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Debt (Tables) | 6 Months Ended
--- | ---
Mar. 31, 2024
Debt Disclosure [Abstract] |
Schedule of Debt | The Company had outstanding debt as follows:
| March 31, 2024 |  | September 30, 2023 |  | Effective Interest Rate(1)
| (in millions, except percentages)
U.S. dollar notes |  |  |  |  |
3.15% Senior Notes due December 2025 | $ | 4,000 |  |  | $ | 4,000 |  |  | 3.26 | %
1.90% Senior Notes due April 2027 | 1,500 |  |  | 1,500 |  |  | 2.02 | %
0.75% Senior Notes due August 2027 | 500 |  |  | 500 |  |  | 0.84 | %
2.75% Senior Notes due September 2027 | 750 |  |  | 750 |  |  | 2.91 | %
2.05% Senior Notes due April 2030 | 1,500 |  |  | 1,500 |  |  | 2.13 | %
1.10% Senior Notes due February 2031 | 1,000 |  |  | 1,000 |  |  | 1.20 | %
4.15% Senior Notes due December 2035 | 1,500 |  |  | 1,500 |  |  | 4.23 | %
2.70% Senior Notes due April 2040 | 1,000 |  |  | 1,000 |  |  | 2.80 | %
4.30% Senior Notes due December 2045 | 3,500 |  |  | 3,500 |  |  | 4.37 | %
3.65% Senior Notes due September 2047 | 750 |  |  | 750 |  |  | 3.73 | %
2.00% Senior Notes due August 2050 | 1,750 |  |  | 1,750 |  |  | 2.09 | %
Euro notes |  |  |  |  |
1.50% Senior Notes due June 2026 | 1,459 |  |  | 1,434 |  |  | 1.71 | %
2.00% Senior Notes due June 2029 | 1,081 |  |  | 1,062 |  |  | 2.13 | %
2.375% Senior Notes due June 2034 | 702 |  |  | 690 |  |  | 2.53 | %
Total debt | 20,992 |  |  | 20,936 |  |  |
Unamortized discounts and debt issuance costs | (151) |  |  | (159) |  |  |
Hedge accounting fair value adjustments(2) | (238) |  |  | (314) |  |  |
Total carrying value of debt | $ | 20,603 |  |  | $ | 20,463 |  |  |
Reported as: |  |  |  |  |
Current maturities of debt | $ | — |  |  | $ | — |  |  |
Long-term debt | 20,603 |  |  | 20,463 |  |  |
Total carrying value of debt | $ | 20,603 |  |  | $ | 20,463 |  |  |
(1)Effective interest rates disclosed do not reflect hedge accounting adjustments. (2)Represents the fair value of interest rate swap agreements entered into on a portion of the outstanding senior notes.

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- Definition Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation. + References No definition available. + Details
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