CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Net revenues	$ 6,130	$ 4,837	$ 17,546	$ 16,745
Operating Expenses
Personnel	1,098	941	3,193	2,863
Marketing	268	174	679	683
Network and processing	186	172	538	536
Professional fees	108	95	273	304
Depreciation and amortization	204	197	602	571
General and administrative	204	258	770	840
Litigation provision	(2)	1	2	9
Total operating expenses	2,066	1,838	6,057	5,806
Operating income	4,064	2,999	11,489	10,939
Non-operating Income (Expense)
Interest expense, net	(131)	(142)	(388)	(371)
Investment income and other	456	75	664	167
Total non-operating income (expense)	325	(67)	276	(204)
Income before income taxes	4,389	2,932	11,765	10,735
Income tax provision	1,814	559	3,038	2,006
Net income	$ 2,575	$ 2,373	$ 8,727	$ 8,729
Class A common stock
Earnings Per Share
Basic Earnings Per Share (in dollars per share)	$ 1.18	$ 1.07	$ 3.99	$ 3.92
Basic Weighted-average Shares Outstanding (in shares)	1,691	1,690	1,693	1,702
Diluted Earnings Per Share (in dollars per share)	$ 1.18	$ 1.07	$ 3.98	$ 3.92
Diluted Weighted-average Shares Outstanding (in shares)	2,184	2,214	2,192	2,227
Class B common stock
Earnings Per Share
Basic Earnings Per Share (in dollars per share)	$ 1.92	$ 1.74	$ 6.47	$ 6.37
Basic Weighted-average Shares Outstanding (in shares)	245	245	245	245
Diluted Earnings Per Share (in dollars per share)	$ 1.91	$ 1.74	$ 6.46	$ 6.36
Diluted Weighted-average Shares Outstanding (in shares)	245	245	245	245
Class C common stock
Earnings Per Share
Basic Earnings Per Share (in dollars per share)	$ 4.72	$ 4.29	$ 15.94	$ 15.70
Basic Weighted-average Shares Outstanding (in shares)	10	11	11	11
Diluted Earnings Per Share (in dollars per share)	$ 4.72	$ 4.29	$ 15.92	$ 15.68
Diluted Weighted-average Shares Outstanding (in shares)	10	11	11	11