Assets and Liabilities Held for Sale - Disposal Groups, Including Discontinued Operations (Details) - USD ($) $ in Millions	Mar. 31, 2023	Sep. 30, 2022
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Current assets held for sale	$ 446	$ 387
Noncurrent assets held for sale	378	751
Current liabilities held for sale	316	236
Noncurrent liabilities held for sale	59	62
Global Retail | Disposal Group, Held-for-sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Accounts receivable - net	242	199
Inventories	160	155
Other current assets	30	21
Current assets held for sale	432	375
Property, plant and equipment - net	114	89
Goodwill	0	22
Other intangible assets - net	190	514
Other noncurrent assets	71	72
Noncurrent assets held for sale	375	697
Accounts payable	126	127
Accrued compensation and benefits	16	25
Deferred revenue	47	36
Other current liabilities	116	33
Current liabilities held for sale	305	221
Other noncurrent liabilities	58	61
Noncurrent liabilities held for sale	$ 58	$ 61