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Organization Restructuring (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2022 | Mar. 31, 2021 | Mar. 31, 2022 | Mar. 31, 2021 | Sep. 30, 2021 | Sep. 30, 2020
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring | $ 2.1 | $ 2.2 | $ 2.1 | $ 2.2 | $ 3.1 | $ 2.8
Restructuring and other charges | $ 0.6 | $ 0.8 | 3.0 | 2.2 |  |
Payments |  |  | (2.6) | (1.6) |  |
Mueller One Project [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring and other charges |  |  | $ 1.6 | $ 1.0 |  |

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