Financial Instruments (Schedule Of Derivative Instruments) (Details) € in Millions, lb in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2022 USD ($) lb	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($) lb	Jun. 30, 2021 USD ($)	Sep. 30, 2019 EUR (€)
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) reclassified to earnings	$ 70	$ 24	$ 147	$ 64
Other Comprehensive Income (Loss), Total	64	15	181	44
Commodity Contract [Member] | Cash Flow Hedging [Member] | Cost of Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) reclassified to earnings	5	13	18	24
Commodity Contract [Member] | Cash Flow Hedging [Member] | Cost of Sales [Member] | Other Comprehensive Income (Loss) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) to other comprehensive income	(32)	8	(9)	34
Foreign Exchange Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount of foreign currency hedge positions	2,100		2,100
Foreign Exchange Contract [Member] | Other deductions, net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) reclassified to earnings	56	8	108	33
Foreign Exchange Contract [Member] | Cash Flow Hedging [Member] | Cost of Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) reclassified to earnings	10	3	21	5
Foreign Exchange Contract [Member] | Cash Flow Hedging [Member] | Cost of Sales [Member] | Other Comprehensive Income (Loss) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) to other comprehensive income	15	1	32	28
Foreign Exchange Contract [Member] | Cash Flow Hedging [Member] | Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) reclassified to earnings	(1)	0	0	2
Foreign Exchange Contract [Member] | Cash Flow Hedging [Member] | Sales [Member] | Other Comprehensive Income (Loss) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) to other comprehensive income	(3)	0	(5)	3
Foreign Exchange Contract [Member] | Net Investment Hedging [Member] | Other Comprehensive Income (Loss) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) to other comprehensive income	84	$ 6	163	$ (21)
All Commodity Hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of commodities hedged	$ 170		$ 170
Copper and Aluminum [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Weight in pounds of copper and aluminum commodity hedges | lb	45		45
Senior Notes [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Debt, face amount | €					€ 1,500