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v3.19.2

Organization (Details) $ in Millions |  | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Jul. 31, 2014 | Jun. 30, 2019 USD ($) | Jun. 30, 2018 USD ($) | Jun. 30, 2019 USD ($) | Jun. 30, 2018 USD ($) | Sep. 30, 2017
Segment Reporting Information [Line Items] |  |  |  |  |  |
Beginning balance |  |  |  | $ 0.9 | $ 3.3 |
Restructuring |  | $ 2.5 | $ 2.6 | 12.6 | 8.4 |
Payments |  |  |  | 4.6 | $ 6.3 |
Number of Reportable Segments |  |  |  |  | 2,000,000 |
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage | 49.00% |  |  |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost other than Service Cost |  | $ (0.1) | $ 0.2 | $ 0.8 | $ 0.7 |
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent |  | 21.00% | 24.50% | 21.00% | 24.50% | 35.00%
Other Nonrecurring Expense |  | $ 0.7 |  |  |  |
Other Nonrecurring (Income) Expense |  |  |  | $ 4.9 |  |
Mueller Co. [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Restructuring |  | $ 0.0 | $ 0.0 | $ 1.1 | $ 0.1 |

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