock - $.01 par value; shares authorized 100,000,000; issued 80,183,004; outstanding 56,943,098 in 2015 and 56,901,445 in 2014	802	802
Additional paid-in capital	269,636	268,575
Retained earnings	1,010,505	992,798
Accumulated other comprehensive loss	(49,429)	(42,923)
Treasury common stock, at cost	(456,651)	(457,102)
Total Mueller Industries, Inc. stockholders' equity	774,863	762,150
Noncontrolling interest	32,939	33,284
Total equity	807,802	795,434
Commitments and contingencies
Total liabilities and equity	$ 1,324,830	$ 1,328,096

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CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 28, 2015	Mar. 29, 2014
CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) [Abstract]
Net sales	$ 537,242	$ 574,374
Cost of goods sold	460,834	495,777
Depreciation and amortization	7,853	8,107
Selling, general, and administrative expense	32,831	32,183
Operating income	35,724	38,307
Interest expense	(2,076)	(1,026)
Other income, net	105	88
Income before income taxes	33,753	37,369
Income tax expense	(11,413)	(12,415)
Consolidated net income	22,340	24,954
Net income attributable to noncontrolling interest	(362)	(248)
Net income attributable to Mueller Industries, Inc.	$ 21,978	$ 24,706
Weighted average shares for basic earnings per share (in shares)	56,193	55,918
Effect of dilutive stock-based awards (in shares)	731	853
Adjusted weighted average shares for diluted earnings per share (in shares)	56,924	56,771
Basic earnings per share (in dollars per share)	$ 0.39	$ 0.44
Diluted earnings per share (in dollars per share)	$ 0.39	$ 0.44
Dividends per share (in dollars per share)	$ 0.075	$ 0.075

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Derivative Instruments and Hedging Activities (Details) (USD $)	3 Months Ended
	Mar. 28, 2015		Dec. 27, 2014
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Assets fair value	$ 839,000	[1]	$ 95,000	[1]
Liabilities fair value	(2,749,000)	[1]	(1,825,000)	[1]
Commodity Contracts [Member] | Cash Flow Hedging [Member] | Long [Member]
Derivatives, Fair Value [Line Items]
Open future contracts to purchase copper	32,400,000
Time period for open copper future contract purchases	9 months
Fair value of future contracts with gain (loss) position	354,000
Commodity Contracts [Member] | Fair Value Hedging [Member] | Short [Member]
Derivatives, Fair Value [Line Items]
Open future contracts to sell copper	20,100,000
Time period for open copper future contract sales	4 months
Fair value of future contracts with gain (loss) position	181,000
Other Current Asset [Member] | Commodity Contracts [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Other current assets: Gain positions	941,000		99,000
Other current assets: Loss positions	(102,000)		(4,000)
Other Current Asset [Member] | Foreign Currency Contracts [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Other current assets: Gain positions	0		0
Other Assets [Member] | Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Other assets: Gain positions	0		0
Other Current Liabilities [Member] | Commodity Contracts [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Other current liability: Gain positions	310,000		15,000
Other current liability: Loss positions	(614,000)		(832,000)
Other Current Liabilities [Member] | Foreign Currency Contracts [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Other current liability: Loss positions	(9,000)		(81,000)
Other Liabilities [Member] | Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Other liabilities: Loss positions	$ (2,436,000)		$ (927,000)

[1] Does not include the impact of cash collateral received from or provided to counterparties.

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Earnings per Common Share (Details) (Stock Option [Member]) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 28, 2015
Stock Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	180

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Income Taxes

3 Months Ended

Mar. 28, 2015

Income Taxes [Abstract]

Income Taxes

Note 6 – Income Taxes

The Company’s effective tax rate for the first quarter of 2015 was 34 percent compared with 33 percent for the same period last year.  The difference between the effective tax rate and the amount computed using the U.S. federal statutory tax rate for the first quarter of 2015 was primarily attributable to reductions for the U.S. production activities deduction of $1.0 million and the effect of foreign tax rates lower than statutory tax rates of $0.5 million.  These items were partially offset by the provision for state income taxes, net of the federal benefit, of $0.8 million.

For the first quarter of 2014, the difference between the effective tax rate and what would be computed using the U.S. federal statutory tax rate was attributable to reductions related to the U.S. production activities deduction of $1.2 million and decreases in valuation allowances of $0.9 million. These items were partially offset by the provision for state income taxes, net of the federal benefit, of $1.3 million.

The Company files a consolidated U.S. federal income tax return and numerous consolidated and separate-company income tax returns in many state, local, and foreign jurisdictions.  The statute of limitations is open for the Company’s federal tax return and most state income tax returns for 2011 and all subsequent years and is open for certain state and foreign returns for earlier tax years due to ongoing audits and differing statute periods.  The Internal Revenue Service has audited the 2012 federal income tax return, the results of which were immaterial to the Company’s financial position, results of operations, and cash flows.  While the Company believes that it is adequately reserved for possible future audit adjustments, the final resolution of these examinations cannot be determined with certainty and could result in final settlements that differ from current estimates.

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Derivative Instruments and Hedging Activities Part 2 (Details)				3 Months Ended																0 Months Ended	3 Months Ended
	Mar. 28, 2015 USD ($)	Dec. 27, 2014 USD ($)	Mar. 28, 2015 Commodity Contracts [Member] USD ($)	Mar. 28, 2015 Commodity Contracts [Member] Not Designated as Hedging Instrument [Member] Cost of Goods Sold [Member] USD ($)	Mar. 29, 2014 Commodity Contracts [Member] Not Designated as Hedging Instrument [Member] Cost of Goods Sold [Member] USD ($)	Mar. 28, 2015 Commodity Contracts [Member] Cash Flow Hedging [Member] USD ($)	Mar. 29, 2014 Commodity Contracts [Member] Cash Flow Hedging [Member] USD ($)	Mar. 28, 2015 Commodity Contracts [Member] Cash Flow Hedging [Member] Cost of Goods Sold [Member] USD ($)	Mar. 29, 2014 Commodity Contracts [Member] Cash Flow Hedging [Member] Cost of Goods Sold [Member] USD ($)	Mar. 28, 2015 Commodity Contracts [Member] Fair Value Hedging [Member] Cost of Goods Sold [Member] USD ($)	Mar. 29, 2014 Commodity Contracts [Member] Fair Value Hedging [Member] Cost of Goods Sold [Member] USD ($)	Mar. 28, 2015 Foreign Currency Contracts [Member] USD ($)	Mar. 28, 2015 Foreign Currency Contracts [Member] EUR (€)	Mar. 28, 2015 Foreign Currency Contracts [Member] Cash Flow Hedging [Member] USD ($)	Mar. 29, 2014 Foreign Currency Contracts [Member] Cash Flow Hedging [Member] USD ($)	Mar. 28, 2015 Foreign Currency Contracts [Member] Cash Flow Hedging [Member] Depreciation Expense [Member] USD ($)	Mar. 29, 2014 Foreign Currency Contracts [Member] Cash Flow Hedging [Member] Depreciation Expense [Member] USD ($)	Mar. 28, 2015 Inventory [Member] Fair Value Hedging [Member] Cost of Goods Sold [Member] USD ($)	Mar. 29, 2014 Inventory [Member] Fair Value Hedging [Member] Cost of Goods Sold [Member] USD ($)	Feb. 20, 2013 Interest Rate Swap [Member] USD ($)	Mar. 28, 2015 Interest Rate Swap [Member] USD ($)	Mar. 28, 2015 Interest Rate Swap [Member] Cash Flow Hedging [Member] USD ($)	Mar. 29, 2014 Interest Rate Swap [Member] Cash Flow Hedging [Member] USD ($)	Mar. 28, 2015 Interest Rate Swap [Member] Cash Flow Hedging [Member] Interest Expense [Member] USD ($)	Mar. 29, 2014 Interest Rate Swap [Member] Cash Flow Hedging [Member] Interest Expense [Member] USD ($)
Derivative Instruments, Gain (Loss) [Line Items]
(Loss) Gain Recognized in AOCI (Effective Portion), Net of Tax						$ 274,000	$ (1,010,000)							$ (55,000)	$ 22,000							$ (1,032,000)	$ (245,000)
(Gain) Loss Reclassified from AOCI (Effective Portion), Net of Tax								571,000	291,000							0	(174,000)							68,000	0
Gain (loss) on the derivatives in designated and qualifying fair value hedges										213,000	6,291,000							(247,000)	(5,800,000)
Gain (loss) on undesignated derivatives				234,000	1,538,000
Notional amount													326,000							200,000,000
Time period for open forward contracts to purchase												4 months	4 months
Period of interest rate swap																				2 years
Interest rate swap, fixed interest rate (in hundredths)																				1.40%
Term loan facility, all-in fixed interest rate (in hundredths)																				2.70%
Interest rate swap maturity date																					Dec. 11, 2017
Deferred net gains (losses), net of tax, included in AOCI			317,000									101,000									(1,600,000)
Restricted cash in other current assets as collateral related to open derivative contracts	$ 1,700,000	$ 500,000

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Acquisitions

3 Months Ended

Mar. 28, 2015

Acquisitions [Abstract]

Acquisitions

Note 9 – Acquisitions

On October 18, 2013, the Company entered into a definitive agreement with KME Yorkshire Limited to acquire certain assets and assume certain liabilities of its copper tube business.  Yorkshire Copper Tube (Yorkshire) produces European standard copper distribution tubes.  This transaction received regulatory approval in the United Kingdom on February 11, 2014 and closed on February 28, 2014.  The purchase price was approximately $30.1 million, paid in cash.  The acquisition of Yorkshire complements the Company’s existing copper tube businesses in the Plumbing & Refrigeration segment.  In 2012, Yorkshire had annual revenue of approximately $196.1 million.  During the third quarter of 2014, the purchase price allocation, including all fair value measurements, was finalized.  The fair value of the assets acquired totaled $20.7 million, consisting primarily of inventories of $17.6 million, property, plant, and equipment of $2.1 million, and other current assets of $1.0 million.  The fair value of the liabilities assumed totaled $15.6 million, consisting primarily of accounts payable and accrued expenses of $15.2 million and other current liabilities of $0.4 million.  Of the remaining purchase price, $8.1 million was allocated to tax-deductible goodwill and $16.9 million was allocated to other intangible assets.

The Company expects to recognize approximately $2.7 million of severance costs related to the reorganization of Yorkshire during the remainder of 2015.

On March 30, 2015, subsequent to the end of the first quarter, the Company entered into a Stock Purchase Agreement with Turbotec Products, Inc. (Turbotec) providing for the purchase of all of the outstanding capital stock of Turbotec for approximately $14.2 million in cash, net of working capital adjustments. Turbotec manufactures coaxial heat exchangers and twisted tubes for the HVAC, geothermal, refrigeration, swimming pool heat pump, marine, ice machine, commercial boiler, and heat reclamation markets.  The acquisition of Turbotec complements the Company’s existing refrigeration business, a component of the OEM segment.  For the twelve months ended March 31, 2015, Turbotec’s net sales were approximately $21.8 million.

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Benefits Plans

3 Months Ended

Mar. 28, 2015

Benefits Plans [Abstract]

Benefits Plans

Note 5 –Benefits Plans

The Company sponsors several qualified and nonqualified pension plans and other postretirement benefit plans for certain of its employees.  The components of net periodic benefit cost (income) are as follows:

	For the Quarter Ended
(In thousands)	March 28, 2015			March 29, 2014
Pension benefits:
Service cost	$	272		$	222
Interest cost		2,054			2,068
Expected return on plan assets		(2,654	)		(3,201	)
Amortization of net loss		714			188
Net periodic benefit cost (income)	$	386		$	(723	)
Other benefits:
Service cost	$	96		$	89
Interest cost		196			177
Amortization of prior service cost		2			—
Amortization of net loss (gain)		3			(64	)
Net periodic benefit cost	$	297		$	202

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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 28, 2015	Mar. 29, 2014
Cash flows from operating activities
Consolidated net income	$ 22,340	$ 24,954
Reconciliation of consolidated net income to net cash provided by (used in) operating activities:
Depreciation and amortization	8,015	8,165
Stock-based compensation expense	1,349	1,194
Loss (gain) on disposal of properties	1	(1,413)
Deferred income taxes	(570)	(1,484)
Income tax benefit from exercise of stock options	(69)	(156)
Changes in assets and liabilities, net of business acquired:
Receivables	(36,692)	(49,482)
Inventories	7,534	(10,055)
Other assets	9,257	(14,467)
Current liabilities	(7,389)	(1,337)
Other liabilities	(131)	(989)
Other, net	245	398
Net cash provided by (used in) operating activities	3,890	(44,672)
Cash flows from investing activities
Acquisition of business	0	(30,137)
Capital expenditures	(7,392)	(9,199)
Net (deposits into) withdrawals from restricted cash	(12,593)	1,771
Proceeds from the sales of assets	492	4,833
Net cash used in investing activities	(19,493)	(32,732)
Cash flows from financing activities
Repayments of long-term debt	(250)	(250)
Dividends paid to stockholders of Mueller Industries, Inc.	(4,216)	(4,196)
Repayment of debt by joint venture, net	(3,817)	(1,407)
Issuance of debt	0	4,373
Net cash used to settle stock-based awards	93	224
Income tax benefit from exercise of stock options	69	156
Net cash used in financing activities	(8,121)	(1,100)
Effect of exchange rate changes on cash	(1,516)	179
Decrease in cash and cash equivalents	(25,240)	(78,325)
Cash and cash equivalents at the beginning of the period	352,134	311,800
Cash and cash equivalents at the end of the period	$ 326,894	$ 233,475

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Industry Segments (Tables)

3 Months Ended

Mar. 28, 2015

Industry Segments [Abstract]

Summary of segment information

Summarized segment information is as follows:

	For the Quarter Ended March 28, 2015
(In thousands)	Plumbing & Refrigeration Segment		OEM Segment		Corporate and Eliminations			Total
Net sales	$	305,017	$	235,317	$	(3,092	)	$	537,242
Cost of goods sold		260,463		203,433		(3,062	)		460,834
Depreciation and amortization		4,523		2,855		475			7,853
Selling, general, and administrative expense		20,540		6,481		5,810			32,831
Operating income		19,491		22,548		(6,315	)		35,724
Interest expense									(2,076	)
Other income, net									105
Income before income taxes								$	33,753

	For the Quarter Ended March 29, 2014
(In thousands)	Plumbing & Refrigeration Segment		OEM Segment		Corporate and Eliminations			Total
Net sales	$	338,027	$	240,030	$	(3,683	)	$	574,374
Cost of goods sold		289,025		210,403		(3,651	)		495,777
Depreciation and amortization		4,420		3,083		604			8,107
Selling, general, and administrative expense		20,697		5,258		6,228			32,183
Operating income		23,885		21,286		(6,864	)		38,307
Interest expense									(1,026	)
Other income, net									88
Income before income taxes								$	37,369

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Accumulated Other Comprehensive Income

3 Months Ended

Mar. 28, 2015

Accumulated Other Comprehensive Income [Abstract]

Accumulated Other Comprehensive Income

Note 8 – Accumulated Other Comprehensive Income

AOCI includes certain foreign currency translation adjustments from those subsidiaries not using the U.S. dollar as their functional currency, net deferred gains and losses on certain derivative instruments accounted for as cash flow hedges, adjustments to pension and OPEB liabilities, and unrealized gains and losses on marketable securities classified as available-for-sale.

The following table provides changes in AOCI by component, net of taxes and noncontrolling interest (amounts in parentheses indicate debits to AOCI):

	For the Quarter Ended March 28, 2015
(In thousands)	Cumulative Translation Adjustment			Unrealized (Losses)/Gains on Derivatives			Minimum Pension/OPEB Liability Adjustment			Unrealized Gains on Equity Investments			Total
Balance at December 27, 2014	$	(7,076	)	$	(953	)	$	(35,164	)	$	270		$	(42,923	)
Other comprehensive income (loss) before reclassifications		(7,697	)		(837	)		895			(27	)		(7,666	)
Amounts reclassified from accumulated OCI		—			639			521			—			1,160
Net current-period other comprehensive income		(7,697	)		(198	)		1,416			(27	)		(6,506	)
Balance at March 28, 2015	$	(14,773	)	$	(1,151	)	$	(33,748	)	$	243		$	(49,429	)

	For the Quarter Ended March 29, 2014
(In thousands)	Cumulative Translation Adjustment			Unrealized (Losses)/Gains on Derivatives			Minimum Pension/OPEB Liability Adjustment			Unrealized Gains on Equity Investments			Total
Balance at December 28, 2013	$	(462	)	$	1,546		$	(12,158	)	$	255		$	(10,819	)
Other comprehensive income (loss) before reclassifications		1,162			(1,233	)		(107	)		(15	)		(193	)
Amounts reclassified from accumulated OCI		—			117			110			—			227
Net current-period other comprehensive income		1,162			(1,116	)		3			(15	)		34
Balance at March 29, 2014	$	700		$	430		$	(12,155	)	$	240		$	(10,785	)

Reclassification adjustments out of accumulated OCI were as follows:

	Amount reclassified from AOCI
	For the Quarter Ended
(In thousands)	March 28, 2015			March 29, 2014			Affected line item
Unrealized losses/(gains) on derivatives:
Commodity contracts	$	762		$	357		Cost of goods sold
Foreign currency contracts		—			(276	)	Depreciation Expense
Interest rate swap		106			—		Interest expense
		(229	)		36		Income tax (expense) benefit
		639			117		Net of tax
		—			—		Noncontrolling interest
	$	639		$	117		Net of tax and noncontrolling   interest
Amortization of net loss and prior service cost on employee benefit plans	$	719		$	124		Selling, general, and administrative   expense
		(198	)		(14	)	Income tax expense
		521			110		Net of tax
		—			—		Noncontrolling interest
	$	521		$	110		Net of tax and noncontrolling   interest

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Accumulated Other Comprehensive Income (Tables)

3 Months Ended

Mar. 28, 2015

Accumulated Other Comprehensive Income [Abstract]

Changes in accumulated OCI by component, net of taxes and noncontrolling interest

The following table provides changes in AOCI by component, net of taxes and noncontrolling interest (amounts in parentheses indicate debits to AOCI):

	For the Quarter Ended March 28, 2015
(In thousands)	Cumulative Translation Adjustment			Unrealized (Losses)/Gains on Derivatives			Minimum Pension/OPEB Liability Adjustment			Unrealized Gains on Equity Investments			Total
Balance at December 27, 2014	$	(7,076	)	$	(953	)	$	(35,164	)	$	270		$	(42,923	)
Other comprehensive income (loss) before reclassifications		(7,697	)		(837	)		895			(27	)		(7,666	)
Amounts reclassified from accumulated OCI		—			639			521			—			1,160
Net current-period other comprehensive income		(7,697	)		(198	)		1,416			(27	)		(6,506	)
Balance at March 28, 2015	$	(14,773	)	$	(1,151	)	$	(33,748	)	$	243		$	(49,429	)

	For the Quarter Ended March 29, 2014
(In thousands)	Cumulative Translation Adjustment			Unrealized (Losses)/Gains on Derivatives			Minimum Pension/OPEB Liability Adjustment			Unrealized Gains on Equity Investments			Total
Balance at December 28, 2013	$	(462	)	$	1,546		$	(12,158	)	$	255		$	(10,819	)
Other comprehensive income (loss) before reclassifications		1,162			(1,233	)		(107	)		(15	)		(193	)
Amounts reclassified from accumulated OCI		—			117			110			—			227
Net current-period other comprehensive income		1,162			(1,116	)		3			(15	)		34
Balance at March 29, 2014	$	700		$	430		$	(12,155	)	$	240		$	(10,785	)

Reclassification adjustments out of accumulated OCI

Reclassification adjustments out of accumulated OCI were as follows:

	Amount reclassified from AOCI
	For the Quarter Ended
(In thousands)	March 28, 2015			March 29, 2014			Affected line item
Unrealized losses/(gains) on derivatives:
Commodity contracts	$	762		$	357		Cost of goods sold
Foreign currency contracts		—			(276	)	Depreciation Expense
Interest rate swap		106			—		Interest expense
		(229	)		36		Income tax (expense) benefit
		639			117		Net of tax
		—			—		Noncontrolling interest
	$	639		$	117		Net of tax and noncontrolling   interest
Amortization of net loss and prior service cost on employee benefit plans	$	719		$	124		Selling, general, and administrative   expense
		(198	)		(14	)	Income tax expense
		521			110		Net of tax
		—			—		Noncontrolling interest
	$	521		$	110		Net of tax and noncontrolling   interest

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Benefits Plans (Tables)

3 Months Ended

Mar. 28, 2015

Benefits Plans [Abstract]

Components of net periodic benefit costs

The components of net periodic benefit cost (income) are as follows:

	For the Quarter Ended
(In thousands)	March 28, 2015			March 29, 2014
Pension benefits:
Service cost	$	272		$	222
Interest cost		2,054			2,068
Expected return on plan assets		(2,654	)		(3,201	)
Amortization of net loss		714			188
Net periodic benefit cost (income)	$	386		$	(723	)
Other benefits:
Service cost	$	96		$	89
Interest cost		196			177
Amortization of prior service cost		2			—
Amortization of net loss (gain)		3			(64	)
Net periodic benefit cost	$	297		$	202

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Document and Entity Information	3 Months Ended
	Mar. 28, 2015	Apr. 20, 2015
Document and Entity Information [Abstract]
Entity Registrant Name	MUELLER INDUSTRIES INC
Entity Central Index Key	0000089439
Current Fiscal Year End Date	--12-26
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		56,969,586
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 28, 2015

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Derivative Instruments and Hedging Activities (Tables)

3 Months Ended

Mar. 28, 2015

Derivative Instruments and Hedging Activities [Abstract]

Derivative instruments designated as cash flow hedges reflected in the financial statements

The following table summarizes the location and fair value of the derivative instruments and disaggregates our net derivative assets and liabilities into gross components on a contract-by-contract basis:

	Asset Derivatives							Liability Derivatives
		Fair Value							Fair Value
(In thousands)	Balance Sheet Location	March 28, 2015			December 27, 2014			Balance Sheet Location	March 28, 2015			December 27, 2014
Hedging instrument:
Commodity contracts - gains	Other current assets	$	941		$	99		Other current liabilities	$	310		$	15
Commodity contracts - losses	Other current assets		(102	)		(4	)	Other current liabilities		(614	)		(832	)
Foreign currency contracts	Other current assets		—			—		Other current liabilities		(9	)		(81	)
Interest rate swap	Other assets		—			—		Other liabilities		(2,436	)		(927	)
Total derivatives (1)		$	839		$	95			$	(2,749	)	$	(1,825	)
(1) Does not include the impact of cash collateral provided to counterparties.

Schedule of fair value hedges

The following tables summarize the effects of derivative instruments in our Condensed Consolidated Statements of Income:

		Three Months Ended
(In thousands)	Location	March 28, 2015			March 29, 2014
Fair value hedges:
Gain on commodity contracts (qualifying)	Cost of goods sold	$	213		$	6,291
Loss on hedged item - Inventory	Cost of goods sold		(247	)		(5,800	)
Undesignated derivatives:
Gain on commodity contracts (nonqualifying)	Cost of goods sold	$	234		$	1,538

Summary of activities related to derivative instruments classified as cash flow hedges

The following tables summarize amounts recognized in and reclassified from AOCI during the period:

	Three Months Ended March 28, 2015
(In thousands)	Gain (Loss) Recognized in AOCI (Effective Portion), Net of Tax			Classification Gains (Losses)		Loss (Gain) Reclassified from AOCI (Effective Portion), Net of Tax
Cash flow hedges:
Commodity contracts	$	274		Cost of goods sold	$	571
Foreign currency contracts		(55	)	Depreciation expense		—
Interest rate swap		(1,032	)	Interest expense		68

	Three Months Ended March 29, 2014
(In thousands)	(Loss) Gain Recognized in AOCI (Effective Portion), Net of Tax			Classification Gains (Losses)		Loss (Gain) Reclassified from AOCI (Effective Portion), Net of Tax
Cash flow hedges:
Commodity contracts	$	(1,010	)	Cost of goods sold	$	291
Foreign currency contracts		22		Depreciation expense		(174	)
Interest rate swap		(245	)	Interest expense		—