CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions		12 Months Ended
		Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Net revenue		$ 40,000	$ 35,926	$ 32,653
Operating Expenses
Personnel		6,961	6,264	5,831
Marketing		1,684	1,560	1,341
Network and processing		894	778	736
Professional fees		759	635	545
Depreciation and amortization		1,220	1,034	943
General and administrative		1,926	1,598	1,330
Litigation provision		2,562	462	927
Total operating expenses		16,006	12,331	11,653
Operating income		23,994	23,595	21,000
Non-operating Income (Expense)
Interest expense		(589)	(641)	(644)
Investment income (expense) and other		789	962	681
Total non-operating income (expense)		200	321	37
Income before income taxes		24,194	23,916	21,037
Income tax provision		4,136	4,173	3,764
Net income		$ 20,058	$ 19,743	$ 17,273
Class A common stock
Earnings Per Share
Basic earnings per share (in dollars per share)		$ 10.22	$ 9.74	$ 8.29
Basic weighted-average shares outstanding (in shares)		1,714	1,621	1,618
Diluted earnings per share (in dollars per share)		$ 10.20	$ 9.73	$ 8.28
Diluted weighted-average shares outstanding (in shares)		1,966	2,029	2,085
Class B-1 common stock
Earnings Per Share
Basic earnings per share (in dollars per share)		$ 15.97	$ 15.46	$ 13.26
Basic weighted-average shares outstanding (in shares)		5	148	245
Diluted earnings per share (in dollars per share)		$ 15.95	$ 15.45	$ 13.24
Diluted weighted-average shares outstanding (in shares)		5	148	245
Class B-2 common stock
Earnings Per Share
Basic earnings per share (in dollars per share)	[1]	$ 15.72	$ 15.45	$ 0
Basic weighted-average shares outstanding (in shares)	[1]	120	49	0
Diluted earnings per share (in dollars per share)	[1]	$ 15.70	$ 15.43	$ 0
Diluted weighted-average shares outstanding (in shares)	[1]	120	49	0
Class C common stock
Earnings Per Share
Basic earnings per share (in dollars per share)		$ 40.87	$ 38.97	$ 33.17
Basic weighted-average shares outstanding (in shares)		9	16	10
Diluted earnings per share (in dollars per share)		$ 40.82	$ 38.92	$ 33.13
Diluted weighted-average shares outstanding (in shares)		9	16	10

[1] (1)No shares of class B-2 common stock were outstanding prior to the class B-1 common stock exchange offer in May 2024. See Note 15—Stockholders’ Equity for further details.