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v3.23.3

Segment Information (Revenue and Long-Lived Assets by Geographical Areas) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2021
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Revenues | $ 1,275.7 | $ 1,247.4 | $ 1,111.0
Intangible Assets, Net (Including Goodwill) | 427.7 | 459.8 |
Total assets | $ 1,505.0 | 1,498.1 |
Document Period End Date | Sep. 30, 2023 |  |
Property, plant and equipment, net | $ 311.7 | 301.6 |
United States |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Property, plant and equipment, net | 295.6 | 284.9 |
Other |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Property, plant and equipment, net | 4.2 | 4.1 |
ISRAEL |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Property, plant and equipment, net | 11.9 | 12.6 |
Mueller Co. [Member] |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Revenues | 634.4 | 714.1 | 617.8
Intangible Assets, Net (Including Goodwill) | 283.8 | 302.6 |
Mueller Co. [Member] | Central Region [Member] |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Revenues | 176.0 | 190.9 | 155.1
Mueller Co. [Member] | United States |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Revenues | 585.9 | 653.3 | 563.6
Mueller Co. [Member] | Canada |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Revenues | 36.2 | 55.0 | 45.7
Mueller Co. [Member] | Northeast Region [Member] [Member] |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Revenues | 130.6 | 125.3 | 110.4
Mueller Co. [Member] | Southeast Region [Member] |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Revenues | 118.4 | 154.3 | 125.7
Mueller Co. [Member] | Western Region [Member] |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Revenues | 160.9 | 182.8 | 172.4
Mueller Co. [Member] | Other International Locations [Member] |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Revenues | 12.3 | 5.8 | 8.5
Mueller Technologies [Member] |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Revenues | 641.3 | 533.3 | 493.2
Intangible Assets, Net (Including Goodwill) | 143.9 | 157.2 |
Mueller Technologies [Member] | Central Region [Member] |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Revenues | 169.2 | 142.9 | 125.6
Mueller Technologies [Member] | United States |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Revenues | 576.8 | 470.3 | 431.4
Mueller Technologies [Member] | Canada |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Revenues | 38.3 | 39.2 | 38.1
Mueller Technologies [Member] | Northeast Region [Member] [Member] |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Revenues | 151.2 | 115.1 | 100.2
Mueller Technologies [Member] | Southeast Region [Member] |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Revenues | 137.4 | 109.4 | 106.5
Mueller Technologies [Member] | Western Region [Member] |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Revenues | 119.0 | 102.9 | 99.1
Mueller Technologies [Member] | Other International Locations [Member] |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Revenues | 26.2 | 23.8 | 23.7
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Ferguson Enterprises |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Accounts and Other Receivables, Net, Current | 37.7 | $ 38.6 |
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Core & Main, Inc. |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Accounts and Other Receivables, Net, Current | $ 46.4 |  | $ 52.1
Customer Concentration Risk [Member] | Sales Revenue, Goods, Gross [Member] | Ferguson Enterprises |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
10 largest customers | 18.00% | 20.00% | 19.00%
Customer Concentration Risk [Member] | Sales Revenue, Goods, Gross [Member] | Core & Main, Inc. |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
10 largest customers | 18.00% | 21.00% | 18.00%

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