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Retirement Plans (Tables)
 12 Months Ended
Sep. 30, 2021
Retirement Benefits [Abstract]  
Schedule of Net Periodic Benefit Cost
The components of net periodic benefit cost for our Pension Plans are presented below.

 202120202019
 (in millions)
Service cost$1.5 $1.5 $1.6 
Components of net periodic cost (benefit) excluded from operating income:
Interest cost9.9 11.2 13.9 
Expected return on plan assets(15.7)(16.9)(16.2)
Amortization of actuarial net loss2.5 2.8 1.9 
Pension settlement— — 0.7 
Other— (0.1)0.1 
Pension (benefit) cost other than service(3.3)(3.0)0.4 
Net periodic benefit (benefit) cost$(1.8)$(1.5)$2.0 
Schedule of Accumulated and Projected Benefit Obligations P
Schedule Of Defined Benefit Plans Disclosures
Amounts recognized for Pension Plans are presented below.

 20212020
 (in millions)
Projected benefit obligations:
Beginning of year$359.5 $356.6 
Service cost1.5 1.5 
Interest cost9.9 11.2 
Actuarial gain(10.8)13.7 
Benefits paid(23.3)(23.5)
End of year$336.8 $359.5 
Accumulated benefit obligations at end of year$336.8 $359.5 
Plan assets:
Beginning of year$360.4 $351.6 
Actual return on plan assets16.4 32.2 
Employer contributions— 0.1 
Benefits paid(23.3)(23.5)
End of year$353.5 $360.4 
Accrued benefit cost at end of year:
Funded status$16.8 $0.9 
Recognized on balance sheet:
Other noncurrent assets$16.8 $0.9 
Recognized in accumulated other comprehensive income (loss), before tax:
Net actuarial loss59.9 74.0 
$59.9 $74.0 
Schedule of Pension and Other Postretirement Benefits Activity in Accumulated Other Comprehensive Income (Loss) [Table Text Block] lan activity in accumulated other comprehensive loss, before tax, in 2021 is presented below, in millions.
Balance at beginning of year$74.0 
Actuarial gain(11.6)
Prior year actuarial loss amortization to net periodic cost(2.5)
Balance at end of year$59.9 
Schedule of Assumptions Used
A summary of key assumptions for the valuations of our Pension Plans is as follows

 202120202019
Weighted average used to determine benefit obligations:
Discount rate
3.01 %2.84 %3.26 %
Weighted average used to determine net periodic cost:
Discount rate
2.84 %3.26 %4.37 %
Expected return on plan assets
4.50 %5.00 %4.93 %
Schedule of Strategic Allocation of Plan Assets [Table Text Block] trategic asset allocations, tactical range at September 30, 2021 and actual asset allocations are as follows:
Strategic asset allocationActual asset allocations at
 September 30,
 Tactical range202120202019
Fixed income investments70 %65 -70 %70 %78 %79 %
Equity investments30 25 -30 %29 21 19 
Cash— 0 -5 %1 1 2 
100 %100 %100 %100 %
Schedule of Allocation of Plan Assets
The assets of the Plan by level within the fair value hierarchy are as follows:

September 30, 2021
Level 1Level 2Total
 (in millions)
Fixed income$176.7 $70.3 $247.0 
Equity:
Large cap index funds52.1 — 52.1 
International stocks:
International funds52.5 — 52.5 
      Total equity104.6 — 104.6 
Cash and cash equivalents1.9 — 1.9 
$283.2 $70.3 $353.5 
September 30, 2020
Level 1Level 2Total
 (in millions)
Fixed income$— $280.3 $280.3 
Equity:
Large cap index funds— 32.8 32.8 
  Mid cap index funds— 13.5 13.5 
Small cap growth funds— 12.7 12.7 
International stocks:
Mutual funds7.4 — 7.4 
International funds— 10.4 10.4 
Total equity7.4 69.4 76.8 
Cash and cash equivalents3.3 — 3.3 
$10.7 $349.7 $360.4 
Schedule of Expected Benefit Payments
Our estimated future pension benefit payments are presented below (in millions).


2022$24.1 
202323.9 
202423.5 
202523.1 
202622.7 
2027-2031$104.7