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v3.23.1

Organization (Details) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2023 USD ($) business_segments | Mar. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Mar. 31, 2023 USD ($) | Mar. 31, 2022 USD ($)
Segment Reporting Information [Line Items] |  |  |  |  |
Restructuring and other charges | $ 0.7 | $ 0.6 |  | $ (3.0) | $ 3.0
Pension costs (benefits) other then service | $ 1.0 | $ (1.0) |  | $ 1.9 | $ (2.0)
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 21.00% | 21.00% |  | 21.00% | 21.00%
Number of Reportable Segments | business_segments | 2 |  |  |  |
Payments for (Proceeds from) Previous Acquisition |  |  | $ 19.5 |  |
Payments for Previous Acquisition |  |  | $ 0.2 |  |
Other Sundry Liabilities, Noncurrent | $ 3.9 |  |  | $ 3.9 |
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 |
Mueller Co. [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Restructuring and other charges | $ 0.0 | $ 0.0 |  | $ 0.0 | $ 0.0

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