Pension Plans - Percentage of Total Plan Assets (Details) - Pension Plan	Sep. 30, 2022	Sep. 30, 2021
Defined Benefit Plan Disclosure [Line Items]
Asset Category	100.00%	100.00%
Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Asset Category	33.00%	35.00%
Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Asset Category	33.00%	34.00%
Commodity Option
Defined Benefit Plan Disclosure [Line Items]
Asset Category	1.00%	11.00%
Insurance Company
Defined Benefit Plan Disclosure [Line Items]
Asset Category	10.00%	12.00%
Options
Defined Benefit Plan Disclosure [Line Items]
Asset Category	2.00%	1.00%
Cash
Defined Benefit Plan Disclosure [Line Items]
Asset Category	21.00%	7.00%