Mueller Water Products (MWA) 10-Q 6 Feb 15 2015 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	3 Months Ended
	Dec. 31, 2014	Jan. 31, 2015	Mar. 31, 2013
Document And Entity Information [Abstract]
Document Fiscal Period Focus	Q1
Document Period End Date	31-Dec-14
Document Fiscal Year Focus	2015
Entity Well-known Seasoned Issuer	No
Entity Registrant Name	Mueller Water Products, Inc.
Entity Central Index Key	1350593
Current Fiscal Year End Date	-21
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Amendment Flag	FALSE
Entity Common Stock, Shares Outstanding		160,744,136
Entity Public Float			$1,484,364,255

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Dec. 31, 2014	Sep. 30, 2014
In Millions, unless otherwise specified
Assets:
Cash and cash equivalents	$45.10	$161.10
Receivables, net	138.8	182.1
Inventories	217.3	198
Deferred income taxes	35.6	38.6
Other current assets	53.1	44.1
Total current assets	489.9	623.9
Property, plant and equipment, net	143.4	146.3
Identifiable intangible assets	526.4	533.6
Other noncurrent assets	17.3	13.3
Total assets	1,177	1,317.10
Liabilities and stockholders' equity:
Current portion of long-term debt	6.1	46.2
Accounts payable	76.7	116
Other current liabilities	59.5	82.2
Total current liabilities	142.3	244.4
Long-term debt	493.5	499.4
Deferred income taxes	142.3	150.4
Other noncurrent liabilities	74.5	71.3
Total liabilities	852.6	965.5
Common Stock	1.6	1.6
Additional paid-in capital	1,581.20	1,582.80
Accumulated deficit	-1,193.90	-1,173.70
Accumulated Other Comprehensive Income (Loss), Net of Tax	-66	-60.7
Total stockholders' equity	322.9	350
Noncontrolling interest	1.5	1.6
Total equity	324.4	351.6
Total liabilities and stockholders' equity	$1,177	$1,317.10

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical)	Dec. 31, 2014	Sep. 30, 2013
Statement of Financial Position [Abstract]
Series A common stock, shares authorized	600,000,000	600,000,000
Series A common stock, shares outstanding	160,601,903	159,760,671

Consolidated_Statements_Of_Ope

Consolidated Statements Of Operations (USD $)	3 Months Ended
In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Net sales	$261.80	$257.40
Cost of sales	190.5	190.3
Gross profit	71.3	67.1
Operating expenses:
Selling, general and administrative	55	53
Restructuring	8.2	0.1
Total operating expenses	63.2	53.1
Operating income	8.1	14
Interest expense, net	9.4	12.6
Loss on early extinguishment of debt	31.3	0
Income (loss) before income taxes	-32.6	1.4
Income tax expense (benefit)	-12.4	0.3
Net income (loss)	($20.20)	$1.10
Net loss per basic share:
Net income (loss) per basic share	($0.13)	$0.01
Net loss per diluted share:
Net income (loss) per diluted share	($0.13)	$0.01
Weighted average shares outstanding:
Basic, in shares	160.1	158.5
Diluted, in shares	160.1	161.7
Dividends declared per share, in dollars per share	$0.02	$0.02

Consolidated_Statement_of_Comp

Consolidated Statement of Comprehensive Income Statement (USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Net Income (Loss) Attributable to Parent	($20.20)	$1.10
Other comprehensive income (loss):
Minimum pension liability	-5.2	-4.9
Income tax effects	2	1.9
Foreign currency translation	-2.1	-2
Other Comprehensive Income (Loss), Net of Tax	-5.3	-5
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	($25.50)	($3.90)

Consolidated_Statement_Of_Stoc

Consolidated Statement Of Stockholders' Equity (USD $)	Total	Common stock	Additional paid-in capital	Accumulated deficit	Accumulated other comprehensive income (loss)	Noncontrolling Interest [Member]
In Millions, unless otherwise specified
Balance at Sep. 30, 2014	$351.60	$1.60	$1,582.80	($1,173.70)	($60.70)	$1.60
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared	-2.8	0	-2.8	0	0	0
Stock-based compensation	1.9	0	1.9	0	0	0
Shares retained for employee taxes	-2.2	0		0	0	0
Stock issued under stock compensation plans	1.5	0	1.5	0	0	0
Other Comprehensive Income (Loss), Net of Tax	-5.3	0	0	0	-5.3	0
Net Income (Loss) Attributable to Parent	-20.2	0	0		0
Net Income (Loss) Attributable to Noncontrolling Interest						-0.1
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	-20.3
Balance at Dec. 31, 2014	$324.40	$1.60	$1,581.20	($1,193.90)	($66)	$1.50

Consolidated_Statements_Of_Cas

Consolidated Statements Of Cash Flows (USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net Income (Loss) Attributable to Parent	($20.20)	$1.10
Adjustments to reconcile net income (loss) to income (loss) from continuing operations:
Depreciation	7	6.8
Amortization	7.3	7.9
Loss on early extinguishment of debt	31.3	0
Stock-based compensation expense	1.9	2.4
Deferred income taxes	-4	0.1
Retirement plans	0.1	0.4
Other, net	3.8	0.5
Changes in assets and liabilities, net of acquisitions:
Receivables	41.3	29.7
Inventories	-21.6	-6.1
Other current assets and other noncurrent assets	-0.7	0.2
Accounts payable and other liabilities	-73.3	-46.8
Net cash provided by (used in) operating activities	-27.1	-3.8
Investing activities:
Capital expenditures	-7.2	-7.5
Acquisitions, net of cash acquired	0.3	0
Proceeds from Sale of Productive Assets	3.6	0.2
Early repayment of debt	-570.2	0
Net cash provided by (used in) investing activities	-3.3	-7.3
Financing activities:
Debt borrowings	497.5	0
Dividends paid	-2.8	-2.8
Common stock issued	1.5	0.9
Shares retained for employee taxes	-2.2	-3
Payments of Debt Issuance Costs	7.9	0
Other	-0.2	0.4
Net cash used in financing activities	-84.3	-4.5
Effect of currency exchange rate changes on cash	-1.3	-1.2
Net change in cash and cash equivalents	-116	-16.8
Cash and cash equivalents at beginning of period	161.1	123.6
Cash and cash equivalents at end of period	$45.10	$106.80

Income_Taxes

Income Taxes	3 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes
	At the beginning of 2013, we had valuation allowances related to our deferred tax assets. We reevaluate the need for a valuation allowance against our U.S. deferred tax assets each quarter, considering results to date, projections of taxable income, tax planning strategies and reversing taxable temporary differences. In the 2014 fourth quarter, based on our expectation of future taxable income, we credited to income substantially all of this valuation allowance.
	At December 31, 2014 and September 30, 2014, the gross liabilities for unrecognized income tax benefits were $2.6 million and $2.7 million, respectively.
	We recognize interest related to uncertain income tax positions as interest expense and would recognize any penalties that may be incurred as selling, general and administrative expenses. At December 31, 2014 and September 30, 2014, we had $0.6 million and $0.7 million, respectively, of accrued interest liabilities related to uncertain tax positions.
	Our state income tax returns are generally closed for years prior to 2006, except to the extent of our state net operating loss carryforwards. Our Canadian income tax returns are generally closed for years prior to 2006. We are currently under audit by several states at various levels of completion. We do not have any material unpaid assessments.

Organization

Organization	3 Months Ended
	Dec. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization	Organization
	Mueller Water Products, Inc., a Delaware corporation, together with its consolidated subsidiaries, operates in two business segments: Mueller Co. and Anvil. Mueller Co. manufactures valves for water and gas systems, including butterfly, iron gate, tapping, check, knife, plug and ball valves, as well as dry-barrel and wet-barrel fire hydrants and metering systems, and provides leak detection and pipe condition assessment products and services for the water infrastructure industry. Anvil manufactures and sources a broad range of products, including a variety of fittings, couplings, hangers and related products. The “Company,” “we,” “us” or “our” refer to Mueller Water Products, Inc. and its subsidiaries. With regard to the Company's segments, “we,” “us” or “our” may also refer to the segment being discussed.
	In July 2014, Mueller Co. acquired a 49% ownership interest in an industrial valve joint venture for $1.7 million. Due to substantive control features in the operating agreement, all of the joint venture's assets, liabilities and results of operations are included in our consolidated financial statements. In the three months ended December 31, 2014, we included an adjustment for the loss attributable to noncontrolling interest in selling, general and administrative expenses. Noncontrolling interest is recorded at its carrying value, which approximates fair value.
	Unless the context indicates otherwise, whenever we refer to a particular year, we mean our fiscal year ended or ending September 30 in that particular calendar year.
	Our consolidated financial statements are prepared in conformity with accounting principles generally accepted in the United States of America (“GAAP”), which require us to make certain estimates and assumptions that affect the reported amounts of assets, liabilities, sales and expenses and the disclosure of contingent assets and liabilities for the reporting periods. Actual results could differ from those estimates. All significant intercompany balances and transactions have been eliminated. In our opinion, all normal and recurring adjustments that we consider necessary for a fair financial statement presentation have been made. Certain reclassifications have been made to previously reported amounts to conform to the current presentation. The condensed consolidated balance sheet data at September 30, 2014 was derived from audited financial statements, but does not include all disclosures required by GAAP.
	In May 2014, the Financial Accounting Standards Board issued new guidance for the recognition of revenue.  This new guidance applies to us beginning with our first quarter of fiscal 2018 and early adoption is not permitted.  We are in the early stages of evaluating the impact of the adoption of this guidance on our future financial statements and related disclosures and we have not yet reached any conclusions.

Borrowing_Arrangements

Borrowing Arrangements	3 Months Ended
	Dec. 31, 2014
Long-term Debt and Capital Lease Obligations [Abstract]
Borrowing Arrangements	Borrowing Arrangements
	The components of our long-term debt are presented below.
		December 31,			September 30,
		2014			2014
		(in millions)
	ABL Agreement	$	—		$	—
	Term Loan	497.5			—
	Senior Unsecured Notes	—			178.3
	Senior Subordinated Notes	—			365
	Other	2.1			2.3
		499.6			545.6
	Less current portion	(6.1		)	(46.2		)
	Long-term debt	$	493.5		$	499.4
	On November 25, 2014, we entered into a $500.0 million senior secured term loan (“Term Loan”). The proceeds from the Term Loan, along with other cash, were used to fund the prepayment of our 7.375% Senior Subordinated Notes (“Senior Subordinated Notes”) and 8.75% Senior Unsecured Notes (“Senior Unsecured Notes”) and the satisfaction and discharge of our obligations under the respective indentures. We recorded a loss on early extinguishment of debt of $31.3 million, which consisted of $25.2 million of tender and call premiums and $4.4 million of deferred finance fees and $1.7 million of unamortized discount written off. We capitalized $7.9 million of debt issuance costs, which will be amortized over the term of the Term Loan using the effective interest rate method.
	ABL Agreement. At December 31, 2014, our asset based lending agreement (“ABL Agreement”) consisted of a revolving credit facility for up to $225 million of revolving credit borrowings, swing line loans and letters of credit. The ABL Agreement permits us to increase the size of the credit facility by an additional $150 million in certain circumstances subject to adequate borrowing base availability. We may borrow up to $25 million through swing line loans and may have up to $60 million of letters of credit outstanding.
	Borrowings under the ABL Agreement bear interest at a floating rate equal to LIBOR plus a margin ranging from 175 to 225 basis points, or a base rate, as defined in the ABL Agreement, plus a margin ranging from 75 to 125 basis points. At December 31, 2014, the applicable rate was LIBOR plus 175 basis points.
	The ABL Agreement terminates on December 18, 2017. We pay a commitment fee for any unused borrowing capacity under the ABL Agreement of either 37.5 basis points per annum or 25 basis points per annum, based on daily average availability during the previous calendar quarter. At December 31, 2014, our commitment fee was 37.5 basis points. Our obligations under the ABL Agreement are secured by a first-priority perfected lien on all of our U.S. receivables and inventories, certain cash and other supporting obligations. Borrowings are not subject to any financial maintenance covenants unless excess availability is less than the greater of $22.5 million and 10% of the aggregate commitments under the ABL Agreement. Excess availability based on December 31, 2014 data, as reduced by outstanding letters of credit and accrued fees and expenses of $29.2 million, was $138.3 million.
	Term Loan. The Term Loan accrues interest at a floating rate equal to LIBOR, subject to a floor of 0.75%, plus 325 basis points. We may voluntarily repay amounts borrowed under the Term Loan at any time. The principal amount of the Term Loan is required to be repaid in quarterly installments, commencing in March 2015, of $1.25 million with any remaining principal due on November 25, 2021. The Term Loan is guaranteed by substantially all of our U.S. subsidiaries and is secured by essentially all of our assets, though the ABL Agreement has a senior claim on certain collateral securing borrowings thereunder. The Term Loan is reported net of unamortized discount of $2.5 million. Based on quoted market prices, the outstanding Term Loan had a fair value of $500.3 million at December 31, 2014.
	The Term Loan contains affirmative and negative operating covenants applicable to us and our restricted subsidiaries. We believe we were compliant with these covenants at December 31, 2014 and expect to remain in compliance through December 31, 2015.

Retirement_Plans

Retirement Plans	3 Months Ended
	Dec. 31, 2014
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]
Retirement Plans	Retirement Plans
	The components of net periodic benefit cost allocated to continuing operations for defined benefit pension plans are as follows.
		Three months ended
		December 31,
		2014			2013
		(in millions)
	Service cost	$	0.5		$	0.4
	Interest cost	5			5
	Expected return on plan assets	(6.2		)	(5.9		)
	Amortization of actuarial net loss	0.8			0.9
	Net periodic benefit cost	$	0.1		$	0.4
	The amortization of actuarial losses, net of tax, is recorded as a component of other comprehensive income (loss).
	We contributed $1 million to our Canadian pension plans during the quarter ended December 31, 2014. For financial reporting purposes, our pension plan obligations were 89% funded at September 30, 2014.

Stockbased_Compensation_Plans

Stock-based Compensation Plans	3 Months Ended
	Dec. 31, 2014
Share-based Compensation [Abstract]
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]
	ote 6.	Stock-based Compensation Plans
	From time to time, we grant various forms of stock-based compensation, including stock options, restricted stock units and both cash-settled and stock-settled performance-based restricted stock units ("PRSUs") under our Amended and Restated 2006 Mueller Water Products, Inc. Stock Incentive Plan (the “2006 Stock Plan”).
	PRSUs represent a target number of units that may be paid out at the end of a multi-year award cycle consisting of annual performance periods coinciding with our fiscal years. As determined at the date of grant, PRSUs may settle in cash-value equivalent of, or directly in, shares of our common stock. Settlement will range from zero to two times the number of PRSUs granted, depending on our financial performance against predetermined targets.
	The cash-settled PRSUs granted in the quarter ended December 31, 2012 settled in the quarter ended December 31, 2014 for $4.0 million.
	The stock-settled PRSUs granted in the quarters ended December 31, 2012, 2013 and 2014 will settle in the quarters ending December 31, 2015, 2016, and 2017, respectively. The stock prices used to value the awards were $5.22 for the 2013 performance period, $8.52 for the 2014 performance period and $9.78 for the 2015 performance period.
	From time to time, we grant Phantom Plan awards under the Mueller Water Products, Inc. Phantom Plan (“Phantom Plan”). At December 31, 2014, the outstanding Phantom Plan awards had a fair value of $10.24 per award and our liability for Phantom Plan awards was $1.9 million.
	We granted stock-based compensation awards under the 2006 Stock Plan, the Mueller Water Products, Inc. 2006 Employee Stock Purchase Plan and the Phantom Plan during the three months ended December 31, 2014 as follows.
		Number granted	Weighted average grant date fair value per instrument		Total grant date fair value (in millions)
	Quarter ended December 31, 2014:
	Restricted stock units	378,036	$	9.78	$	3.7
	Employee stock purchase plan instruments	51,574	1.89		0.1
	Phantom Plan awards	289,524	9.78		2.8
	PRSUs	240,691	9.78		2.4
					$	9
	We recorded stock-based compensation expense of $3.4 million and $4.1 million during the three months ended December 31, 2014 and 2013, respectively. At December 31, 2014, there was approximately $9.7 million of unrecognized compensation expense related to stock-based awards.
	We recorded a net loss for the quarter ended December 31, 2014. Therefore, all stock-based compensation instruments were excluded from the diluted loss per share calculation since their inclusion would have been antidilutive. We excluded 1,127,281 instruments from the calculations of diluted earnings per share for the quarter ended December 31, 2013 because the effect of including such instruments would also have been antidilutive.

Supplemental_Balance_Sheet_Inf

Supplemental Balance Sheet Information	3 Months Ended
	Dec. 31, 2014
Balance Sheet Related Disclosures [Abstract]
Supplemental Balance Sheet Information	Selected supplemental balance sheet information is presented below.
		December 31,			September 30,
		2014			2014
		(in millions)
	Inventories:
	Purchased components and raw material	$	76.1		$	72
	Work in process	41.4			34.5
	Finished goods	99.8			91.5
		$	217.3		$	198
	Other current assets:
	Maintenance and repair tooling	$	22.3		$	22.6
	Income taxes	21.4			13
	Other	9.4			8.5
		$	53.1		$	44.1
	Property, plant and equipment:
	Land	$	9.6		$	9.6
	Buildings	76.8			78
	Machinery and equipment	329.1			332.9
	Construction in progress	19.3			18.7
		434.8			439.2
	Accumulated depreciation	(291.4		)	(292.9		)
		$	143.4		$	146.3
	Other current liabilities:
	Compensation and benefits	$	22.7		$	39.5
	Customer rebates	19.8			16.9
	Taxes other than income taxes	3.7			4.7
	Warranty	2.5			2.6
	Income taxes	0.7			0.7
	Interest	0.6			10.7
	Restructuring	1.3			0.9
	Environmental	2.5			0.1
	Other	5.7			6.1
		$	59.5		$	82.2

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive Loss	3 Months Ended
	Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]	Accumulated Other Comprehensive Loss
	Accumulated other comprehensive loss is presented below.
		Minimum pension liability, net of tax			Foreign currency translation			Total
	Balance at September 30, 2014	$	(63.1	)	$	2.4		$	(60.7	)
	Current period other comprehensive loss	(3.2		)	(2.1		)	(5.3		)
	Balance at December 31, 2014	$	(66.3	)	$	0.3		$	(66.0	)
	Accumulated other comprehensive loss is presented below.
		Minimum pension liability, net of tax			Foreign currency translation			Total
	Balance at September 30, 2014	$	(63.1	)	$	2.4		$	(60.7	)
	Current period other comprehensive loss	(3.2		)	(2.1		)	(5.3		)
	Balance at December 31, 2014	$	(66.3	)	$	0.3		$	(66.0	)

Segment_Information

Segment Information	3 Months Ended
	Dec. 31, 2014
Segment Reporting, Measurement Disclosures [Abstract]
Segment Reporting Disclosure [Text Block]	Segment Information
	Summarized financial information for our segments is presented below.
		Three months ended
		December 31,
		2014			2013
		(in millions)
	Net sales, excluding intercompany:
	Mueller Co.	$	164.7		$	165
	Anvil	97.1			92.4
		$	261.8		$	257.4
	Intercompany sales:
	Mueller Co.	$	1.9		$	1.6
	Anvil	—			—
		$	1.9		$	1.6
	Operating income (loss):
	Mueller Co.	$	9.5		$	15.9
	Anvil	7.2			7.3
	Corporate	(8.6		)	(9.2		)
		$	8.1		$	14
	Depreciation and amortization:
	Mueller Co.	$	10.6		$	11.1
	Anvil	3.6			3.5
	Corporate	0.1			0.1
		$	14.3		$	14.7
	Restructuring:
	Mueller Co.	$	8.1		$	0.1
	Anvil	—			—
	Corporate	0.1			—
		$	8.2		$	0.1
	Capital expenditures:
	Mueller Co.	$	4.6		$	4.4
	Anvil	2.6			3.1
	Corporate	—			—
		$	7.2		$	7.5

Commitments_and_Contingencies

Commitments and Contingencies	3 Months Ended
	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Commitments And Contingencies	Commitments and Contingencies
	We are involved in various legal proceedings that have arisen in the normal course of operations, including the proceedings summarized below. The effect of the outcome of these matters on our financial statements cannot be predicted with certainty as any such effect depends on the amount and timing of the resolution of such matters. Other than the litigation described below, we do not believe that any of our outstanding litigation will have a material adverse effect on our business or prospects.
	Environmental. We are subject to a wide variety of laws and regulations concerning the protection of the environment, both with respect to the operations at many of our properties and with respect to remediating environmental conditions that may exist at our own or other properties. We strive to comply with federal, state and local environmental laws and regulations. We accrue for environmental expenses resulting from existing conditions that relate to past operations when the costs are probable and reasonably estimable.
	In the acquisition agreement pursuant to which a predecessor to Tyco sold our Mueller Co. and Anvil businesses to the prior owners of these businesses in August 1999, Tyco agreed to indemnify us and our affiliates, among other things, for all “Excluded Liabilities.” Excluded Liabilities include, among other things, substantially all liabilities relating to the time prior to August 1999, including environmental liabilities. The indemnity survives indefinitely. Tyco's indemnity does not cover liabilities to the extent caused by us or the operation of our businesses after August 1999, nor does it cover liabilities arising with respect to businesses or sites acquired after August 1999. Since 2007, Tyco has engaged in multiple corporate restructurings, split-offs and divestitures. While none of these transactions directly affects the indemnification obligations of the Tyco indemnitors under the 1999 acquisition agreement, the result of such transactions is that the assets of, and control over, such Tyco indemnitors has changed. Should any of these Tyco indemnitors become financially unable or fail to comply with the terms of the indemnity, we may be responsible for such obligations or liabilities.
	In September 1987, we implemented an Administrative Consent Order (“ACO”) for our Burlington, New Jersey property, which was required under the New Jersey Environmental Cleanup Responsibility Act (now known as the Industrial Site Recovery Act). The ACO required soil and ground-water cleanup, and we completed, and received final approval on, the soil cleanup required by the ACO. We retained this property upon the sale of our former U.S. Pipe segment. We expect ground-water issues as well as issues associated with the demolition of former manufacturing facilities at this site will continue and remediation by us could be required. Long-term ground-water monitoring may also be required, but we do not know how long such monitoring would be required and do not believe monitoring or further remediation costs, if any, will have a material adverse effect on our financial statements.
	On July 13, 2010, Rohcan Investments Limited, the former owner of property leased by Mueller Canada Ltd. and located in Milton, Ontario, filed suit against Mueller Canada Ltd. and its directors seeking C$10.0 million in damages arising from the defendants' alleged environmental contamination of the property and breach of lease. Mueller Canada Ltd. leased the property from 1988 through 2008. We are pursuing indemnification from a former owner for certain potential liabilities that are alleged in this lawsuit, and we have accrued for other liabilities not covered by indemnification.  On December 7, 2011, the Court denied the plaintiff's motion for summary judgment.
	Walter Energy-related Income Taxes. Each member of a consolidated group for federal income tax purposes is severally liable for the federal income tax liability of each other member of the consolidated group for any year in which it is a member of the group at any time during such year. Each member of the Walter Energy consolidated group, which included us through December 14, 2006, is also jointly and severally liable for pension and benefit funding and termination liabilities of other group members, as well as certain benefit plan taxes. Accordingly, we could be liable under such provisions in the event any such liability is incurred, and not discharged, by any other member of the Walter Energy consolidated group for any period during which we were included in the Walter Energy consolidated group.
	A dispute exists with regard to federal income taxes for 1980 through 1994 allegedly owed by the Walter Energy consolidated group. According to Walter Energy's last available public filing on the matter, Walter Energy's management estimated that the amount of tax claimed by the IRS was approximately $34.0 million for issues currently in dispute in bankruptcy court for matters unrelated to us. This amount is subject to interest and penalties. Of the $34.0 million in claimed tax, $21.0 million represents issues in which the IRS is not challenging the deductibility of the particular expense but only whether such expense is deductible in a particular year. Walter Energy's management believes that Walter Energy's financial exposure should be limited to interest and possible penalties and the amount of any tax claimed will be offset by favorable adjustments in other years.
	In addition, the IRS previously issued a Notice of Proposed Deficiency assessing additional tax of $82.2 million for the fiscal years ended May 31, 2000 through December 31, 2005. Walter Energy filed a formal protest with the IRS, but had not reached a final resolution with the Appeals Division at December 31, 2014. The unresolved issues relate primarily to Walter Energy's method of recognizing revenue on the sale of homes and related interest on the installment notes receivable. The items at issue relate primarily to the timing of revenue recognition and consequently, should the IRS prevail on its positions, Walter Energy's financial exposure should be limited to interest and penalties. As a matter of law, we are jointly and severally liable for any final tax determination for any year in which any of our subsidiaries were members of the Walter Energy consolidated group, which means that we would be liable in the event Walter Energy is unable to pay any amounts owed. Walter Energy has disclosed that it believes its filing positions have substantial merit and that it intends to defend vigorously any claims asserted.
	Walter Energy effectively controlled all of our tax decisions for periods during which we were a member of the Walter Energy consolidated group for federal income tax purposes and certain combined, consolidated or unitary state and local income tax groups. Under the terms of the income tax allocation agreement between us and Walter Energy dated May 26, 2006, we generally compute our tax liability on a stand-alone basis, but Walter Energy has sole authority to respond to and conduct all tax proceedings (including tax audits) relating to our federal income and combined state tax returns, to file all such tax returns on our behalf and to determine the amount of our liability to (or entitlement to payment from) Walter Energy for such previous periods. This arrangement may result in conflicts between Walter Energy and us.
	Our separation from Walter Energy on December 14, 2006 was intended to qualify as a tax-free spin-off under Section 355 of the Internal Revenue Code. In addition, the tax allocation agreement provides that if the spin-off is determined not to be tax-free pursuant to Section 355, we generally will be responsible for any taxes incurred by Walter Energy or its shareholders if such taxes result from certain of our actions or omissions and for a percentage of any such taxes that are not a result of our actions or omissions or Walter Energy's actions or omissions or taxes based upon our market value relative to Walter Energy's market value. Additionally, to the extent that Walter Energy was unable to pay taxes, if any, attributable to the spin-off and for which it is responsible under the tax allocation agreement, we could be liable for those taxes as a result of being a member of the Walter Energy consolidated group for the year in which the spin-off occurred.
	In accordance with the income tax allocation agreement, Walter Energy used certain tax assets of one of our predecessors in its calendar 2006 tax return for which payment to us is required. The income tax allocation agreement only requires Walter Energy to make the payment upon realization of the tax benefit by receiving a refund or otherwise offsetting taxes due. Walter Energy currently owes us $11.6 million, which includes recent tax audit and amended tax return adjustments, that is payable pending completion of an IRS audit of Walter Energy's 2006 tax year and the related refund of tax from that year. This receivable is included in other current assets at December 31, 2014.
	Indemnifications. We are a party to contracts in which it is common for us to agree to indemnify third parties for certain liabilities that arise out of or relate to the subject matter of the contract. In some cases, this indemnity extends to related liabilities arising from the negligence of the indemnified parties, but usually excludes any liabilities caused by gross negligence or willful misconduct. We cannot estimate the potential amount of future payments under these indemnities until events arise that would trigger a liability under the indemnities.
	Additionally, in connection with the sale of assets and the divestiture of businesses, such as the divestiture of our U.S. Pipe segment, we may agree to indemnify buyers and related parties for certain losses or liabilities incurred by these parties with respect to: (i) the representations and warranties made by us to these parties in connection with the sale and (ii) liabilities related to the pre-closing operations of the assets or business sold. Indemnities related to pre-closing operations generally include certain environmental and tax liabilities and other liabilities not assumed by these parties in the transaction.
	Indemnities related to the pre-closing operations of sold assets or businesses normally do not represent additional liabilities to us, but simply serve to protect these parties from potential liability associated with our obligations existing at the time of the sale. As with any liability, we have accrued for those pre-closing obligations that are considered probable and reasonably estimable. Should circumstances change, increasing the likelihood of payments related to a specific indemnity, we will accrue a liability when future payment is probable and the amount is reasonably estimable.
	Other Matters. Anvil is in a dispute with Victaulic Company (“Victaulic”) regarding two patents held by Victaulic, U.S. Patent 7,086,131 (the “131 Patent”) and U.S. Patent 7,712,796 (the “796 Patent” and collectively with the 131 Patent, the “U.S. Patents”), which Anvil believes are invalid. The U.S. Patents potentially relate to a coupling product currently manufactured and marketed by Anvil. Anvil filed multiple reexamination requests with the U.S. Patent and Trademark Office (the “PTO”) regarding the U.S. Patents, and the PTO granted the requests. Although the PTO examiner initially invalidated most of the claims of the 796 Patent, the PTO examiner affirmed the validity of the 796 Patent in September 2014. In October 2014, the PTO examiner rejected the original claim of the 131 Patent, but indicated the allowance of newly added claims that appear substantially similar to those included in the 796 Patent. The final PTO decisions with respect to the U.S. Patents will likely be appealed by Anvil and/or Victaulic. Relatedly, Anvil and Victaulic are engaged in lawsuits in the U.S. District Court for the Northern District of Georgia and in the Federal Court of Toronto, Ontario, Canada. The Georgia District Court litigation has been stayed pending the final outcome of the ongoing reexaminations of the U.S. Patents by the PTO. Although Anvil intends to continue to vigorously contest the validity of the U.S. Patents, as well as Victaulic’s related patents in Canada, and to defend itself against any counterclaims made by Victaulic, the probability of a favorable or unfavorable outcome with respect to these proceedings is unknown. Any number of potential outcomes is possible due to the multiple claims associated with the proceedings, each of which is in different stages and subject to appeal. Further, there are a number of highly complex factual and technical issues involved, and it is uncertain whether a favorable or unfavorable result with respect to a particular ruling or proceeding will impact the other matters in controversy. Accordingly, we have not recorded any accrual with respect to these proceedings and a range of liability is not reasonably estimable.
	We are party to a number of other lawsuits arising in the ordinary course of business, including product liability cases for products manufactured by us or third parties. We provide for costs relating to these matters when a loss is probable and the amount is reasonably estimable. Administrative costs related to these matters are expensed as incurred. The effect of the outcome of these matters on our future financial statements cannot be predicted with certainty as any such effect depends on the amount and timing of the resolution of such matters. While the results of litigation cannot be predicted with certainty, we believe that the final outcome of such other litigation is not likely to have a materially adverse effect on our business or prospects.

Subsequent_Events

Subsequent Events	3 Months Ended
	Dec. 31, 2014
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events
	On January 28, 2015, our board of directors declared a dividend of $0.0175 per share on our common stock, payable on or about February 20, 2015 to stockholders of record at the close of business on February 10, 2015.

Borrowing_Arrangements_Tables

Borrowing Arrangements (Tables)	3 Months Ended
	Dec. 31, 2014
Long-term Debt and Capital Lease Obligations [Abstract]
Components of Long-Term Debt	The components of our long-term debt are presented below.
		December 31,			September 30,
		2014			2014
		(in millions)
	ABL Agreement	$	—		$	—
	Term Loan	497.5			—
	Senior Unsecured Notes	—			178.3
	Senior Subordinated Notes	—			365
	Other	2.1			2.3
		499.6			545.6
	Less current portion	(6.1		)	(46.2		)
	Long-term debt	$	493.5		$	499.4

Retirement_Plans_Tables

Retirement Plans (Tables)	3 Months Ended
	Dec. 31, 2014
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]
Schedule of Net Periodic Benefit Cost	The components of net periodic benefit cost allocated to continuing operations for defined benefit pension plans are as follows.
		Three months ended
		December 31,
		2014			2013
		(in millions)
	Service cost	$	0.5		$	0.4
	Interest cost	5			5
	Expected return on plan assets	(6.2		)	(5.9		)
	Amortization of actuarial net loss	0.8			0.9
	Net periodic benefit cost	$	0.1		$	0.4

Stockbased_Compensation_Plans_

Stock-based Compensation Plans (Tables)	3 Months Ended
	Dec. 31, 2014
Share-based Compensation [Abstract]
Schedule of Share-based Compensation, Activity [Table Text Block]
		Number granted	Weighted average grant date fair value per instrument		Total grant date fair value (in millions)
	Quarter ended December 31, 2014:
	Restricted stock units	378,036	$	9.78	$	3.7
	Employee stock purchase plan instruments	51,574	1.89		0.1
	Phantom Plan awards	289,524	9.78		2.8
	PRSUs	240,691	9.78		2.4
					$	9

Supplemental_Balance_Sheet_Inf1

Supplemental Balance Sheet Information (Tables)	3 Months Ended
	Dec. 31, 2014
Balance Sheet Related Disclosures [Abstract]
Schedule Of Selected Supplemental Balance Sheet Information [Table Text Block]	ental balance sheet information is presented below.
		December 31,			September 30,
		2014			2014
		(in millions)
	Inventories:
	Purchased components and raw material	$	76.1		$	72
	Work in process	41.4			34.5
	Finished goods	99.8			91.5
		$	217.3		$	198
	Other current assets:
	Maintenance and repair tooling	$	22.3		$	22.6
	Income taxes	21.4			13
	Other	9.4			8.5
		$	53.1		$	44.1
	Property, plant and equipment:
	Land	$	9.6		$	9.6
	Buildings	76.8			78
	Machinery and equipment	329.1			332.9
	Construction in progress	19.3			18.7
		434.8			439.2
	Accumulated depreciation	(291.4		)	(292.9		)
		$	143.4		$	146.3
	Other current liabilities:
	Compensation and benefits	$	22.7		$	39.5
	Customer rebates	19.8			16.9
	Taxes other than income taxes	3.7			4.7
	Warranty	2.5			2.6
	Income taxes	0.7			0.7
	Interest	0.6			10.7
	Restructuring	1.3			0.9
	Environmental	2.5			0.1
	Other	5.7			6.1
		$	59.5		$	82.2

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Loss (Tables)	3 Months Ended
	Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Schedule Of Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss
	Accumulated other comprehensive loss is presented below.
		Minimum pension liability, net of tax			Foreign currency translation			Total
	Balance at September 30, 2014	$	(63.1	)	$	2.4		$	(60.7	)
	Current period other comprehensive loss	(3.2		)	(2.1		)	(5.3		)
	Balance at December 31, 2014	$	(66.3	)	$	0.3		$	(66.0	)
	Accumulated other comprehensive loss is presented below.
		Minimum pension liability, net of tax			Foreign currency translation			Total
	Balance at September 30, 2014	$	(63.1	)	$	2.4		$	(60.7	)
	Current period other comprehensive loss	(3.2		)	(2.1		)	(5.3		)
	Balance at December 31, 2014	$	(66.3	)	$	0.3		$	(66.0	)

Segment_Information_Tables

Segment Information (Tables)	3 Months Ended
	Dec. 31, 2014
Segment Reporting, Measurement Disclosures [Abstract]
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas
Schedule Of Selected Supplemental Balance Sheet Information	Summarized financial information for our segments is presented below.
		Three months ended
		December 31,
		2014			2013
		(in millions)
	Net sales, excluding intercompany:
	Mueller Co.	$	164.7		$	165
	Anvil	97.1			92.4
		$	261.8		$	257.4
	Intercompany sales:
	Mueller Co.	$	1.9		$	1.6
	Anvil	—			—
		$	1.9		$	1.6
	Operating income (loss):
	Mueller Co.	$	9.5		$	15.9
	Anvil	7.2			7.3
	Corporate	(8.6		)	(9.2		)
		$	8.1		$	14
	Depreciation and amortization:
	Mueller Co.	$	10.6		$	11.1
	Anvil	3.6			3.5
	Corporate	0.1			0.1
		$	14.3		$	14.7
	Restructuring:
	Mueller Co.	$	8.1		$	0.1
	Anvil	—			—
	Corporate	0.1			—
		$	8.2		$	0.1
	Capital expenditures:
	Mueller Co.	$	4.6		$	4.4
	Anvil	2.6			3.1
	Corporate	—			—
		$	7.2		$	7.5

Organization_Details

Organization (Details) (USD $)	0 Months Ended	3 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Jul. 31, 2014	Dec. 31, 2014	Sep. 30, 2014
Segment Reporting Information [Line Items]
Number of Reportable Segments		2
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage	49.00%
Payments to Acquire Interest in Joint Venture			$1.70

Income_Taxes_Narrative_Details

Income Taxes (Narrative) (Details) (USD $)	Dec. 31, 2014	Sep. 30, 2014
In Millions, unless otherwise specified
Income Tax Disclosure [Abstract]
Unrecognized Tax Benefits	$2.60	$2.70
Accrued interest related to uncertain tax positions	$0.60	$0.70

Income_Taxes_Parenthetical_Det

Income Taxes (Parenthetical) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014
Income Tax Disclosure [Abstract]
Income Tax Examination, Penalties and Interest Expense	$0

Discontinued_Operations_Assets

Discontinued Operations, Assets Held for Sale and Divestitures (Narrative) (Details) (USD $)	3 Months Ended			12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Jun. 30, 2013	Sep. 30, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Restructuring	$8.20	$0.10
Proceeds from Sale of Productive Assets	3.6	0.2
Net sales	261.8	257.4
St. Jerome [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Restructuring	7.2
Disposal Group, Including Discontinued Operation, Operating Income (Loss)			2.5
Environmental Remediation Expense	2.3
Severance Costs	2.4
Net sales				$11.50

Borrowing_Arrangements_Narrati

Borrowing Arrangements (Narrative) (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Sep. 30, 2014	Sep. 30, 2013
Borrowing rate in addition to LIBOR	32500.00%
Debt Instrument, Date of First Required Payment	1-Mar-15
Cash and cash equivalents	$45.10	$106.80	$161.10	$123.60
Loss on early extinguishment of debt	31.3	0
Gain (Loss) on Repurchase of Debt Instrument	-25.2
Write off of Deferred Debt Issuance Cost	4.4
Write off of Unamortized Discount	1.7
Payments of Debt Issuance Costs	7.9	0
Debt Instrument, Unamortized Discount	2.5
Domestic Line of Credit [Member]
Revolving credit facility amount	-225
Potential increase size of the credit facility by an additional amount	150
Line of Credit Facility, Interest Rate at Period End	17500.00%
Agreement termination date	18-Dec-17
Aggregate commitments availability	22.5
Aggregate commitments availability, percentage	10.00%
Outstanding letter of credit accrued fees and expenses	29.2
Excess availability reduced by outstanding borrowings, outstanding letters of credit and accrued fees and expenses	138.3
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	3750.00%
Swing Line Loans [Member]
Revolving credit facility amount	-25
Letters Of Credit Outstanding [Member]
Revolving credit facility amount	-60
Secured Debt [Member]
Long-term Debt, Gross	500
Debt Instrument, Periodic Payment, Principal	1.25
Agreement termination date	25-Nov-21
Financial Liabilities Fair Value Disclosure	$500.30
Minimum [Member] | Domestic Line of Credit [Member]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	2500.00%
Maximum [Member] | Domestic Line of Credit [Member]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	3750.00%
London Interbank Offered Rate (LIBOR) [Member] | Secured Debt [Member]
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum	0.75%
London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member] | Long-term Debt [Member]
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum	7500.00%
London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member] | Domestic Line of Credit [Member]
Borrowing rate in addition to LIBOR	17500.00%
London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member] | Domestic Line of Credit [Member]
Borrowing rate in addition to LIBOR	22500.00%
Base Rate [Member] | Maximum [Member] | Domestic Line of Credit [Member]
Borrowing rate in addition to LIBOR	12500.00%

Borrowing_Arrangements_Compone

Borrowing Arrangements (Components Of Long-Term Debt) (Details) (USD $)	Dec. 31, 2014	Sep. 30, 2014
In Millions, unless otherwise specified
Debt instrument	$499.60	$545.60
Current portion of long-term debt	-6.1	-46.2
Long-term debt	493.5	499.4
Domestic Line of Credit [Member]
Debt instrument	0	0
Secured Debt [Member]
Debt instrument	497.5	0
Senior Notes [Member]
Debt instrument	0	178.3
Senior Subordinated Notes [Member]
Debt instrument	0	365
Other [Member]
Debt instrument	$2.10	$2.30

Retirement_Plans_Narrative_Det

Retirement Plans (Narrative) (Details) (USD $)	3 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014
Decrease in accumulated other comprehensive loss net of tax	($3.20)
Defined Benefit Plan, Funded Percentage		89.00%
UNITED STATES
Defined Benefit Plan, Contributions by Employer		$1

Retirement_Plans_Net_Periodic_

Retirement Plans (Net Periodic Benefit Cost) (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan, Service Cost	$0.50	$0.40
Defined Benefit Plan, Interest Cost	5	5
Defined Benefit Plan, Expected Return on Plan Assets	-6.2	-5.9
Amortization of actuarial net loss	0.8	0.9
Net periodic benefit cost	$0.10	$0.40

Stockbased_Compensation_Plans_1

Stock-based Compensation Plans (Narrative) (Details) (USD $)	3 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2014	Jun. 30, 2013	Dec. 31, 2013	Dec. 31, 2012
Allocated Share-based Compensation Expense	$3.40	$4.10
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	9.7
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		1,127,281
Phantom Share Units (PSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	289,524
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Intrinsic Value, Amount Per Share	$10.24
Share-based compensation liability	1.9
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	240,691
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	$9.78		$8.52	$5.22
Cash-settled Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Share-based Liabilities Paid	$4
Minimum [Member] | Performance Shares [Member]
Performance Factor	0
Maximum [Member] | Performance Shares [Member]
Performance Factor	2

Stockbased_Compensation_Plans_2

Stock-based Compensation Plans Grants Table (USD $)	3 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Granted, Value, Share-based Compensation, Gross	$9
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, shares	378,036
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value	$9.78
Stock Granted, Value, Share-based Compensation, Gross	3.7
Employee Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, shares	51,574
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value	$1.89
Stock Granted, Value, Share-based Compensation, Gross	0.1
Phantom Share Units (PSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, shares	289,524
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value	$9.78
Stock Granted, Value, Share-based Compensation, Gross	2.8
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, shares	240,691
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value	$9.78
Stock Granted, Value, Share-based Compensation, Gross	$2.40

Supplemental_Balance_Sheet_Inf2

Supplemental Balance Sheet Information (Schedule Of Selected Supplemental Balance Sheet Information) (Details) (USD $)	Dec. 31, 2014	Sep. 30, 2014
In Millions, unless otherwise specified
Inventories:
Purchased components and raw material	$76.10	$72
Work in process	41.4	34.5
Finished goods	99.8	91.5
Inventories, net	217.3	198
Other current assets:
Maintenance and repair tooling	22.3	22.6
Prepaid income taxes	21.4	13
Other	9.4	8.5
Other current assets	53.1	44.1
Property, plant and equipment:
Land	9.6	9.6
Buildings	76.8	78
Machinery and equipment	329.1	332.9
Construction in progress	19.3	18.7
Property, plant and equipment, gross	434.8	439.2
Accumulated depreciation	-291.4	-292.9
Property, plant and equipment net	143.4	146.3
Other current liabilities:
Compensation and benefits	22.7	39.5
Customer rebates	19.8	16.9
Interest	0.6	10.7
Taxes other than income taxes	3.7	4.7
Warranty	2.5	2.6
Income taxes	0.7	0.7
Restructuring	1.3	0.9
Environmental	2.5	0.1
Other	5.7	6.1
Other current liabilities	$59.50	$82.20

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Loss (Schedule Of Accumulated Other Comprehensive Loss) (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	($2.40)
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	-63.1
Accumulated Other Comprehensive Income (Loss), Net of Tax	-60.7
Foreign currency translation	-2.1	-2
Minimum pension liability, net of tax	-3.2
Other Comprehensive Income (Loss), Net of Tax	-5.3	-5
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	-0.3
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	-66.3
Accumulated Other Comprehensive Income (Loss), Net of Tax	($66)

Segment_Information_Narrative_

Segment Information (Narrative) (Details)	3 Months Ended
	Dec. 31, 2014
Segment Reporting [Abstract]
Number of Reportable Segments	2

Segment_Information_Schedule_O

Segment Information (Schedule Of Selected Supplemental Balance Sheet Information) (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Sep. 30, 2014
Segment Reporting Information [Line Items]
Net sales, excluding intercompany	$261.80	$257.40
2013	1.9	1.6
Operating income	8.1	14
Depreciation and amortization	14.3	14.7
Restructuring	8.2	0.1
Payments to Acquire Productive Assets	7.2	7.5
Total assets	1,177		1,317.10
Intangible intangible assets, net	526.4		533.6
Mueller Co. [Member]
Segment Reporting Information [Line Items]
Net sales, excluding intercompany	164.7	165
2013	1.9	1.6
Operating income	9.5	15.9
Depreciation and amortization	10.6	11.1
Restructuring	8.1	0.1
Payments to Acquire Productive Assets	4.6	4.4
Anvil [Member]
Segment Reporting Information [Line Items]
Net sales, excluding intercompany	97.1	92.4
2013	0	0
Operating income	7.2	7.3
Depreciation and amortization	3.6	3.5
Restructuring	0	0
Payments to Acquire Productive Assets	2.6	3.1
Corporate [Member]
Segment Reporting Information [Line Items]
Operating income	-8.6	-9.2
Depreciation and amortization	0.1	0.1
Payments to Acquire Productive Assets	$0	$0

Commitments_and_Contingencies_

Commitments and Contingencies (Details)	3 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Sep. 30, 2014	Dec. 31, 2014	Dec. 31, 2014
	USD ($)	CAD	USD ($)	CAD	Prior To 1995 [member]	From 2000 to 2005 [Member]
					USD ($)	USD ($)
Loss Contingency, Damages Sought, Value		10
Damages arising due to alleged environmental contamination of the property and breach of lease				10
Walter Energy tax assessment					34	82.2
Walter Energy tax assessment prior to 1995 related to timing	21
Amount payable pending completion of an IRS audit	11.6
Proceeds from Sale of Productive Assets	$3.60		$0.20

Subsequent_Events_Details

Subsequent Events (Details) (USD $)	3 Months Ended		0 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Feb. 20, 2015	Feb. 10, 2015	Jan. 29, 2015	Jan. 28, 2015
Subsequent Event [Line Items]
Dividends declared, in dollars per share	$0.02	$0.02
Subsequent Event [Member]
Subsequent Event [Line Items]
Dividends Payable, Date Declared						28-Jan-15
Dividends declared, in dollars per share					$0.02
Dividends Payable, Date to be Paid			20-Feb-15
Dividends Payable, Date of Record				10-Feb-15