Financial Instruments (Schedule Of Derivative Instruments) (Details) € in Millions, lb in Millions, $ in Millions	3 Months Ended
	Dec. 31, 2021 USD ($) lb	Dec. 31, 2020 USD ($)	Sep. 30, 2020 EUR (€)
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) reclassified to earnings	$ 54	$ 0
Other Comprehensive Income (Loss), Total	60	(35)
Commodity Contract [Member] | Cash Flow Hedging [Member] | Cost of Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) reclassified to earnings	7	3
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	13	13
Foreign Exchange Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount of foreign currency hedge positions	2,400
Foreign Exchange Contract [Member] | Other deductions, net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) reclassified to earnings	44	(4)
Foreign Exchange Contract [Member] | Cash Flow Hedging [Member] | Cost of Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) reclassified to earnings	2	0
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	3	27
Foreign Exchange Contract [Member] | Cash Flow Hedging [Member] | Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) reclassified to earnings	1	1
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	0	5
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	44	$ (80)
All Commodity Hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of commodities hedged	$ 143
Copper and Aluminum [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Weight in pounds of copper and aluminum commodity hedges | lb	40
Senior Notes [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Debt, face amount | €			€ 1,500