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Debt (Tables) | 12 Months Ended
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Sep. 30, 2025
Debt Disclosure [Abstract] |
Schedule of Outstanding debt | The Company had outstanding debt as follows:
| September 30, |  | Effective Interest Rate(1)
| 2025 |  | 2024 |
| (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 | 1,587 |  |  | 1,513 |  |  | 1.71 | %
2.25% Senior Notes due May 2028 | 1,470 |  |  | — |  |  | 2.57 | %
2.00% Senior Notes due June 2029 | 1,176 |  |  | 1,120 |  |  | 2.13 | %
3.125% Senior Notes due May 2033 | 1,176 |  |  | — |  |  | 3.20 | %
2.375% Senior Notes due June 2034 | 764 |  |  | 728 |  |  | 2.53 | %
3.50% Senior Notes due May 2037 | 764 |  |  | — |  |  | 3.62 | %
3.875% Senior Notes due May 2044 | 705 |  |  | — |  |  | 4.02 | %
Total debt | 25,392 |  |  | 21,111 |  |  |
Unamortized discounts and debt issuance costs | (171) |  |  | (142) |  |  |
Hedge accounting fair value adjustments(2) | (50) |  |  | (133) |  |  |
Total carrying value of debt | $ | 25,171 |  |  | $ | 20,836 |  |  |
Reported as: |  |  |  |  |
Current maturities of debt | $ | 5,569 |  |  | $ | — |  |  |
Long-term debt | 19,602 |  |  | 20,836 |  |  |
Total carrying value of debt | $ | 25,171 |  |  | $ | 20,836 |  |  |
(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. See Note 1—Summary of Significant Accounting Policies and Note 13—Derivative and Hedging Instruments.
Schedule of Future Principal Payments on Outstanding Debt | As of September 30, 2025, future principal payments on the Company’s outstanding debt were as follows:
| For the Years Ending September 30,
| 2026 |  | 2027 |  | 2028 |  | 2029 |  | 2030 |  | Thereafter |  | Total
| (in millions)
Future principal payments | $ | 5,587 |  |  | $ | 2,750 |  |  | $ | 1,470 |  |  | $ | 1,176 |  |  | $ | 1,500 |  |  | $ | 12,909 |  |  | $ | 25,392 |

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