Defined Benefit Pension and Other Postretirement Plans (Tables)

9 Months Ended

Jun. 30, 2023

Retirement Benefits [Abstract]

Schedule of Components of Net Periodic Pension Benefit

Net periodic pension benefit includes the following components:

	Pension Benefits
Three Months Ended June 30,	2023		2022
Service cost	$	2	$	4
Interest cost	9		6
Expected return on assets	(11)		(12)
Amortization of:
Actuarial (gain) loss	(1)		2
Net benefit	$	(1)	$	—
Nine Months Ended June 30,	2023		2022
Service cost	$	7	$	12
Interest cost	26		19
Expected return on plan assets	(34)		(37)
Amortization of:
Actuarial (gain) loss	(2)		6
Net benefit	$	(3)	$	—