Annual report pursuant to Section 13 and 15(d)

PENSION AND OTHER POSTRETIREMENT PLANS - Weighted-Average Assumptions for Principal Retirement and Other Postretirement Benefit Plans (Details)

v3.22.2.2
PENSION AND OTHER POSTRETIREMENT PLANS - Weighted-Average Assumptions for Principal Retirement and Other Postretirement Benefit Plans (Details)
12 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2020
Pension      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate 4.01% 2.79% 2.62%
Return on plan assets 0.00% 3.10% 6.75%
Compensation increase 0.00% 3.50% 3.50%
Other Postretirement      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate 5.37% 2.83% 2.63%
Return on plan assets 0.00% 0.00% 0.00%
Compensation increase 0.00% 0.00% 0.00%