Mueller Water Products (MWA) 10-Q 5 Aug 21 2021 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information	9 Months Ended
	Jun. 30, 2021
Document And Entity Information [Abstract]
Document Fiscal Period Focus	Q3
Document Period End Date	Jun. 30, 2021
Document Fiscal Year Focus	2021
Entity Registrant Name	MUELLER WATER PRODUCTS, INC.
Entity Central Index Key	0001350593
Current Fiscal Year End Date	--09-30
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Entity Current Reporting Status	Yes
Entity Emerging Growth Company	false
Amendment Flag	false
Entity Small Business	false
Trading Symbol	MWA
Title of 12(b) Security	Common stock, par value $0.01

Cover Page Document

Cover Page Document - shares	9 Months Ended
	Jun. 30, 2021	Jul. 31, 2021
Cover Page [Abstract]
Entity Incorporation, State or Country Code	DE
Document Type	10-Q
Document Type	true
Document Period End Date	Jun. 30, 2021
Document Transition Report	false
Entity File Number	001-32892
Entity Registrant Name	MUELLER WATER PRODUCTS, INC.
Entity Tax Identification Number	20-3547095
Entity Address, Address Line One	1200 Abernathy Road N.E.
Entity Address, Address Line Two	Suite 1200
Entity Address, City or Town	Atlanta
Entity Address, State or Province	GA
Entity Address, Postal Zip Code	30328
City Area Code	(770)
Local Phone Number	206-4200
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		158,560,235
Trading Symbol	MWA
Security Exchange Name	NYSE
Title of 12(b) Security	Common stock, par value $0.01

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Millions	Jun. 30, 2021	Sep. 30, 2020
Assets:
Cash and cash equivalents	$ 228.6	$ 208.9
Receivables, Net, Current	200.7	180.8
Inventories	176.9	162.5
Other current assets	26.2	29
Total current assets	632.4	581.2
Property, plant and equipment, net	275.3	253.8
Goodwill	116	99.8
Identifiable intangible assets	402	408.9
Other noncurrent assets	58.9	51.3
Total assets	1,484.6	1,395
Liabilities and stockholders' equity:
Current portion of long-term debt	1	1.1
Accounts payable	86.6	67.3
Accrued liabilities	101.3	86.6
Total current liabilities	188.9	155
Long-term debt	445.6	446.5
Deferred income taxes	102.1	96.5
Other noncurrent liabilities	64.8	56.3
Total liabilities	$ 801.4	$ 754.3
Common Stock, Shares, Outstanding	158,527,319	158,064,750
Series A common stock, shares authorized	600,000,000
Common stock	$ 1.6	$ 1.6
Additional paid-in capital	1,358.7	1,378
Accumulated deficit	(662.3)	(714.2)
Accumulated other comprehensive income (loss)	(14.8)	(24.7)
Total equity	683.2	640.7
Total liabilities and stockholders' equity	$ 1,484.6	$ 1,395

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2021	Sep. 30, 2020
Statement of Financial Position [Abstract]
Accounts Receivable, Allowance for Credit Loss, Current	$ (3.1)	$ (2.5)

Consolidated Statements Of Oper

Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Net sales	$ 310.5	$ 228.5	$ 815.4	$ 698.8
Cost of sales	205.1	152.8	543.2	464.5
Gross profit	105.4	75.7	272.2	234.3
Operating expenses:
Selling, general and administrative	58.8	47.1	162.2	146.3
Restructuring and other charges	3.9	8.6	6.1	11.9
Total operating expenses	62.7	55.7	168.3	158.2
Operating income	42.7	20	103.9	76.1
Non-operating expense:
Pension costs (benefits) other then service	(0.8)	(0.7)	(2.4)	(2.2)
Interest expense, net	6.8	6.1	19	19.5
Gain (Loss) on Extinguishment of Debt	16.7	0	16.7	0
Walter Energy Accrual	0	0	0	0.2
Net other expense	22.7	5.4	33.3	17.5
Income (loss) before income taxes	20	14.6	70.6	58.6
Income tax expense (benefit)	5.6	3.4	18.6	13.3
Net income (loss)	$ 14.4	$ 11.2	$ 52	$ 45.3
Net income (loss) per basic share:
Earnings Per Share, Basic	$ 0.09	$ 0.07	$ 0.33	$ 0.29
Net income (loss) per diluted share:
Earnings Per Share, Diluted	$ 0.09	$ 0.07	$ 0.33	$ 0.29
Weighted average shares outstanding:
Basic, in shares	158,500	157,800	158,400	157,800
Diluted, in shares	159,300	158,500	159,000	158,600
Dividends declared per share, in dollars per share	$ 0.0550	$ 0.0525	$ 0.1650	$ 0.1575

Consolidated Statement of Compr

Consolidated Statement of Comprehensive Income Statement - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Net income (loss)	$ 14.4	$ 11.2	$ 52	$ 45.3
Other comprehensive income (loss):
Other comprehensive (income) loss, pension, before tax	0.7	0.7	1.9	2.2
Other comprehensive income (loss), pension income tax effects	(0.2)	(0.2)	(0.5)	(0.5)
Foreign currency translation	4.4	(1.7)	8.5	0
Other comprehensive income (loss), net of tax	4.9	(1.2)	9.9	1.7
Comprehensive income (loss), net of tax	$ 19.3	$ 10	$ 61.9	$ 47

Consolidated Statement Of Stock

Consolidated Statement Of Stockholders' Equity - USD ($) $ in Millions	Total	Common stock	Accumulated deficit	Accumulated deficitCumulative Effect, Period of Adoption, Adjustment	Accumulated other comprehensive income (loss)	Noncontrolling Interest [Member]	Additional Paid-in Capital [Member]
Other comprehensive income (loss), net of tax					$ 1.7
Common stock, dividends, per share, declared	$ 0.1575
Balance at Sep. 30, 2019		$ 1.6	$ (786.2)		(36)	$ 2.2	$ 1,410.7
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared							24.9
Stock-based compensation							3.8
Shares retained for employee taxes							0.7
Stock issued under stock compensation plans	$ 0						2.6
Net income (loss)	45.3
Balance at Jun. 30, 2020		1.6	(740.9)		(34.3)	0	1,383.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Proceeds from (Payments to) Noncontrolling Interests						(2.2)
Adjustments to Additional paid in capital, other							(3.2)
Acquisition of joint venture partner's interest	$ 5.2
Stock repurchased under buyback program							(5)
Other comprehensive income (loss), net of tax					(1.2)
Common stock, dividends, per share, declared	$ 0.0525
Balance at Mar. 31, 2020		1.6	(752.1)		(33.1)	0	1,390.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared							8.3
Stock-based compensation							1.1
Shares retained for employee taxes							0
Stock issued under stock compensation plans	$ 0						0.4
Net income (loss)	11.2
Balance at Jun. 30, 2020		1.6	(740.9)		(34.3)	0	1,383.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Proceeds from (Payments to) Noncontrolling Interests						0
Adjustments to Additional paid in capital, other							0
Stock repurchased under buyback program							0
Stockholders' Equity Attributable to Parent	609.7			$ 0
Common stock, value, issued	1.6
Other comprehensive income (loss), net of tax	$ 9.9				9.9
Common stock, dividends, per share, declared	$ 0.1650
Balance at Sep. 30, 2020	$ 640.7	1.6	(714.2)		(24.7)	0	1,378
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared							26.1
Stock-based compensation							6.3
Shares retained for employee taxes							1
Stock issued under stock compensation plans	0						1.5
Net income (loss)	52
Balance at Jun. 30, 2021	683.2	1.6	(662.3)		(14.8)	0	1,358.7
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Proceeds from (Payments to) Noncontrolling Interests						0
Adjustments to Additional paid in capital, other							0
Acquisition of joint venture partner's interest	$ 0
Stock repurchased under buyback program							0
Stockholders' Equity Attributable to Parent				(0.1)
Other comprehensive income (loss), net of tax					4.9
Common stock, dividends, per share, declared	$ 0.0550
Balance at Mar. 31, 2021		1.6	(676.7)		(19.7)	0	1,364.2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared							8.7
Stock-based compensation							2.7
Shares retained for employee taxes							0
Stock issued under stock compensation plans	$ 0						0.5
Net income (loss)	14.4
Balance at Jun. 30, 2021	683.2	$ 1.6	$ (662.3)		$ (14.8)	0	1,358.7
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adjustments to Additional paid in capital, other							0
Noncontrolling interest, decrease from distributions to noncontrolling interest holders						$ 0
Stock repurchased under buyback program							$ 0
Common stock, value, issued	1.6
Stockholders' Equity Attributable to Parent	$ 683.2			$ 0

Consolidated Statements Of Cash

Consolidated Statements Of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Net cash provided by (used in) operating activities
Net income (loss)	$ 52	$ 45.3
Adjustments to reconcile net income (loss) to income (loss) from continuing operations:
Depreciation	23.4	21.7
Amortization	21.2	21.1
Gain (Loss) on Extinguishment of Debt	16.7	0
Stock-based compensation expense	6.3	3.8
Retirement plans	(1.4)	2.2
Deferred income taxes	0.9	1.4
Other noncash income (expense)	(1.2)	(1.6)
Changes in assets and liabilities, net of acquisitions:
Receivables	(18.1)	17.4
Inventories	(19.1)	5
Other current assets and other noncurrent assets	0.3	0.7
Accounts payable	18.1	(25.6)
Walter Energy Accrual	0	(22)
Other current liabilities	11.3	6
Long-term liabilities	3.7	(6.4)
Net cash provided by (used in) operating activities, total	123.3	77.8
Investing activities:
Payments to Acquire Productive Assets	(46.1)	(51.2)
Payments to Acquire Businesses, Net of Cash Acquired	(19.7)	0
Proceeds from sales of assets	0.4	0.3
Net cash provided by (used in) investing activities, total	(65.4)	(50.9)
Financing activities:
Dividends paid	(26.1)	(24.9)
Acquisition of joint venture partner's interest	0	5.2
Repayment of Krausz debt	(462.4)	0
Shares retained for employee taxes	(1)	(0.7)
Proceeds from Issuance of Unsecured Debt	450	0
Common stock issued	1.5	2.6
Proceeds from Other Equity	3.9
Payments of financing costs	(6)	0
Stock repurchased under buyback program	0	(5)
Other	(0.5)	0.6
Net cash provided by (used in) financing activities, total	(40.6)	(32.6)
Effect of currency exchange rate changes on cash	2.4	(0.3)
Net change in cash and cash equivalents	19.7	(6)
Cash and cash equivalents at beginning of period	208.9	176.7
Cash and cash equivalents at end of period	228.6	170.7
Interest Paid, Excluding Capitalized Interest, Operating Activities	25.2	24.3
Income Taxes Paid	12.6	5.9
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction	$ 6.8	$ 5.6

Accumulated Other Comprehensive

Accumulated Other Comprehensive Loss	9 Months Ended
	Jun. 30, 2021
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Comprehensive Income (Loss) Note [Text Block]	Accumulated Other Comprehensive Loss Accumulated other comprehensive loss is presented below. Pension, net of tax Foreign currency translation Total (in millions) Balance at September 30, 2020 $ (32.7) $ 8.0 $ (24.7) Current period other comprehensive income 1.4 8.5 9.9 Balance at June 30, 2021 $ (31.3) $ 16.5 $ (14.8)
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]	Accumulated other comprehensive loss is presented below. Pension, net of tax Foreign currency translation Total (in millions) Balance at September 30, 2020 $ (32.7) $ 8.0 $ (24.7) Current period other comprehensive income 1.4 8.5 9.9 Balance at June 30, 2021 $ (31.3) $ 16.5 $ (14.8)

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Loss (Tabular)	9 Months Ended
	Jun. 30, 2021
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Schedule Of Accumulated Other Comprehensive Loss	Accumulated other comprehensive loss is presented below. Pension, net of tax Foreign currency translation Total (in millions) Balance at September 30, 2020 $ (32.7) $ 8.0 $ (24.7) Current period other comprehensive income 1.4 8.5 9.9 Balance at June 30, 2021 $ (31.3) $ 16.5 $ (14.8)

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Loss (Schedule Of Accumulated Other Comprehensive Loss) $ in Millions	3 Months Ended	9 Months Ended
	Jun. 30, 2021USD ($)	Jun. 30, 2021USD ($)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax		$ (32.7)
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax		8
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (14.8)	(14.8)
Minimum pension liability, net of tax		1.4
Foreign currency translation	4.4	8.5
Other Comprehensive Income (Loss), Net of Tax		9.9
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax	(31.3)	(31.3)
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	16.5	16.5
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (14.8)	$ (14.8)

Organization

Organization	9 Months Ended
	Jun. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization	Organization and Basis of Presentation Mueller Water Products, Inc., a Delaware corporation, together with its consolidated subsidiaries, operates in two business segments: Infrastructure and Technologies. Infrastructure 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 a broad line of pipe connection and repair products, such as clamps and couplings used to repair leaks. Technologies offers metering systems, leak detection, pipe condition assessment and other related smart-enabled products and services. 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, Infrastructure acquired a 49% ownership interest in an industrial valve joint venture for $1.7 million. As a result of substantive control features in the operating agreement, all of the joint venture’s assets, liabilities and results of operations were included in our consolidated financial statements. Infrastructure acquired the remaining 51% ownership interest in the business in October 2019. On June 14, 2021, we acquired all the outstanding capital stock of i2O Water Ltd, a provider of pressure management solutions to more than 100 water companies in 45 countries. i2O Water Ltd is organized under the laws of the United Kingdom. The condensed consolidated balance sheet at June 30, 2021 includes the preliminary acquisition accounting for i20 Water Ltd. The results of i20 Water Ltd’s operations and cash flows for the period subsequent to the acquisition are included in the condensed consolidated statement of operations and condensed consolidated statement of cash flows, respectively, since the acquisition date. Refer to Note 2 for additional disclosures related to the acquisition. During the three months ended March 31, 2021, we aligned the consolidation of the financial statements of Krausz Industries Development Ltd. and subsidiaries (“Krausz”) in the Company’s consolidated financial statements, eliminating the previous inclusion of Krausz financial statements with a one-month reporting lag. In accordance with applicable accounting literature, the elimination of the one-month reporting lag is considered to be a change in accounting principle. We believe this change in accounting principle is preferable as the financial statements of all of our subsidiaries are now reported on the same basis, providing the most current information available. The effect of the elimination of the reporting lag during the nine months ended June 30, 2021 resulted in an increase of $6.0 million to net sales and an increase of $1.4 million to operating income. We concluded that the effect of this change is not material to the balance sheets, statements of operations, statements of cash flows, net income and earnings per share and therefore have not retrospectively applied this change. 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 in recording assets, liabilities, sales and expenses and the disclosure of contingent assets and liabilities. Actual results could differ from those estimates. All significant intercompany balances and transactions have been eliminated. These condensed consolidated financial statements should be read in conjunction with the consolidated financial statements included in our Annual Report on Form 10-K for the year ended September 30, 2020. In our opinion, all normal and recurring adjustments that we consider necessary for a fair financial statement presentation have been made. The condensed consolidated balance sheet at September 30, 2020 was derived from audited financial statements, but it does not include all disclosures required by GAAP. Our business is seasonal as a result of cold weather conditions. Net sales and operating income have historically been lowest in the three month periods ending December 31 and March 31 when the northern United States and all of Canada generally face weather conditions that restrict significant construction activity. In preparing these financial statements in conformity with GAAP, we have considered and, where appropriate, included the effects of the COVID-19 pandemic on our operations. The pandemic continues to provide significant challenges to the U.S. and global economies. 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. Recently Adopted Accounting Guidance During 2016, the Financial Accounting Standards Board (“FASB”) issued standard Accounting Standard Codification (“ASC”) 326 - Current Expected Credit Losses to replace the “incurred loss” impairment approach with an “expected loss” approach, which requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. We have completed historical and forward-looking analyses for receivables and adopted this guidance effective October 1, 2020. Upon adoption, there was no material impact to our financial statements. Recent Accounting Guidance Not Yet Adopted In December 2019, the FASB issued Accounting Standards Update (“ASU”) No. 2019-12, "Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes ” (“ASU 2019-12”). ASU 2019-12 simplifies the accounting for income taxes by clarifying and amending existing guidance related to the recognition of franchise tax, the evaluation of a step up in the tax basis of goodwill, and the effects of enacted changes in tax laws or rates in the effective tax rate computation, among other clarifications. ASU 2019-12 is effective for public business entities for fiscal years beginning after December 15, 2020, including interim periods within that fiscal year, with early adoption permitted. We plan to adopt this standard on October 1, 2021 and do not expect it to have a material impact on our financial statements. In March 2020, the FASB issued ASU No. 2020-04, "Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting" (“ASU 2020-04”). The new guidance provides optional expedients and exceptions for applying GAAP to contracts, hedging relationships and other transactions affected by reference rate reform if certain criteria are met. The amendments apply only to contracts and hedging relationships that reference the London Inter Bank Offered Rate (“LIBOR”) or another reference rate expected to be discontinued due to reference rate reform. ASU 2020-04 is effective from March 12, 2020, but can be adopted prospectively from a date within an interim period subsequent to March 12, 2020. We are currently evaluating our contracts and the optional expedients provided by ASU 2020-04. We plan to adopt this standard on October 1, 2021 and do not expect it to have a material impact on our financial statements. Restructuring In November 2019, we announced the purchase of a new facility in Kimball, Tennessee to support and enhance our investment in our Chattanooga, Tennessee large casting foundry. As a result, we announced subsequent closures of our facilities in Hammond, Indiana and Woodland, Washington. Expenses incurred for these closures were primarily related to personnel and inventory and are included in Strategic reorganization and other charges. In March 2021, we announced the planned closures of our facilities in Aurora, Illinois and Surrey, British Columbia, Canada. Most of the activities from these plants will be transferred to our Kimball, Tennessee facility. We expect to substantially complete these facility closures by the third quarter of our fiscal year 2022 and expect to incur total expenses related to this restructuring of approximately $14.0 million, including termination benefit costs of approximately $4.8 million and other associated costs of $9.2 million. Of the total $14.0 million estimated costs, approximately $3.6 million are expected to be non-cash charges. Expenses incurred during the nine months ended June 30, 2021 were approximately $4.2 million, including approximately $1.8 million of termination benefit costs which are included in Strategic reorganization and other charges and approximately $2.4 million in inventory write-downs which are included in Cost of sales. Activity in accrued restructuring, reported as part of other current liabilities, is presented below. Nine months ended June 30, 2021 2020 (in millions) Beginning balance $ 2.8 $ 1.7 Expenses incurred 2.0 3.1 Amounts paid (2.2) (1.5) Ending balance $ 2.6 $ 3.3

Revenue from Contracts with Cus

Revenue from Contracts with Customers (Notes)	9 Months Ended
	Jun. 30, 2021
Revenue from Contracts with Customers [Abstract]
Revenue from Contract with Customer [Text Block]	Revenue from Contracts with Customers We recognize revenue when control of promised products or services is transferred to our customers, in amounts that reflect the consideration to which we expect to be entitled in exchange for those products or services. We account for a contract when it has approval and commitment from both parties, the rights of the parties are identified, the payment terms are identified, the contract has commercial substance and collectability of consideration is probable. We determine the appropriate revenue recognition for our contracts with customers by analyzing the type, terms and conditions of each contract or arrangement with a customer. Disaggregation of Revenue We disaggregate our revenues from contracts with customers by reportable segment (see Note 10.) and further by geographical region as we believe this best depicts how the nature, amount, timing and uncertainty of our revenue and cash flows are affected by economic factors. Geographical region represents the location of the customer. Contract Asset and Liability Balances The timing of revenue recognition, billings and cash collections results in customer receivables, customer advance payments and billings in excess of revenue recognized. Customer receivables include amounts billed and currently due from customers as well as unbilled amounts. Amounts are billed in accordance with contractual terms and unbilled amounts arise when the timing of billing differs from the timing of revenue recognized. Customer advance payments and billings in excess of revenue are recognized and recorded as deferred revenue, the majority of which is classified as current, based on the timing of when we expect to recognize revenue. We reverse these contract liabilities and recognize revenue when we satisfy the related performance obligations. We include current deferred revenue within Other current liabilities. The table below represents the balances of our customer receivables and deferred revenues. June 30, September 30, 2021 2020 (in millions) Billed receivables $ 199.9 $ 180.3 Unbilled receivables 7.2 5.3 Total customer receivables $ 207.1 $ 185.6 Deferred revenues $ 7.4 $ 5.6 Performance Obligations A performance obligation is a promise in a contract to transfer a distinct good or service to the customer. Performance obligations are supported by customer contracts which provide frameworks for the nature of the distinct products or services. We allocate the transaction price of each contract to the performance obligations on the basis of standalone selling price and recognize revenue when, or as, control of the performance obligation transfers to the customer. Most of our performance obligations are satisfied at a “point in time” for sales of equipment and for provision of one-time services, and we generally recognize such revenue when goods are shipped or when the services are provided. The remainder of our performance obligations are satisfied “over time” for our software hosting and leak detection monitoring services, and we generally recognize such revenue ratably as services are provided over the expected term of the contract. We offer warranties to our customers in the form of assurance-type warranties, which provide assurance that the products provided will function as intended and comply with any agreed-upon specifications. Such warranties generally cannot be purchased separately. We accrue our expected warranty obligations at the time of sale. Costs to Obtain or Fulfill a Contract We incur certain incremental costs to obtain a contract, which primarily relate to sales commissions. Our commissions are paid based on either orders or shipments, and we reserve the right to claw back any commission in the event of product returns or lost collections. Since the expected benefit associated with these incremental costs is one year or less based on the nature of the products sold and services provided, we expense such costs as incurred.

Income Taxes

Income Taxes	9 Months Ended
	Jun. 30, 2021
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Text Block]	Income Taxes The reconciliation between the U.S. federal statutory income tax rate and the effective income tax rate is presented below. Three months ended Nine months ended June 30, June 30, 2021 2020 2021 2020 U.S. federal statutory income tax rate 21.0 % 21.0 % 21.0 % 21.0 % Adjustments to reconcile to the effective tax rate: State income taxes, net of federal benefit 4.2 4.5 4.2 4.5 Excess tax (benefits) related to stock-based compensation — — (0.3) (0.6) Tax credits (1.7) (1.7) (1.7) (2.6) Global Intangible Low-Taxed Income 0.5 (0.2) 0.5 (0.1) Foreign income tax rate differential (0.4) (0.5) (0.4) (0.6) Nondeductible compensation 0.6 1.0 0.6 0.6 Basis difference in foreign investment 1.2 0.3 1.2 — Valuation allowances — (0.3) 0.7 (0.5) Reversal of uncertain tax positions — (2.1) — (0.5) Other 2.6 1.3 0.5 1.5 Effective income tax rate 28.0 % 23.3 % 26.3 % 22.7 %
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	The reconciliation between the U.S. federal statutory income tax rate and the effective income tax rate is presented below. Three months ended Nine months ended June 30, June 30, 2021 2020 2021 2020 U.S. federal statutory income tax rate 21.0 % 21.0 % 21.0 % 21.0 % Adjustments to reconcile to the effective tax rate: State income taxes, net of federal benefit 4.2 4.5 4.2 4.5 Excess tax (benefits) related to stock-based compensation — — (0.3) (0.6) Tax credits (1.7) (1.7) (1.7) (2.6) Global Intangible Low-Taxed Income 0.5 (0.2) 0.5 (0.1) Foreign income tax rate differential (0.4) (0.5) (0.4) (0.6) Nondeductible compensation 0.6 1.0 0.6 0.6 Basis difference in foreign investment 1.2 0.3 1.2 — Valuation allowances — (0.3) 0.7 (0.5) Reversal of uncertain tax positions — (2.1) — (0.5) Other 2.6 1.3 0.5 1.5 Effective income tax rate 28.0 % 23.3 % 26.3 % 22.7 %

Borrowing Arrangements

Borrowing Arrangements	9 Months Ended
	Jun. 30, 2021
Long-term Debt and Lease Obligation [Abstract]
Borrowing Arrangements	Borrowing Arrangements The components of our long-term debt are presented below. June 30, September 30, 2021 2020 (in millions) 4.0% Senior Notes $ 450.0 $ — 5.5% Senior Notes — 450.0 Finance leases 2.1 2.5 452.1 452.5 Less deferred financing costs (5.5) (4.9) Less current portion (1.0) (1.1) Long-term debt $ 445.6 $ 446.5 4.0% Senior Unsecured Notes. On May 28, 2021, we privately issued $450.0 million of 4.0% Senior Unsecured Notes (“Notes”), which mature on June 15, 2029 and bear interest at 4.0%, paid semi-annually on June 15th and December 15th. We capitalized $5.5 million of debt issuance costs, which are being amortized over the term of the Notes using the effective interest method. Proceeds from the Notes, along with cash on hand were used to redeem our previously existing 5.5% Senior Unsecured Notes (“5.5% Notes”). Substantially all of our U.S. subsidiaries guarantee the Notes, which are subordinate to borrowings under our asset-based lending agreement (“ABL Agreement”). Based on quoted market prices, which is a Level 1 measurement, the outstanding Notes had a fair value of $461.3 million as of June 30, 2021. An indenture securing the Notes (“Indenture”) contains customary covenants and events of default, including covenants that limit our ability to incur certain debt and liens. There are no financial maintenance covenants associated with the Indenture. We believe we were in compliance with these covenants at June 30, 2021. We may redeem some or all of the Notes at any time or from time to time prior to June 15, 2024 at certain “make-whole” redemption prices (as set forth in the Indenture) and on or after June 15, 2024 at specified redemption prices (as set forth in the Indenture). Additionally, we may redeem up to 40% of the aggregate principal amount of the Notes at any time or from time to time prior to June 15, 2024 with the net proceeds of specified equity offerings at specified redemption prices (as set forth in the Indenture). Upon a change in control (as defined in the Indenture), we would be required to offer to purchase the Notes at a price equal to 101% of the outstanding principal amount of the Notes. 5.5% Senior Unsecured Notes. On June 12, 2018, we privately issued $450.0 million of 5.5% Notes which were set to mature in 2026 and bore interest at 5.5%, paid semi-annually. We called the 5.5% Notes effective June 17, 2021 and redeemed the 5.5% Notes with proceeds from the issuance of the Notes and cash on hand. As a result, we incurred $16.7 million in loss on extinguishment of debt, comprised of a $12.4 million call premium and a $4.3 million write-off of the remaining deferred debt issuance costs. ABL Agreement . The ABL Agreement consists of a $175.0 million revolving credit facility that includes up to $25.0 million in swing line loans and up to $60.0 million of letters of credit and permits us to increase the size of the credit facility by an additional $150.0 million in certain circumstances subject to adequate borrowing base availability. Borrowings under the ABL Agreement bear interest at a floating rate equal to the LIBOR, plus an applicable margin ranging from 200 to 225 basis points, or a base rate, as defined in the ABL Agreement, plus an applicable margin ranging from 100 to 125 basis points. At June 30, 2021, the applicable rate was LIBOR plus 200 basis points. The ABL Agreement is subject to mandatory prepayments if total outstanding borrowings under the ABL Agreement are greater than the aggregate commitments under the revolving credit facility or if we dispose of overdue accounts receivable in certain circumstances. The borrowing base under the ABL Agreement is equal to the sum of (a) 85% of the value of eligible accounts receivable and (b) the lesser of (i) 70% of the value of eligible inventories or (ii) 85% of the net orderly liquidation value of eligible inventories, less certain reserves. Prepayments may be made at any time with no penalty.

Derivative Financial Instrument

Derivative Financial Instruments (Notes)	9 Months Ended
	Jun. 30, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities Disclosure [Text Block]	Derivative Financial Instruments In connection with the acquisition of Singer Valve in 2017, we loaned U.S. dollar-denominated funds to one of our Canadian subsidiaries. Although this intercompany loan has no direct effect on our consolidated financial statements, it creates exposure to currency risk for the Canadian subsidiary. To reduce this exposure, we entered into a U.S. dollar-Canadian dollar swap contract with the Canadian subsidiary and an offsetting Canadian dollar-U.S. dollar swap with a domestic bank. The currency swap contracts expire in February 2022. We have not designated these swaps as hedges and thus we include the changes in their fair values in earnings to offset the currency gains and losses associated with the intercompany loan. The values of our currency swap contracts were liabilities of $1.6 million and $0.2 million at June 30, 2021 and September 30, 2020, respectively, and are included in Other current liabilities and Other noncurrent liabilities, respectively.

Retirement Plans

Retirement Plans	9 Months Ended
	Jun. 30, 2021
Retirement Benefits [Abstract]
Retirement Plans	Retirement Plans The components of net periodic benefit cost for our pension plans are presented below. Three months ended Nine months ended June 30, June 30, 2021 2020 2021 2020 (in millions) Service cost $ 0.4 $ 0.4 $ 1.2 $ 1.2 Pension costs (benefits) other than service: Interest cost 2.5 2.8 7.5 8.4 Expected return on plan assets (3.9) (4.2) (11.7) (12.6) Amortization of actuarial net loss 0.6 0.7 1.8 2.0 Pension benefits other than service (0.8) (0.7) (2.4) (2.2) Net periodic benefit $ (0.4) $ (0.3) $ (1.2) $ (1.0) The amortization of actuarial losses, net of tax, is recorded as a component of other comprehensive loss.

Stock-based Compensation Plans

Stock-based Compensation Plans	9 Months Ended
	Jun. 30, 2021
Share-based Payment Arrangement, Noncash Expense [Abstract]
Share-based Payment Arrangement [Text Block]	Stock-based Compensation Plans We grant various forms of stock-based compensation, including market-based restricted stock units (“MRSUs”), restricted stock units, stock options and performance-based restricted stock units (“PRSUs”) under our Amended and Restated 2006 Mueller Water Products, Inc. Stock Incentive Plan (the “2006 Stock Plan”), Phantom Plan instruments under our Mueller Water Products, Inc. 2012 Phantom Plan, and Employee stock purchase plan instruments under our 2006 Employee Stock Purchase Plan. Grants during the nine months ended June 30, 2021 are as follows: Units granted Weighted average grant date fair value per instrument Total grant date fair value Quarter ended December 31, 2020 MRSUs 234,199 $ 15.39 $ 3.6 Phantom Plan instruments 180,987 11.86 2.1 Restricted stock units 129,081 11.86 1.5 Non-qualified stock options 423,405 3.05 1.3 PRSUs: 2020 award 60,019 11.86 0.7 2019 award 84,483 11.86 1.0 Employee stock purchase plan instruments 40,286 1.92 0.1 Quarter ended March 31, 2021 MRSUs 4,187 $ 14.26 $ 0.1 Phantom Plan instruments 1,254 11.94 — Restricted stock units 82,565 12.81 1.1 Non-qualified stock options 8,115 3.08 — Employee stock purchase plan instruments 35,325 2.24 0.1 Quarter ended June 30, 2021 Phantom Plan instruments 3,567 $ 14.29 $ 0.1 Restricted stock units 7,127 13.32 0.1 Employee stock purchase plan instruments 32,916 2.52 0.1 $ 11.9 An MRSU award represents a target number of units that may be paid out at the end of a three-year award cycle based on a calculation of our relative total shareholder return (“TSR”) performance as compared with a selected peer group's TSR. Settlements, in our common shares, will range from zero to two times the number of MRSUs granted, depending on our TSR performance relative to that of the peer group. Compensation expense attributable to MRSUs is based on the fair value of the awards on their respective grant dates, as determined using a Monte Carlo model. The assumptions used to determine the grant date fair value are indicated below. January 27, 2021 December 2, 2020 Variables used in determining grant date fair value: Dividend yield 1.84 % 1.77 % Risk-free rate 0.16 % 0.21 % Expected term (in years) 2.67 2.83 The expected dividend yield is based on our estimated annual dividend and our stock price history at the grant date. The risk-free interest rate is based on the U.S. Treasury zero-coupon yield in effect at the grant date with a term equal to the expected term. The expected term represents the average period of time the units are expected to be outstanding. At June 30, 2021, the outstanding Phantom Plan instruments had a fair value of $14.42 per instrument and our liability for Phantom Plan instruments was $2.7 million and is included within Other current liabilities and Other noncurrent liabilities. Stock options generally vest on each anniversary date of the original grant ratably over three years. Compensation expense attributed to stock options is based on the fair value of the awards on their respective grant dates, as determined using a Black-Scholes model. The assumptions used to determine the grant date fair value are indicated below. January 27, 2021 December 2, 2020 Variables used in determining grant date fair value: Dividend yield 2.01 % 2.01 % Risk-free rate 0.66 % 0.66 % Expected term (in years) 6.00 6.00 The expected dividend yield is based on our estimated annual dividend and our stock price history at the grant date. The risk-free interest rate is based on the U.S. Treasury zero-coupon yield in effect at the grant date with a term equal to the expected term. The expected term represents the average period of time the options are expected to be outstanding. A PRSU award consists of a number of units that may be paid out at the end of a three-year award cycle consisting of a series of annual performance periods coinciding with our fiscal years. After we establish the financial performance targets related to PRSUs for a given performance period, typically during the first quarter of that fiscal year, we consider that portion of a PRSU award to be granted. Thus, each award consists of a grant in the year of award and grants in the two following years. Settlements, in our common shares, will range from zero to two times the number of PRSUs granted, depending on our financial performance relative to the targets. We did not issue any shares of common stock during the three months ended June 30, 2021. We issued 103,058 shares of common stock during the nine months ended June 30, 2021 to settle PRSUs during the period. Additionally, we issued 2,324 and 221,873 shares of common stock to settle restricted stock units vested and issued zero and 108,950 shares of common stock to settle stock options exercised during the three and nine months ended June 30, 2021, respectively. Operating income included stock-based compensation expense of $3.4 million and $1.8 million during the three months ended June 30, 2021 and 2020, respectively, and $8.4 million and $5.0 million during the nine months ended June 30, 2021 and 2020, respectively. At June 30, 2021, there was approximately $11.5 million of unrecognized compensation expense related to stock-based compensation arrangements and there were 199,994 PRSUs that have been awarded for the 2021 and 2022 performance periods for which performance goal achievement cannot yet be determined. We excluded 131,178 and 474,423 stock-based compensation instruments from the calculations of diluted earnings per share for the three months ended June 30, 2021 and 2020, respectively, and 566,666 and 274,009 for the nine months ended June 30, 2021 and 2020, respectively, since their inclusion would have been antidilutive.

Supplemental Balance Sheet Info

Supplemental Balance Sheet Information	3 Months Ended
	Jun. 30, 2021
Balance Sheet Related Disclosures [Abstract]
Supplemental Balance Sheet Information	Supplemental Balance Sheet Information Selected supplemental asset information is presented below. June 30, September 30, 2021 2020 (in millions) Inventories, net: Purchased components and raw material $ 102.2 $ 87.3 Work in process 31.2 32.4 Finished goods 43.5 42.8 Total inventories, net $ 176.9 $ 162.5 Other current assets: Prepaid expenses $ 10.7 $ 10.9 Non-trade receivables 7.1 8.5 Workers’ compensation reimbursement receivable 1.1 — Maintenance and repair supplies and tooling 2.7 3.7 Income taxes 0.6 5.5 Other current assets 4.0 0.4 Total other current assets $ 26.2 $ 29.0 Property, plant and equipment, net: Land $ 6.1 $ 6.2 Buildings 81.6 80.4 Machinery and equipment 428.4 406.3 Construction in progress 76.0 57.4 Total property, plant and equipment 592.1 550.3 Accumulated depreciation (316.8) (296.5) Total property, plant and equipment, net $ 275.3 $ 253.8 Other noncurrent assets: Operating lease right-of-use assets $ 24.0 $ 25.6 Maintenance and repair supplies and tooling 19.1 17.5 Workers’ compensation reimbursement receivable 3.2 — Pension assets 4.2 0.9 Note receivable 1.8 1.8 Deferred financing fees 1.4 1.3 Other noncurrent assets 5.2 4.2 Total other noncurrent assets $ 58.9 $ 51.3 Selected supplemental liability information is presented below. June 30, September 30, 2021 2020 (in millions) Other current liabilities: Compensation and benefits $ 38.9 $ 32.8 Customer rebates 16.0 9.6 Warranty accrual 3.1 7.2 Deferred revenues 7.4 5.6 Refund liability 5.5 4.3 Taxes other than income taxes 4.7 3.9 Operating lease liabilities 3.8 4.0 Workers’ compensation accrual 3.6 2.7 CARES Act payroll tax liabilities 3.6 — Restructuring liabilities 2.6 2.8 Environmental liabilities 1.2 1.2 Interest payable 1.7 7.3 Income taxes payable — 0.2 Other 9.2 5.0 Total other current liabilities $ 101.3 $ 86.6 Other noncurrent liabilities: Operating lease liabilities $ 21.8 $ 23.3 Warranty accrual 8.0 7.2 Transition tax liability 4.7 5.2 Uncertain tax position liability 5.0 4.5 NMTC liability 3.9 — Workers’ compensation accrual 8.5 3.8 Asset retirement obligation 3.6 3.5 CARES Act payroll tax liabilities 3.6 3.3 Deferred development grant 2.5 2.5 Other 3.2 3.0 Total other noncurrent liabilities $ 64.8 $ 56.3 Goodwill Goodwill is tested for impairment at the reporting unit level (operating segment or one level below an operating segment) on an annual basis each September 1 st and between annual tests if an event occurs or circumstances change that would more likely than not reduce the fair value of a reporting unit below its carrying value. The following table summarizes information concerning our goodwill balance for the nine months ended June 30, 2021, in millions. Balance at September 30, 2020 $ 99.8 Acquisition of i2O Water Ltd 13.6 Effects of changes in foreign currency exchange rates 2.6 Balance at June 30, 2021 $ 116.0

Segment Information

Segment Information	9 Months Ended
	Jun. 30, 2021
Segment Reporting, Measurement Disclosures [Abstract]
Segment Reporting Disclosure [Text Block]	Segment Information Summarized financial information for our segments is presented below. Net sales and operating income associated with certain products have been reclassified as Technologies segment items to conform to the current period presentation. Three months ended Nine months ended June 30, June 30, 2021 2020 2021 2020 (in millions) Net sales, excluding intercompany: Infrastructure $ 287.3 $ 209.4 $ 750.1 $ 641.6 Technologies 23.2 19.1 65.3 57.2 $ 310.5 $ 228.5 $ 815.4 $ 698.8 Operating income (loss): Infrastructure $ 64.0 $ 43.6 $ 158.2 $ 129.4 Technologies (2.7) (3.6) (8.8) (10.0) Corporate (18.6) (20.0) (45.5) (43.3) $ 42.7 $ 20.0 $ 103.9 $ 76.1 Depreciation and amortization: Infrastructure $ 13.0 12.2 $ 38.2 $ 36.3 Technologies 2.1 2.3 6.2 6.4 Corporate 0.1 — 0.2 0.1 $ 15.2 $ 14.5 $ 44.6 $ 42.8 Strategic reorganization and other (credits) charges: Infrastructure $ 0.2 $ — $ (0.4) $ 0.4 Technologies — — — — Corporate 3.7 8.6 6.5 11.5 $ 3.9 $ 8.6 $ 6.1 $ 11.9 Capital expenditures: Infrastructure $ 13.8 $ 13.4 $ 43.3 $ 49.1 Technologies 1.2 0.5 2.7 1.8 Corporate — — 0.1 0.3 $ 15.0 $ 13.9 $ 46.1 $ 51.2 Infrastructure disaggregated net revenues: Central $ 71.1 $ 57.4 $ 192.1 $ 163.6 Northeast 52.9 38.7 141.8 135.3 Southeast 57.6 35.6 144.1 119.8 West 71.2 50.7 188.1 154.3 United States 252.9 182.4 666.2 573.0 Canada 27.9 20.7 60.4 47.3 Other international locations 6.5 6.3 23.5 21.3 $ 287.3 $ 209.4 $ 750.1 $ 641.6 Technologies disaggregated net revenues: Central $ 5.7 $ 5.1 $ 17.3 $ 13.6 Northeast 3.0 4.1 10.0 15.0 Southeast 8.5 5.2 22.3 16.6 West 4.8 3.7 12.7 8.9 United States 22.0 18.1 62.2 54.1 Canada 0.5 0.3 0.9 1.2 Other international locations 0.7 0.7 2.3 1.9 $ 23.2 $ 19.1 $ 65.3 $ 57.2

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Jun. 30, 2021
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. 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 financial statements cannot be predicted with certainty as any such effect depends on the amount and timing of the resolution of such matters, unless otherwise indicated below. Other than the litigation described below, we do not believe that any of our outstanding litigation would 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 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 International plc, now Johnson Controls International plc (“JCI”), sold our businesses to a previous owner in August 1999, JCI 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. JCI’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, JCI has engaged in multiple corporate restructurings, split-offs and divestitures. While none of these transactions directly affects the indemnification obligations of the JCI indemnitors under the 1999 acquisition agreement, the result of such transactions is that the assets of, and control over, such JCI indemnitors has changed. Should any of these JCI indemnitors become financially unable or fail to comply with the terms of the indemnity, we may be responsible for such obligations or liabilities. On July 13, 2010, Rohcan Investments Limited, the former owner of a 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. U.S. Pipe, which was sold in 2012, has been identified as a “potentially responsible party” (“PRP”) under the Comprehensive Environmental Response, Compensation and Liability Act in connection with a former manufacturing facility operated by U.S. Pipe that was in the vicinity of a proposed Superfund site located in North Birmingham, Alabama. Under the terms of the acquisition agreement relating to our sale of U.S. Pipe, we agreed to indemnify the purchaser for certain environmental liabilities, including those arising out of the former manufacturing site in North Birmingham. Accordingly, the purchaser tendered the matter to us for indemnification, which we accepted. Ultimate liability for the site will depend on many factors that have not yet been determined, including the determination of the Environmental Protection Agency’s remediation costs, the number and financial viability of the other PRPs (there are four other PRPs currently) and the determination of the final allocation of the costs among the PRPs. Since the amounts of such costs cannot be reasonably estimated at this time, no amounts have been accrued for this matter at June 30, 2021. Walter Energy . On November 18, 2019, we paid approximately $22.2 million to the Internal Revenue Service in final settlement of a tax dispute related to our former parent company, Walter Energy, Inc. Mass Shooting Event at our Mueller Co. Facility in Albertville, Alabama. On June 15, 2021, we experienced a mass shooting event at our Mueller Co. facility in Albertville, Alabama, in which two employees were killed and two employees were injured. Various workers’ compensation claims arising from the event have been made to date, and we anticipate that additional claims may be made, and that liability under such claims, if any, is not expected to have a material adverse effect on our results of operations or cash flows. However, the possibility of other legal proceedings, and any related effects, arising from this event cannot be predicted with certainty. The COVID-19 Pandemic. The pandemic has caused, and is likely to continue to cause, severe economic, market and other disruptions to the U.S. and global economies. We have taken action and continue to counter such disruption and work to protect the safety of our production workers as essential workers at our various manufacturing plants, distribution centers and research and development centers. We are uncertain of the potential magnitude or duration of the business and economic impacts from the unprecedented public health effort to contain and combat the spread of COVID-19, and while the extent to which the pandemic affects our results will depend on future developments, including COVID-19 variants, the outbreak could result in material effects to our future financial position, results of operations, cash flows and liquidity. 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 divestitures of the subsidiaries, U.S. Pipe and Anvil, 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. We monitor and analyze our warranty experience and costs periodically and revise our accruals as necessary. Critical factors in our analyses include warranty terms, specific claim situations, general incurred and projected failure rates, the nature of product failures, product and labor costs, and general business conditions. We are party to a number of lawsuits arising in the ordinary course of business, including product liability cases for products manufactured by us or third parties. 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 financial position, results of operations, cash flows or liquidity.

Subsequent Events

Subsequent Events	9 Months Ended
	Jun. 30, 2021
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events On July 29, 2021, our Board of Directors declared a dividend of $0.0550 per share on our common stock, payable on or about August 20, 2021 to stockholders of record at the close of business on August 10, 2021

Business Combinations and Asset

Business Combinations and Asset Acquisitions	9 Months Ended
	Jun. 30, 2021
Business Combination and Asset Acquisition [Abstract]
Business Combination Disclosure [Text Block]	Business Combination Acquisition of i20 Water Ltd On June 14, 2021, we acquired all the outstanding capital stock of i20 Water Ltd for $19.7 million, net of cash acquired. The purchase agreement provides for customary final adjustments, including a net working capital adjustment, which we expect to occur in calendar 2021. We have recognized the assets acquired and liabilities assumed at their estimated acquisition date fair values, with the excess of the consideration paid over the estimated fair values of the identifiable net assets acquired recorded as goodwill. The accounting for the business combination is based on currently available information and is considered preliminary. We have retained a third-party valuation specialist to assist in our estimate of the fair value of acquired intangible assets. We have not yet received a final valuation report for acquired intangible assets and we are also still gathering information about income taxes, deferred taxes and current assets and liabilities. The final accounting for the business combination may differ materially from that presented in these unaudited consolidated statements. The following is a summary of the estimated fair values of the net assets acquired (in millions): Assets, net of cash: Receivables $ 0.5 Inventories 0.6 Other current assets 0.9 Tradename 2.0 Customer relationships 2.1 Non-compete agreements 0.4 Developed technology 5.9 Goodwill 13.6 Liabilities: Accounts payable (0.8) Other current liabilities (2.9) Deferred income taxes (2.6) Fair value of net assets acquired, net of cash $ 19.7 The preliminary estimated goodwill above is attributable to the strategic opportunities and synergies that we expect to arise from the acquisition of i20 Water Ltd and the workforce of the acquired business. The goodwill is nondeductible for income tax purposes.

Organization Restructuring Roll

Organization Restructuring Rollforward (Tables)	9 Months Ended
	Jun. 30, 2021
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Costs [Table Text Block]	Activity in accrued restructuring, reported as part of other current liabilities, is presented below. Nine months ended June 30, 2021 2020 (in millions) Beginning balance $ 2.8 $ 1.7 Expenses incurred 2.0 3.1 Amounts paid (2.2) (1.5) Ending balance $ 2.6 $ 3.3

Revenue from Contracts with C_2

Revenue from Contracts with Customers (Tables)	9 Months Ended
	Jun. 30, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Schedule of Accounts, Notes, Loans and Financing Receivable	The table below represents the balances of our customer receivables and deferred revenues. June 30, September 30, 2021 2020 (in millions) Billed receivables $ 199.9 $ 180.3 Unbilled receivables 7.2 5.3 Total customer receivables $ 207.1 $ 185.6 Deferred revenues $ 7.4 $ 5.6

Income Taxes Rate Reconciliatio

Income Taxes Rate Reconciliation (Tables)	9 Months Ended
	Jun. 30, 2021
Income Tax Disclosure [Abstract]
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	The reconciliation between the U.S. federal statutory income tax rate and the effective income tax rate is presented below. Three months ended Nine months ended June 30, June 30, 2021 2020 2021 2020 U.S. federal statutory income tax rate 21.0 % 21.0 % 21.0 % 21.0 % Adjustments to reconcile to the effective tax rate: State income taxes, net of federal benefit 4.2 4.5 4.2 4.5 Excess tax (benefits) related to stock-based compensation — — (0.3) (0.6) Tax credits (1.7) (1.7) (1.7) (2.6) Global Intangible Low-Taxed Income 0.5 (0.2) 0.5 (0.1) Foreign income tax rate differential (0.4) (0.5) (0.4) (0.6) Nondeductible compensation 0.6 1.0 0.6 0.6 Basis difference in foreign investment 1.2 0.3 1.2 — Valuation allowances — (0.3) 0.7 (0.5) Reversal of uncertain tax positions — (2.1) — (0.5) Other 2.6 1.3 0.5 1.5 Effective income tax rate 28.0 % 23.3 % 26.3 % 22.7 %

Borrowing Arrangements (Tables)

Borrowing Arrangements (Tables)	9 Months Ended
	Jun. 30, 2021
Long-term Debt and Lease Obligation [Abstract]
Components of Long-Term Debt	The components of our long-term debt are presented below. June 30, September 30, 2021 2020 (in millions) 4.0% Senior Notes $ 450.0 $ — 5.5% Senior Notes — 450.0 Finance leases 2.1 2.5 452.1 452.5 Less deferred financing costs (5.5) (4.9) Less current portion (1.0) (1.1) Long-term debt $ 445.6 $ 446.5

Retirement Plans (Tables)

Retirement Plans (Tables)	9 Months Ended
	Jun. 30, 2021
Retirement Benefits [Abstract]
Schedule of Net Periodic Benefit Cost	The components of net periodic benefit cost for our pension plans are presented below. Three months ended Nine months ended June 30, June 30, 2021 2020 2021 2020 (in millions) Service cost $ 0.4 $ 0.4 $ 1.2 $ 1.2 Pension costs (benefits) other than service: Interest cost 2.5 2.8 7.5 8.4 Expected return on plan assets (3.9) (4.2) (11.7) (12.6) Amortization of actuarial net loss 0.6 0.7 1.8 2.0 Pension benefits other than service (0.8) (0.7) (2.4) (2.2) Net periodic benefit $ (0.4) $ (0.3) $ (1.2) $ (1.0)

Stock-based Compensation Plans

Stock-based Compensation Plans (Tables)	3 Months Ended
	Jun. 30, 2021
Share-based Payment Arrangement, Noncash Expense [Abstract]
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions	Stock options generally vest on each anniversary date of the original grant ratably over three years. Compensation expense attributed to stock options is based on the fair value of the awards on their respective grant dates, as determined using a Black-Scholes model. The assumptions used to determine the grant date fair value are indicated below. January 27, 2021 December 2, 2020 Variables used in determining grant date fair value: Dividend yield 2.01 % 2.01 % Risk-free rate 0.66 % 0.66 % Expected term (in years) 6.00 6.00

Supplemental Balance Sheet In_2

Supplemental Balance Sheet Information (Tables)	3 Months Ended
	Jun. 30, 2021
Balance Sheet Related Disclosures [Abstract]
Schedule Of Selected Supplemental Balance Sheet Information [Table Text Block]	Selected supplemental asset information is presented below. June 30, September 30, 2021 2020 (in millions) Inventories, net: Purchased components and raw material $ 102.2 $ 87.3 Work in process 31.2 32.4 Finished goods 43.5 42.8 Total inventories, net $ 176.9 $ 162.5 Other current assets: Prepaid expenses $ 10.7 $ 10.9 Non-trade receivables 7.1 8.5 Workers’ compensation reimbursement receivable 1.1 — Maintenance and repair supplies and tooling 2.7 3.7 Income taxes 0.6 5.5 Other current assets 4.0 0.4 Total other current assets $ 26.2 $ 29.0 Property, plant and equipment, net: Land $ 6.1 $ 6.2 Buildings 81.6 80.4 Machinery and equipment 428.4 406.3 Construction in progress 76.0 57.4 Total property, plant and equipment 592.1 550.3 Accumulated depreciation (316.8) (296.5) Total property, plant and equipment, net $ 275.3 $ 253.8 Other noncurrent assets: Operating lease right-of-use assets $ 24.0 $ 25.6 Maintenance and repair supplies and tooling 19.1 17.5 Workers’ compensation reimbursement receivable 3.2 — Pension assets 4.2 0.9 Note receivable 1.8 1.8 Deferred financing fees 1.4 1.3 Other noncurrent assets 5.2 4.2 Total other noncurrent assets $ 58.9 $ 51.3
Schedule of Accrued Liabilities	Selected supplemental liability information is presented below. June 30, September 30, 2021 2020 (in millions) Other current liabilities: Compensation and benefits $ 38.9 $ 32.8 Customer rebates 16.0 9.6 Warranty accrual 3.1 7.2 Deferred revenues 7.4 5.6 Refund liability 5.5 4.3 Taxes other than income taxes 4.7 3.9 Operating lease liabilities 3.8 4.0 Workers’ compensation accrual 3.6 2.7 CARES Act payroll tax liabilities 3.6 — Restructuring liabilities 2.6 2.8 Environmental liabilities 1.2 1.2 Interest payable 1.7 7.3 Income taxes payable — 0.2 Other 9.2 5.0 Total other current liabilities $ 101.3 $ 86.6 Other noncurrent liabilities: Operating lease liabilities $ 21.8 $ 23.3 Warranty accrual 8.0 7.2 Transition tax liability 4.7 5.2 Uncertain tax position liability 5.0 4.5 NMTC liability 3.9 — Workers’ compensation accrual 8.5 3.8 Asset retirement obligation 3.6 3.5 CARES Act payroll tax liabilities 3.6 3.3 Deferred development grant 2.5 2.5 Other 3.2 3.0 Total other noncurrent liabilities $ 64.8 $ 56.3
Schedule of Goodwill	The following table summarizes information concerning our goodwill balance for the nine months ended June 30, 2021, in millions. Balance at September 30, 2020 $ 99.8 Acquisition of i2O Water Ltd 13.6 Effects of changes in foreign currency exchange rates 2.6 Balance at June 30, 2021 $ 116.0

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
	Jun. 30, 2021
Segment Reporting, Measurement Disclosures [Abstract]
Schedule Of Selected Supplemental Balance Sheet Information	Summarized financial information for our segments is presented below. Net sales and operating income associated with certain products have been reclassified as Technologies segment items to conform to the current period presentation. Three months ended Nine months ended June 30, June 30, 2021 2020 2021 2020 (in millions) Net sales, excluding intercompany: Infrastructure $ 287.3 $ 209.4 $ 750.1 $ 641.6 Technologies 23.2 19.1 65.3 57.2 $ 310.5 $ 228.5 $ 815.4 $ 698.8 Operating income (loss): Infrastructure $ 64.0 $ 43.6 $ 158.2 $ 129.4 Technologies (2.7) (3.6) (8.8) (10.0) Corporate (18.6) (20.0) (45.5) (43.3) $ 42.7 $ 20.0 $ 103.9 $ 76.1 Depreciation and amortization: Infrastructure $ 13.0 12.2 $ 38.2 $ 36.3 Technologies 2.1 2.3 6.2 6.4 Corporate 0.1 — 0.2 0.1 $ 15.2 $ 14.5 $ 44.6 $ 42.8 Strategic reorganization and other (credits) charges: Infrastructure $ 0.2 $ — $ (0.4) $ 0.4 Technologies — — — — Corporate 3.7 8.6 6.5 11.5 $ 3.9 $ 8.6 $ 6.1 $ 11.9 Capital expenditures: Infrastructure $ 13.8 $ 13.4 $ 43.3 $ 49.1 Technologies 1.2 0.5 2.7 1.8 Corporate — — 0.1 0.3 $ 15.0 $ 13.9 $ 46.1 $ 51.2 Infrastructure disaggregated net revenues: Central $ 71.1 $ 57.4 $ 192.1 $ 163.6 Northeast 52.9 38.7 141.8 135.3 Southeast 57.6 35.6 144.1 119.8 West 71.2 50.7 188.1 154.3 United States 252.9 182.4 666.2 573.0 Canada 27.9 20.7 60.4 47.3 Other international locations 6.5 6.3 23.5 21.3 $ 287.3 $ 209.4 $ 750.1 $ 641.6 Technologies disaggregated net revenues: Central $ 5.7 $ 5.1 $ 17.3 $ 13.6 Northeast 3.0 4.1 10.0 15.0 Southeast 8.5 5.2 22.3 16.6 West 4.8 3.7 12.7 8.9 United States 22.0 18.1 62.2 54.1 Canada 0.5 0.3 0.9 1.2 Other international locations 0.7 0.7 2.3 1.9 $ 23.2 $ 19.1 $ 65.3 $ 57.2

Business Combinations and Ass_2

Business Combinations and Asset Acquisitions (Tables)	9 Months Ended
	Jun. 30, 2021
Business Combination and Asset Acquisition [Abstract]
Schedule of Business Acquisitions, by Acquisition [Table Text Block]	The following is a summary of the estimated fair values of the net assets acquired (in millions): Assets, net of cash: Receivables $ 0.5 Inventories 0.6 Other current assets 0.9 Tradename 2.0 Customer relationships 2.1 Non-compete agreements 0.4 Developed technology 5.9 Goodwill 13.6 Liabilities: Accounts payable (0.8) Other current liabilities (2.9) Deferred income taxes (2.6) Fair value of net assets acquired, net of cash $ 19.7

Organization (Details)

Organization (Details) - USD ($) $ in Millions	Jul. 31, 2014	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Dec. 31, 2015	Jun. 30, 2021	Jun. 30, 2020	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting Information [Line Items]
Restructuring		$ 2.6		$ 3.3		$ 2.6	$ 3.3	$ 2.8	$ 1.7
Restructuring and other charges		3.9		8.6		6.1	11.9
Payments						2.2	1.5
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage	49.00%
Pension costs (benefits) other then service		$ (0.8)		$ (0.7)		$ (2.4)	$ (2.2)
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		21.00%		21.00%		21.00%	21.00%
Payments to acquire interest in joint venture					$ 1.7
Proceeds from Other Equity, Gross Amount		$ 4.8				$ 4.8
Intercompany Loan related to NMTC		12.2				12.2
Investment Fund Contribution for NMTC		16.5				16.5
Sub-CDE loan from NMTC		16.2				16.2
Proceeds from Other Equity			$ 3.9			3.9
Restructuring Costs		4.2				14
Severance Costs		1.8				4.8
Other Restructuring Costs						9.2
Non-cash restructuring charges						3.6
Inventory write-down		2.4
Mueller Co. [Member]
Segment Reporting Information [Line Items]
Restructuring and other charges		$ 0.2		$ 0		$ (0.4)	$ 0.4

Organization Restructuring (Det

Organization Restructuring (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Sep. 30, 2020	Sep. 30, 2019
Restructuring Cost and Reserve [Line Items]
Restructuring	$ 2.6	$ 3.3	$ 2.6	$ 3.3	$ 2.8	$ 1.7
Restructuring and other charges	$ 3.9	$ 8.6	6.1	11.9
Payments			(2.2)	(1.5)
Mueller One Project [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges			$ 2	$ 3.1

Revenue from Contracts with C_3

Revenue from Contracts with Customers (Details) - USD ($) $ in Millions	9 Months Ended
	Jun. 30, 2021	Sep. 30, 2020
Revenue from External Customer [Line Items]
Revenue from Contract with Customer [Text Block]	Revenue from Contracts with Customers We recognize revenue when control of promised products or services is transferred to our customers, in amounts that reflect the consideration to which we expect to be entitled in exchange for those products or services. We account for a contract when it has approval and commitment from both parties, the rights of the parties are identified, the payment terms are identified, the contract has commercial substance and collectability of consideration is probable. We determine the appropriate revenue recognition for our contracts with customers by analyzing the type, terms and conditions of each contract or arrangement with a customer. Disaggregation of Revenue We disaggregate our revenues from contracts with customers by reportable segment (see Note 10.) and further by geographical region as we believe this best depicts how the nature, amount, timing and uncertainty of our revenue and cash flows are affected by economic factors. Geographical region represents the location of the customer. Contract Asset and Liability Balances The timing of revenue recognition, billings and cash collections results in customer receivables, customer advance payments and billings in excess of revenue recognized. Customer receivables include amounts billed and currently due from customers as well as unbilled amounts. Amounts are billed in accordance with contractual terms and unbilled amounts arise when the timing of billing differs from the timing of revenue recognized. Customer advance payments and billings in excess of revenue are recognized and recorded as deferred revenue, the majority of which is classified as current, based on the timing of when we expect to recognize revenue. We reverse these contract liabilities and recognize revenue when we satisfy the related performance obligations. We include current deferred revenue within Other current liabilities. The table below represents the balances of our customer receivables and deferred revenues. June 30, September 30, 2021 2020 (in millions) Billed receivables $ 199.9 $ 180.3 Unbilled receivables 7.2 5.3 Total customer receivables $ 207.1 $ 185.6 Deferred revenues $ 7.4 $ 5.6 Performance Obligations A performance obligation is a promise in a contract to transfer a distinct good or service to the customer. Performance obligations are supported by customer contracts which provide frameworks for the nature of the distinct products or services. We allocate the transaction price of each contract to the performance obligations on the basis of standalone selling price and recognize revenue when, or as, control of the performance obligation transfers to the customer. Most of our performance obligations are satisfied at a “point in time” for sales of equipment and for provision of one-time services, and we generally recognize such revenue when goods are shipped or when the services are provided. The remainder of our performance obligations are satisfied “over time” for our software hosting and leak detection monitoring services, and we generally recognize such revenue ratably as services are provided over the expected term of the contract. We offer warranties to our customers in the form of assurance-type warranties, which provide assurance that the products provided will function as intended and comply with any agreed-upon specifications. Such warranties generally cannot be purchased separately. We accrue our expected warranty obligations at the time of sale. Costs to Obtain or Fulfill a Contract We incur certain incremental costs to obtain a contract, which primarily relate to sales commissions. Our commissions are paid based on either orders or shipments, and we reserve the right to claw back any commission in the event of product returns or lost collections. Since the expected benefit associated with these incremental costs is one year or less based on the nature of the products sold and services provided, we expense such costs as incurred.
Billed Contracts Receivable	$ 199.9	$ 180.3
Deferred Revenue	7.4	5.6
Unbilled receivables	7.2	5.3
Total customer receivables	$ 207.1	$ 185.6

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Sep. 30, 2020
Income Tax Disclosure [Abstract]
Unrecognized Tax Benefits	$ 5		$ 5		$ 4.5
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	21.00%	21.00%	21.00%
State income taxes, net of federal benefit	4.20%	4.50%	4.20%	4.50%
Tax benefits from stock compensation	0.00%	0.00%	(0.30%)	(0.60%)
Tax credits	(1.70%)	(1.70%)	(1.70%)	(2.60%)
Other	2.60%	1.30%	0.50%	1.50%

Income Taxes Income Tax Rate Re

Income Taxes Income Tax Rate Reconciliation (Details)	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	21.00%	21.00%	21.00%
Adjustments to reconcile to the effective tax rate:
State income taxes, net of federal benefit	4.20%	4.50%	4.20%	4.50%
Valuation allowance adjustment related to stock compensation	0.00%	(0.30%)	0.70%	(0.50%)
Tax benefits from stock compensation	0.00%	0.00%	(0.30%)	(0.60%)
Tax credits	(1.70%)	(1.70%)	(1.70%)	(2.60%)
Effective Income Tax Rate Reconciliation, GILTI, percent	0.50%	(0.20%)	0.50%	(0.10%)
Other	2.60%	1.30%	0.50%	1.50%
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent	(0.40%)	(0.50%)	(0.40%)	(0.60%)
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Payment Arrangement, Percent	0.60%	1.00%	0.60%	0.60%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Payment Arrangement, Percent	0.60%	1.00%	0.60%	0.60%
Effective Income Tax Rate Reconciliation, Basis Difference in Foreign Investments	1.20%	0.30%	1.20%	0.00%
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent	(0.40%)	(0.50%)	(0.40%)	(0.60%)
Effective Income Tax Rate Reconciliation, Fin 48 Statute Release	0.00%	(2.10%)	0.00%	(0.50%)

Borrowing Arrangements (Narrati

Borrowing Arrangements (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Sep. 30, 2020	Sep. 30, 2019
Outstanding letter of credit accrued fees and expenses	$ 1.7		$ 1.7
Cash and cash equivalents	228.6	$ 170.7	228.6	$ 170.7	$ 208.9	$ 176.7
Future maturities of outstanding borrowings
Outstanding letters of credit	15		15
Gain (Loss) on Extinguishment of Debt	16.7	$ 0	16.7	$ 0
Payment for Debt Extinguishment or Debt Prepayment Cost	12.4
Write off of Deferred Debt Issuance Cost	4.3
Domestic Line of Credit [Member]
Revolving credit facility amount	$ (175)		$ (175)
Line of Credit Facility, Interest Rate at Period End	200.00%		200.00%
Excess availability reduced by outstanding borrowings, outstanding letters of credit and accrued fees and expenses	$ 145.1		$ 145.1
Future maturities of outstanding borrowings
Line of Credit Facility, Maximum Borrowing Capacity	175		175
Potential increase size of the credit facility by an additional amount			150
Aggregate commitments availability			$ 17.5
Aggregate commitments availability, percentage			10.00%
Line of Credit Facility, Remaining Borrowing Capacity	145.1		$ 145.1
Swing Line Loans [Member]
Revolving credit facility amount	(25)		(25)
Future maturities of outstanding borrowings
Line of Credit Facility, Maximum Borrowing Capacity	25		25
Letters Of Credit Outstanding [Member]
Revolving credit facility amount	(60)		(60)
Future maturities of outstanding borrowings
Line of Credit Facility, Maximum Borrowing Capacity	$ 60		$ 60
4.0% Senior Notes [Member]
Debt Instrument, Interest Rate, Effective Percentage	4.00%		4.00%
Future maturities of outstanding borrowings
Payments of debt issuance costs	$ 5.5
Financial Liabilities Fair Value Disclosure	$ 461.3		$ 461.3
5.5% Notes
Debt Instrument, Interest Rate, Effective Percentage	5.50%		5.50%
Minimum [Member] | Domestic Line of Credit [Member]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage			37.50%
London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member] | Long-term Debt [Member]
Debt Instrument, Basis Spread on Variable Rate			100.00%
London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member] | Domestic Line of Credit [Member]
Debt Instrument, Basis Spread on Variable Rate			200.00%
London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member] | Long-term Debt [Member]
Debt Instrument, Basis Spread on Variable Rate			125.00%
London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member] | Domestic Line of Credit [Member]
Debt Instrument, Basis Spread on Variable Rate			225.00%

Borrowing Arrangements (Compone

Borrowing Arrangements (Components Of Long-Term Debt) (Details) - USD ($) $ in Millions	Jun. 30, 2021	May 28, 2021	Sep. 30, 2020	Jun. 12, 2018
Debt instrument	$ 452.1		$ 452.5
Deferred financing costs	(5.5)		(4.9)
Current portion of long-term debt	(1)		(1.1)
Long-term debt	445.6		446.5
Other [Member]
Debt instrument	2.1		2.5
4.0% Senior Notes [Member]
5.5% Senior Notes		$ 450
4.0% Senior Notes [Member] | Senior Notes
5.5% Senior Notes	450		0
5.5% Notes
5.5% Senior Notes				$ 450
5.5% Notes | Senior Notes
5.5% Senior Notes	$ 0		$ 450

Derivative Financial Instrume_2

Derivative Financial Instruments (Details) - Foreign Exchange Contract [Member] - USD ($) $ in Millions	Jun. 30, 2021	Sep. 30, 2020
Derivative [Line Items]
Other noncurrent liabilities		$ 0.2
Derivative Liability, Current	$ 1.6
Derivative Liability, Current	$ 1.6

Retirement Plans (Narrative) (D

Retirement Plans (Narrative) (Details) $ in Millions	9 Months Ended
	Jun. 30, 2021USD ($)
Decrease in accumulated other comprehensive loss net of tax	$ 1.4

Retirement Plans (Net Periodic

Retirement Plans (Net Periodic Benefit Cost) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Defined Benefit Plan, Service Cost	$ 0.4	$ 0.4	$ 1.2	$ 1.2
Defined Benefit Plan, Interest Cost	2.5	2.8	7.5	8.4
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(3.9)	(4.2)	(11.7)	(12.6)
Amortization of actuarial net loss	0.6	0.7	1.8	2
Defined Benefit Plan, Net Periodic Benefit Cost other than Service Cost	(0.8)	(0.7)	(2.4)	(2.2)
Net periodic benefit cost	$ (0.4)	$ (0.3)	$ (1.2)	$ (1)

Stock-based Compensation Plan_2

Stock-based Compensation Plans (Narrative) (Details) $ / shares in Units, $ in Millions	Jan. 27, 2021	Dec. 02, 2020	Jun. 30, 2021USD ($)$ / sharesshares	Mar. 31, 2021$ / sharesshares	Dec. 31, 2020$ / sharesshares	Jun. 30, 2020USD ($)shares	Jun. 30, 2021USD ($)$ / sharesshares	Jun. 30, 2020USD ($)shares
Share-based Payment Arrangement, Expense | $			$ 3.4			$ 1.8	$ 8.4	$ 5
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount | $			$ 11.5				$ 11.5
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount			131,178			474,423	566,666	274,009
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares			0				108,950
Phantom Share Units (PSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instrument Other than Option, Nonvested, Intrinsic Value | $ / shares			$ 14.42				$ 14.42
Share-based compensation liability | $			$ 2.7				$ 2.7
Granted, shares			3,567	1,254	180,987
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value | $ / shares			$ 14.29	$ 11.94	$ 11.86
Granted, shares			3,567	1,254	180,987
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period							103,058
Share-based compensation, units awarded but not yet granted			199,994				199,994
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period			2,324				221,873
Granted, shares			7,127	82,565	129,081
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value | $ / shares			$ 13.32	$ 12.81	$ 11.86
Granted, shares			7,127	82,565	129,081
Market Based Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate	1.84%	1.77%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate	0.16%	0.21%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term	2 years 8 months 1 day	2 years 9 months 29 days
Granted, shares				4,187	234,199
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate	1.84%	1.77%
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value | $ / shares				$ 14.26	$ 15.39
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate	0.16%	0.21%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term	2 years 8 months 1 day	2 years 9 months 29 days
Granted, shares				4,187	234,199
Equity Option
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate			2.01%	2.01%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate			0.66%	0.66%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term			6 years	6 years
Granted, shares				8,115	423,405
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate			2.01%	2.01%
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value | $ / shares				$ 3.08	$ 3.05
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate			0.66%	0.66%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term			6 years	6 years
Granted, shares				8,115	423,405
Minimum [Member] | Performance Shares [Member]
Performance Factors							0
Minimum [Member] | Market Based Performance Shares
Performance Factors							0
Maximum [Member] | Performance Shares [Member]
Performance Factors							2
Maximum [Member] | Market Based Performance Shares
Performance Factors							2
Share-based Payment Arrangement, Tranche Two [Member] | Performance Shares [Member]
Granted, shares					60,019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value | $ / shares					$ 11.86
Granted, shares					60,019
Share-based Payment Arrangement, Tranche Three [Member] | Performance Shares [Member]
Granted, shares					84,483
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value | $ / shares					$ 11.86
Granted, shares					84,483

Stock-based Compensation Plan_3

Stock-based Compensation Plans Grants Table (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Granted, Value, Share-based Payment Arrangement, before Forfeiture	$ 11,900
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, shares	7,127	82,565	129,081
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 13.32	$ 12.81	$ 11.86
Shares Granted, Value, Share-based Payment Arrangement, before Forfeiture	$ 100	$ 1,100	$ 1,500
Employee Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, shares	32,916	35,325	40,286
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 2.52	$ 2.24	$ 1.92
Shares Granted, Value, Share-based Payment Arrangement, before Forfeiture	$ 100	$ 100	$ 100
Phantom Share Units (PSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, shares	3,567	1,254	180,987
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 14.29	$ 11.94	$ 11.86
Shares Granted, Value, Share-based Payment Arrangement, before Forfeiture	$ 100	$ 0	$ 2,100
Market Based Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, shares		4,187	234,199
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value		$ 14.26	$ 15.39
Shares Granted, Value, Share-based Payment Arrangement, before Forfeiture		$ 100	$ 3,600
Equity Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, shares		8,115	423,405
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value		$ 3.08	$ 3.05
Shares Granted, Value, Share-based Payment Arrangement, before Forfeiture		$ 0	$ 1,300
Share-based Payment Arrangement, Tranche Two [Member] | Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, shares			60,019
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value			$ 11.86
Shares Granted, Value, Share-based Payment Arrangement, before Forfeiture			$ 700
Share-based Payment Arrangement, Tranche Three [Member] | Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, shares			84,483
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value			$ 11.86
Shares Granted, Value, Share-based Payment Arrangement, before Forfeiture			$ 1,000

Supplemental Balance Sheet In_3

Supplemental Balance Sheet Information (Schedule Of Selected Supplemental Balance Sheet Information) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Jun. 30, 2021	Jun. 30, 2021	Sep. 30, 2020	Jun. 30, 2020
Inventories:
Purchased components and raw material	$ 102.2	$ 102.2	$ 87.3
Work in process	31.2	31.2	32.4
Finished goods	43.5	43.5	42.8
Inventories, net	176.9	176.9	162.5
Prepaid Expense and Other Assets, Current [Abstract]
Prepaid Expense	10.7	10.7	10.9
Nontrade Receivables	7.1	7.1	8.5
Other Receivables	1.1	1.1		$ 0
Maintenance and repair tooling	2.7	2.7	3.7
Income taxes	0.6	0.6	5.5
Other	4	4	0.4
Other	26.2	26.2	29
Property, plant and equipment:
Land	6.1	6.1	6.2
Buildings	81.6	81.6	80.4
Machinery and equipment	428.4	428.4	406.3
Construction in progress	76	76	57.4
Property, plant and equipment, gross	592.1	592.1	550.3
Accumulated depreciation	(316.8)	(316.8)	(296.5)
Property, plant and equipment net	275.3	275.3	253.8
Other Assets, Noncurrent [Abstract]
Operating lease, Right-of-Use asset	24	24	25.6
us-Maintenance, repair and tooling supplies	19.1	19.1	17.5
Nontrade Receivables, Noncurrent	3.2	3.2	0
Assets for Plan Benefits, Defined Benefit Plan	4.2	4.2	0.9
Notes Receivable, Related Parties, Noncurrent	1.8	1.8	1.8
Debt Issuance Costs, Noncurrent, Net	1.4	1.4	1.3
Other Assets, Miscellaneous, Noncurrent	5.2	5.2	4.2
Other noncurrent assets	58.9	58.9	51.3
Workers' Compensation Liability, Current	3.6	3.6	2.7
Goodwill, Foreign Currency Translation Gain (Loss)		2.6
Goodwill	116	$ 116	$ 99.8
Goodwill, Acquired During Period	$ 13.6

Schedule of Accrued Liabilities

Schedule of Accrued Liabilities (Details) - USD ($) $ in Millions	Jun. 30, 2021	Sep. 30, 2020
Other current liabilities:
Compensation and benefits	$ 38.9	$ 32.8
Customer rebates	16	9.6
Warranty	3.1	7.2
Deferred Revenue	7.4	5.6
Customer Refund Liability, Current	5.5	4.3
Accrual for Taxes Other than Income Taxes	4.7	3.9
Operating lease liability, current	3.8	4
Workers' Compensation Liability, Current	3.6	2.7
CARES Act deferral, current portion	3.6	0
Restructuring reserve, current	2.6	2.8
Environmental	1.2	1.2
Interest Payable	1.7	7.3
Accrued Income Taxes	0	0.2
Other Liabilities, Current	9.2	5
Accrued liabilities	101.3	86.6
Other Liabilities, Noncurrent [Abstract]
Operating lease liability, noncurrent	21.8	23.3
Standard Product Warranty Accrual, Noncurrent	8	7.2
CARES Act Deferrals	3.6	3.3
Transition Tax Liability	4.7	5.2
Unrecognized Tax Benefits	5	4.5
New market tax credit liabilities	3.9	0
Workers' Compensation Liability, Noncurrent	8.5	3.8
Asset Retirement Obligation	3.6	3.5
Grant yet to be earned	2.5	2.5
Other Accrued Liabilities, Noncurrent	3.2	3
Other Liabilities, Noncurrent, Total	$ 64.8	$ 56.3

Segment Information (Narrative)

Segment Information (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Segment Reporting Information [Line Items]
Restructuring and other charges	$ 3.9	$ 8.6	$ 6.1	$ 11.9
Operating income	42.7	20	103.9	76.1
Depreciation, Depletion and Amortization	15.2	14.5	44.6	42.8
Payments to Acquire Productive Assets	15	13.9	46.1	51.2
Net sales	310.5	228.5	815.4	698.8
Mueller Co. [Member]
Segment Reporting Information [Line Items]
Restructuring and other charges	0.2	0	(0.4)	0.4
Operating income	64	43.6	158.2	129.4
Depreciation, Depletion and Amortization	13	12.2	38.2	36.3
Payments to Acquire Productive Assets	13.8	13.4	43.3	49.1
Net sales	287.3	209.4	750.1	641.6
Mueller Co. [Member] | Central Region [Member]
Segment Reporting Information [Line Items]
Net sales	71.1	57.4	192.1	163.6
Mueller Co. [Member] | Northeast Region [Member] [Member]
Segment Reporting Information [Line Items]
Net sales	52.9	38.7	141.8	135.3
Mueller Co. [Member] | Southeast Region [Member]
Segment Reporting Information [Line Items]
Net sales	57.6	35.6	144.1	119.8
Mueller Co. [Member] | Western Region [Member]
Segment Reporting Information [Line Items]
Net sales	71.2	50.7	188.1	154.3
Mueller Co. [Member] | UNITED STATES
Segment Reporting Information [Line Items]
Net sales	252.9	182.4	666.2	573
Mueller Co. [Member] | CANADA
Segment Reporting Information [Line Items]
Net sales	27.9	20.7	60.4	47.3
Mueller Co. [Member] | Other International Locations [Member]
Segment Reporting Information [Line Items]
Net sales	6.5	6.3	23.5	21.3
Corporate
Segment Reporting Information [Line Items]
Restructuring and other charges	3.7	8.6	6.5	11.5
Operating income	(18.6)	(20)	(45.5)	(43.3)
Depreciation, Depletion and Amortization	0.1	0	0.2	0.1
Payments to Acquire Productive Assets	0	0	0.1	0.3
Mueller Technologies [Member]
Segment Reporting Information [Line Items]
Restructuring and other charges	0	0	0	0
Operating income	(2.7)	(3.6)	(8.8)	(10)
Depreciation, Depletion and Amortization	2.1	2.3	6.2	6.4
Payments to Acquire Productive Assets	1.2	0.5	2.7	1.8
Net sales	23.2	19.1	65.3	57.2
Mueller Technologies [Member] | Central Region [Member]
Segment Reporting Information [Line Items]
Net sales	5.7	5.1	17.3	13.6
Mueller Technologies [Member] | Northeast Region [Member] [Member]
Segment Reporting Information [Line Items]
Net sales	3	4.1	10	15
Mueller Technologies [Member] | Southeast Region [Member]
Segment Reporting Information [Line Items]
Net sales	8.5	5.2	22.3	16.6
Mueller Technologies [Member] | Western Region [Member]
Segment Reporting Information [Line Items]
Net sales	4.8	3.7	12.7	8.9
Mueller Technologies [Member] | UNITED STATES
Segment Reporting Information [Line Items]
Net sales	22	18.1	62.2	54.1
Mueller Technologies [Member] | CANADA
Segment Reporting Information [Line Items]
Net sales	0.5	0.3	0.9	1.2
Mueller Technologies [Member] | Other International Locations [Member]
Segment Reporting Information [Line Items]
Net sales	$ 0.7	$ 0.7	$ 2.3	$ 1.9

Segment Information (Schedule O

Segment Information (Schedule Of Selected Supplemental Balance Sheet Information) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Sep. 30, 2020
Segment Reporting Information [Line Items]
Net sales	$ 310.5	$ 228.5	$ 815.4	$ 698.8
Operating income	42.7	20	103.9	76.1
Depreciation and amortization	15.2	14.5	44.6	42.8
Restructuring and other charges	3.9	8.6	6.1	11.9
Payments to Acquire Productive Assets	15	13.9	46.1	51.2
Total assets	1,484.6		1,484.6		$ 1,395
Intangible intangible assets, net	402		402		$ 408.9
Mueller Co. [Member]
Segment Reporting Information [Line Items]
Net sales	287.3	209.4	750.1	641.6
Operating income	64	43.6	158.2	129.4
Depreciation and amortization	13	12.2	38.2	36.3
Restructuring and other charges	0.2	0	(0.4)	0.4
Payments to Acquire Productive Assets	13.8	13.4	43.3	49.1
Mueller Co. [Member] | Central Region [Member]
Segment Reporting Information [Line Items]
Net sales	71.1	57.4	192.1	163.6
Mueller Co. [Member] | Northeast Region [Member] [Member]
Segment Reporting Information [Line Items]
Net sales	52.9	38.7	141.8	135.3
Mueller Co. [Member] | Southeast Region [Member]
Segment Reporting Information [Line Items]
Net sales	57.6	35.6	144.1	119.8
Mueller Co. [Member] | Western Region [Member]
Segment Reporting Information [Line Items]
Net sales	71.2	50.7	188.1	154.3
Mueller Co. [Member] | CANADA
Segment Reporting Information [Line Items]
Net sales	27.9	20.7	60.4	47.3
Mueller Co. [Member] | Other International Locations [Member]
Segment Reporting Information [Line Items]
Net sales	6.5	6.3	23.5	21.3
Mueller Co. [Member] | UNITED STATES
Segment Reporting Information [Line Items]
Net sales	252.9	182.4	666.2	573
Mueller Technologies [Member]
Segment Reporting Information [Line Items]
Net sales	23.2	19.1	65.3	57.2
Operating income	(2.7)	(3.6)	(8.8)	(10)
Depreciation and amortization	2.1	2.3	6.2	6.4
Restructuring and other charges	0	0	0	0
Payments to Acquire Productive Assets	1.2	0.5	2.7	1.8
Mueller Technologies [Member] | Central Region [Member]
Segment Reporting Information [Line Items]
Net sales	5.7	5.1	17.3	13.6
Mueller Technologies [Member] | Northeast Region [Member] [Member]
Segment Reporting Information [Line Items]
Net sales	3	4.1	10	15
Mueller Technologies [Member] | Southeast Region [Member]
Segment Reporting Information [Line Items]
Net sales	8.5	5.2	22.3	16.6
Mueller Technologies [Member] | Western Region [Member]
Segment Reporting Information [Line Items]
Net sales	4.8	3.7	12.7	8.9
Mueller Technologies [Member] | CANADA
Segment Reporting Information [Line Items]
Net sales	0.5	0.3	0.9	1.2
Mueller Technologies [Member] | Other International Locations [Member]
Segment Reporting Information [Line Items]
Net sales	0.7	0.7	2.3	1.9
Mueller Technologies [Member] | UNITED STATES
Segment Reporting Information [Line Items]
Net sales	$ 22	$ 18.1	$ 62.2	$ 54.1

Commitments and Contingencies (

Commitments and Contingencies (Details) $ in Millions, $ in Millions	3 Months Ended	9 Months Ended
	Dec. 31, 2011CAD ($)	Jun. 30, 2021USD ($)
Loss Contingency, Damages Sought, Value	$ 10
Income Tax Examination, Penalties Accrued		$ 22.2

Subsequent Events (Details)

Subsequent Events (Details) - $ / shares	Aug. 20, 2021	Aug. 10, 2021	Jul. 29, 2021	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Subsequent Event [Line Items]
Dividends declared per share, in dollars per share				$ 0.0550	$ 0.0525	$ 0.1650	$ 0.1575
Subsequent Event [Member]
Subsequent Event [Line Items]
Dividends Payable, Date Declared			Jul. 29, 2021
Dividends declared per share, in dollars per share			$ 0.0550
Dividends Payable, Date to be Paid	Aug. 20, 2021
Dividends Payable, Date of Record		Aug. 10, 2021

Business Combinations and Ass_3

Business Combinations and Asset Acquisitions (Details) $ in Millions	Jun. 30, 2021USD ($)
Asset Acquisition [Line Items]
Receivables	$ 0.5
Inventories	0.6
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets	0.9
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	2
Goodwill	13.6
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable	(0.8)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other	(2.9)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities	(2.6)
Consideration paid considered as cash flow used in financing	19.7
Customer-Related Intangible Assets [Member]
Asset Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	2.1
Noncompete Agreements
Asset Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	0.4
Developed Technology Rights
Asset Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 5.9