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Debt and Other Obligations Debt and Other Obligations - Short-Term Debt (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021
Short-Term Debt, Gross [Line Items] |  |
Short-Term Debt | $ 1,172 | $ 780
Short-term Borrowings Gross | $ 1,173 | $ 780
Weighted average interest rate - discount notes | 2.93% | 0.03%
Foreign Currency Transaction Gain (Loss), Unrealized | $ 150 |

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- Definition Short-term Borrowings Gross + References No definition available. + Details
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- Definition Amount before tax of foreign currency transaction unrealized gain (loss) recognized in the income statement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124440516&loc=d3e30840-110895 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=125521441&loc=d3e30690-110894 + Details
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