Organization (Details)
$ in Millions

12 Months Ended

Jul. 31, 2014

Sep. 30, 2015

USD ($)

business_segments

Sep. 30, 2014

USD ($)

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Organization

Organization

Mueller Water Products, Inc., a Delaware corporation, together with its consolidated subsidiaries, operates in three business segments: Mueller Co., Anvil and Mueller Technologies. Mueller Co. manufactures valves for water and gas systems, including butterfly, iron gate, tapping, check, knife, plug and ball valves, as well as dry-barrel and wet-barrel fire hydrants. Anvil manufactures and sources a broad range of products, including a variety of fittings, couplings, hangers and related products. Mueller Technologies offers metering systems, leak detection, pipe condition assessment and other products and services for the water infrastructure industry. The “Company,” “we,” “us” or “our” refer to Mueller Water Products, Inc. and its subsidiaries. With regard to the Company’s segments, “we,” “us” or “our” may also refer to the segment being discussed.

In July 2014, Mueller Co. acquired a 49% ownership in an industrial valve joint-venture for $1.7 million. Due to substantive control features in the joint-venture agreement, all of the joint venture’s assets, liabilities and results of operations are included in our consolidated financial statements. We included an adjustment for the loss attributable to noncontrolling interest in selling, general and administrative expenses. Noncontrolling interest is recorded at its carrying value, which approximates fair value.

Our consolidated financial statements are prepared in conformity with accounting principles generally accepted in the United States of America (“GAAP”), which require us to make certain estimates and assumptions that affect the reported amounts of assets, liabilities, sales and expenses and the disclosure of contingent assets and liabilities for the reporting periods. Actual results could differ from those estimates. All significant intercompany balances and transactions have been eliminated. Certain reclassifications have been made to previously reported amounts to conform to the current presentation.

We have recently revised our reporting segments, presenting in this annual report Mueller Co., Anvil and a new segment, Mueller Technologies, which includes Mueller Systems and Echologics.  Mueller Systems and Echologics were previously reported within the Mueller Co. segment. Segment results previously presented have been recast to conform to the current presentation.

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.

Number of Reportable Segments

3

Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage

49.00%

Payments to Acquire Interest in Joint Venture | $

$ 1.7

$ 1.7