Other Financial Data (Components of Depreciation and Amortization) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2019
Depreciation expense	$ 499	$ 485	$ 463
Amortization of intangibles excluding capitalized software	357	256	253
Amortization if intangibles reported in Cost of Sales	57	17	15
Amortization of capitalized software	113	113	106
Total	969	854	822
Amortization of intangible assets	470	$ 369	$ 359
Open Systems International, Inc. [Member] | Order or Production Backlog [Member]
Amortization of intangible assets	$ 30