Debt (Tables)

12 Months Ended

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