CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Millions	6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating Activities
Net income	$ 7,606	$ 6,152
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Client incentives	4,865	3,850
Share-based compensation	318	275
Depreciation and amortization of property, equipment, technology and intangible assets	405	398
Deferred income taxes	21	(27)
VE territory covered losses incurred	(16)	(17)
(Gains) losses on equity investments, net	(104)	(172)
Other	(61)	(48)
Change in operating assets and liabilities:
Settlement receivable	3	(127)
Accounts receivable	(173)	(165)
Client incentives	(4,503)	(3,262)
Other assets	(291)	(116)
Accounts payable	(75)	(41)
Settlement payable	111	210
Accrued and other liabilities	(173)	(39)
Accrued litigation	(212)	(29)
Net cash provided by (used in) operating activities	7,721	6,842
Investing Activities
Purchases of property, equipment and technology	(440)	(318)
Investment securities:
Purchases	(1,948)	(2,015)
Proceeds from maturities and sales	1,975	3,871
Acquisitions, net of cash and restricted cash acquired	(1,945)	(75)
Purchases of / contributions to other investments	(55)	(30)
Other investing activities	81	41
Net cash provided by (used in) investing activities	(2,332)	1,474
Financing Activities
Repurchase of class A common stock	(7,053)	(3,509)
Repayments of debt	0	(3,000)
Dividends paid	(1,611)	(1,404)
Proceeds from issuance of commercial paper	300	0
Cash proceeds from issuance of class A common stock under employee equity plans	113	108
Restricted stock and performance-based shares settled in cash for taxes	(116)	(140)
Net cash provided by (used in) financing activities	(8,367)	(7,945)
Effect of exchange rate changes on cash, cash equivalents, restricted cash and restricted cash equivalents	(305)	16
Increase (decrease) in cash, cash equivalents, restricted cash and restricted cash equivalents	(3,283)	387
Cash, cash equivalents, restricted cash and restricted cash equivalents at beginning of period	19,799	19,171
Cash, cash equivalents, restricted cash and restricted cash equivalents at end of period	16,516	19,558
Supplemental Disclosure
Cash paid for income taxes, net	2,107	1,505
Interest payments on debt	304	340
Accruals related to purchases of property, equipment and technology	$ 27	$ 17