Pension & Postretirement Plans (Schedule Of Net Periodic Pension And Net Postretirement Plan Expenses) (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 12	$ 19
Interest cost	54	34
Expected return on plan assets	(71)	(78)
Net amortization	(20)	23
Total	$ (25)	$ (2)