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Leases (Tables) | 3 Months Ended
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Dec. 31, 2021
Leases [Abstract] |
Supplemental Balance Sheet Information Leases [Table Text Block] | The following table presents supplemental consolidated statement of financial position information as of December 31, 2021 and September 30, 2021 (in millions):
| Location of lease balances |  | December 31, 2021 |  | September 30, 2021
Operating lease right-of-use assets | Other noncurrent assets |  | $ | 1,341 |  |  | $ | 1,376 |
Operating lease liabilities - current | Other current liabilities |  | 314 |  |  | 319 |
Operating lease liabilities - noncurrent | Other noncurrent liabilities |  | 1,022 |  |  | 1,055 |
Supplemental Lease Cash Flow Information [Table Text Block] | The following table presents supplemental noncash operating lease activity, excluding leases acquired in business combinations, for the three months ended December 31, 2021 and 2020 (in millions):
|  |  |  | Three Months Ended December 31, |  |
|  |  |  |  |  | 2021 |  | 2020 |  |
Right-of-use assets obtained in exchange for operating lease liabilities |  |  |  |  |  | $ | 55 |  |  | $ | 175 |  |  |

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- Definition [Table Text Block] for Supplemental Lease Cash Flow Information [Table] + References No definition available. + Details
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