Income Taxes Components of Provision for Income Taxes on Continuing Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2019
Current
U.S. federal	$ 459	$ 309	$ (1,025)
U.S. state	108	72	(33)
Non-U.S.	265	264	213
Total	832	645	(845)
Deferred
U.S. federal	(7)	(382)	412
U.S. state	46	(43)	84
Non-U.S.	(3)	(112)	116
Total	36	(537)	612
Income tax provision	868	108	(233)
Income from Continuing Operations before Income Taxes, Domestic	543	(385)	(259)
Income from Continuing Operations before Income Taxes, Foreign	2,071	1,288	1,315
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	2,614	903	1,056
Income Taxes Paid, Net	504	(386)	$ 377
Income Taxes Receivable, Current	120	252
Taxes Payable, Current	201	$ 243
Undistributed Earnings of Foreign Subsidiaries	$ 22,800