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v3.25.3

Debt - Summary of Long-Term Debt (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Sep. 30, 2024
--- | --- | ---
Debt Instrument [Line Items] |  |
Long-Term Debt | $ 17,621 | $ 17,940
1.208% Notes due June 4, 2026 |  |
Debt Instrument [Line Items] |  |
Interest rate (percent) | 1.208% |
Long-Term Debt | $ 0 | 671
6.700% Notes due December 1, 2026 |  |
Debt Instrument [Line Items] |  |
Interest rate (percent) | 6.70% |
Long-Term Debt | $ 154 | 158
1.900% Notes due December 15, 2026 |  |
Debt Instrument [Line Items] |  |
Interest rate (percent) | 1.90% |
Long-Term Debt | $ 586 | 559
3.700% Notes due June 6, 2027 |  |
Debt Instrument [Line Items] |  |
Interest rate (percent) | 3.70% |
Long-Term Debt | $ 1,722 | 1,721
7.000% Debentures due August 1, 2027 |  |
Debt Instrument [Line Items] |  |
Interest rate (percent) | 7.00% |
Long-Term Debt | $ 117 | 118
4.693% Notes due February 13, 2028 |  |
Debt Instrument [Line Items] |  |
Interest rate (percent) | 4.693% |
Long-Term Debt | $ 798 | 797
6.700% Debentures due August 1, 2028 |  |
Debt Instrument [Line Items] |  |
Interest rate (percent) | 6.70% |
Long-Term Debt | $ 114 | 115
0.334% Notes due August 13, 2028 |  |
Debt Instrument [Line Items] |  |
Interest rate (percent) | 0.334% |
Long-Term Debt | $ 1,054 | 1,004
4.874% Notes due February 8, 2029 |  |
Debt Instrument [Line Items] |  |
Interest rate (percent) | 4.874% |
Long-Term Debt | $ 622 | 622
5.081% Notes due June 7, 2029 |  |
Debt Instrument [Line Items] |  |
Interest rate (percent) | 5.081% |
Long-Term Debt | $ 597 | 596
3.553% Notes due September 13, 2029 |  |
Debt Instrument [Line Items] |  |
Interest rate (percent) | 3.553% |
Long-Term Debt | $ 936 | 891
2.823% Notes due May 20, 2030 |  |
Debt Instrument [Line Items] |  |
Interest rate (percent) | 2.823% |
Long-Term Debt | $ 747 | 746
3.519% Notes due February 8, 2031 |  |
Debt Instrument [Line Items] |  |
Interest rate (percent) | 3.519% |
Long-Term Debt | $ 876 | 835
1.957% Notes due February 11, 2031 |  |
Debt Instrument [Line Items] |  |
Interest rate (percent) | 1.957% |
Long-Term Debt | $ 995 | 994
3.828% Notes due June 7, 2032 |  |
Debt Instrument [Line Items] |  |
Interest rate (percent) | 3.828% |
Long-Term Debt | $ 1,168 | 1,113
4.298% Notes due August 22, 2032 |  |
Debt Instrument [Line Items] |  |
Interest rate (percent) | 4.298% |
Long-Term Debt | $ 496 | 496
5.110% Notes due February 8, 2034 |  |
Debt Instrument [Line Items] |  |
Interest rate (percent) | 5.11% |
Long-Term Debt | $ 546 | 545
1.213% Notes due February 12, 2036 |  |
Debt Instrument [Line Items] |  |
Interest rate (percent) | 1.213% |
Long-Term Debt | $ 701 | 668
4.029% Notes due June 7, 2036 |  |
Debt Instrument [Line Items] |  |
Interest rate (percent) | 4.029% |
Long-Term Debt | $ 933 | 889
6.000% Notes due May 15, 2039 |  |
Debt Instrument [Line Items] |  |
Interest rate (percent) | 6.00% |
Long-Term Debt | $ 121 | 121
5.000% Notes due November 12, 2040 |  |
Debt Instrument [Line Items] |  |
Interest rate (percent) | 5.00% |
Long-Term Debt | $ 90 | 90
1.336% Notes due August 13, 2041 |  |
Debt Instrument [Line Items] |  |
Interest rate (percent) | 1.336% |
Long-Term Debt | $ 1,049 | 999
4.875% Notes due May 15, 2044 |  |
Debt Instrument [Line Items] |  |
Interest rate (percent) | 4.875% |
Long-Term Debt | $ 244 | 244
4.685% Notes due December 15, 2044 |  |
Debt Instrument [Line Items] |  |
Interest rate (percent) | 4.685% |
Long-Term Debt | $ 938 | 934
4.669% Notes due June 6, 2047 |  |
Debt Instrument [Line Items] |  |
Interest rate (percent) | 4.669% |
Long-Term Debt | $ 1,462 | 1,460
3.794% Notes due May 20, 2050 |  |
Debt Instrument [Line Items] |  |
Interest rate (percent) | 3.794% |
Long-Term Debt | $ 554 | 554
Other long-term debt |  |
Debt Instrument [Line Items] |  |
Long-Term Debt | $ 1 | $ 1

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