| Outstanding debt |
The Company had outstanding debt as follows: | | | | | | | | | | | | | | | | | | | September 30, | | Effective Interest Rate(1) | | 2024 | | 2023 | | | (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 | 1,513 | | | 1,434 | | | 1.71 | % | 2.00% Senior Notes due June 2029 | 1,120 | | | 1,062 | | | 2.13 | % | 2.375% Senior Notes due June 2034 | 728 | | | 690 | | | 2.53 | % | | Total debt | 21,111 | | | 20,936 | | | | | Unamortized discounts and debt issuance costs | (142) | | | (159) | | | | Hedge accounting fair value adjustments(2) | (133) | | | (314) | | | | | Total carrying value of debt | $ | 20,836 | | | $ | 20,463 | | | | | | | | | | | Reported as: | | | | | | Current maturities of debt | $ | — | | | $ | — | | | | | Long-term debt | 20,836 | | | 20,463 | | | | | Total carrying value of debt | $ | 20,836 | | | $ | 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. See Note 1—Summary of Significant Accounting Policies and Note 13—Derivative and Hedging Instruments.
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| Future Principal Payments on Outstanding Debt |
As of September 30, 2024, future principal payments on the Company’s outstanding debt were as follows: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For the Years Ending September 30, | | 2025 | | 2026 | | 2027 | | 2028 | | 2029 | | Thereafter | | Total | | (in millions) | | Future principal payments | $ | — | | | $ | 5,513 | | | $ | 2,750 | | | $ | — | | | $ | 1,120 | | | $ | 11,728 | | | $ | 21,111 | |
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