Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies Improving the Presentation of Net Periodic Pension Cost (Details)

v3.20.2
Summary of Significant Accounting Policies Improving the Presentation of Net Periodic Pension Cost (Details) - USD ($)
$ in Millions
9 Months Ended
Jun. 30, 2020
Jun. 30, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
2017 Periodic Pension Cost Restatement $ 0.0 $ (0.2)