Retirement Plan And Other Post-Retirement Benefits (Narrative) (Details) $ in Millions	3 Months Ended
	Dec. 31, 2023 USD ($)
Retirement Plan
Defined Benefit Plan Disclosure [Line Items]
Company's contributions	$ 0
Retirement Plan | Minimum
Defined Benefit Plan Disclosure [Line Items]
Estimated future contributions in remainder of fiscal year	0
Retirement Plan | Maximum
Defined Benefit Plan Disclosure [Line Items]
Estimated future contributions in remainder of fiscal year	5
VEBA Trusts
Defined Benefit Plan Disclosure [Line Items]
Company's contributions	0
Estimated future contributions in remainder of fiscal year	$ 0