Defined Benefit Pension and Other Postretirement Plans (Tables)

9 Months Ended

Jun. 30, 2024

Retirement Benefits [Abstract]

Schedule of Components of Net Periodic Pension Benefit Cost (Income)

Net periodic pension benefit cost (income) includes the following components:

	Pension Benefits
Three Months Ended June 30,	2024		2023
Service cost	$	2	$	2
Interest cost	9		9
Expected return on assets	(11)		(11)
Amortization of:
Actuarial gain	—		(1)
Net benefit income	$	—	$	(1)
Nine Months Ended June 30,	2024		2023
Service cost	$	6	$	7
Interest cost	27		26
Expected return on plan assets	(33)		(34)
Amortization of:
Actuarial loss (gain)	1		(2)
Net benefit cost (income)	$	1	$	(3)