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Organization (Details) (USD $) In Millions, unless otherwise specified | 0 Months Ended | 12 Months Ended
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Jul. 31, 2014 | Sep. 30, 2014 business_segments
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Organization |  | Organization Mueller Water Products, Inc., a Delaware corporation, together with its consolidated subsidiaries, operates in two business segments: Mueller Co. and Anvil. Mueller Co. manufactures valves for water and gas systems, including butterfly, iron gate, tapping, check, knife, plug and ball valves, as well as dry-barrel and wet-barrel fire hydrants and metering systems, and provides leak detection and pipe condition assessment products and services for the water infrastructure industry. Anvil manufactures and sources a broad range of products, including a variety of fittings, couplings, hangers and related products. The “Company,” “we,” “us” or “our” refer to Mueller Water Products, Inc. and its subsidiaries. With regard to the Company's segments, “we,” “us” or “our” may also refer to the segment being discussed. On July 31, 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 its assets, liabilities and results of operations are included in our consolidated financial statements. In 2014, we presented the loss of $0.1 million attributable to noncontrolling interest in selling, general and administrative expenses. Noncontrolling interest is recorded at its carrying value, which approximates fair value. On April 1, 2012, we sold our former U.S. Pipe segment to USP Holdings Inc., an affiliate of Wynnchurch Capital, Ltd. U.S. Pipe's results of operations have been reclassified as discontinued operations, and its assets and liabilities reclassified as held for sale, for all prior periods. 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. 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 |  | 2
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage | 49.00% |
Payments to Acquire Interest in Joint Venture |  | $ 1.7

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