Defined Benefit Pension and Other Postretirement Plans (Tables)

6 Months Ended

Mar. 31, 2023

Retirement Benefits [Abstract]

Schedule of Components of Net Periodic Pension Cost

Net periodic pension cost includes the following components:

	Pension Benefits
Three Months Ended March 31,	2023		2022
Service cost	$	3	$	4
Interest cost	8		7
Expected return on assets	(12)		(13)
Amortization of:
Actuarial loss	—		2
Net benefit	$	(1)	$	—
Six Months Ended March 31,	2023		2022
Service cost	$	5	$	8
Interest cost	17		13
Expected return on plan assets	(23)		(25)
Amortization of:
Actuarial (gain) loss	(1)		4
Net benefit	$	(2)	$	—