Pension Plans - Percentage of Total Plan Assets (Details) - Pension Plan	Sep. 30, 2024	Sep. 30, 2023
Defined Benefit Plan Disclosure [Line Items]
Asset Category	100.00%	100.00%
Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Asset Category	12.00%	31.00%
Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Asset Category	62.00%	42.00%
Commodity Option
Defined Benefit Plan Disclosure [Line Items]
Asset Category	6.00%	7.00%
Insurance Company
Defined Benefit Plan Disclosure [Line Items]
Asset Category	9.00%	10.00%
Options
Defined Benefit Plan Disclosure [Line Items]
Asset Category	0.00%	0.00%
Cash
Defined Benefit Plan Disclosure [Line Items]
Asset Category	11.00%	10.00%