CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Sep. 30, 2024	Sep. 30, 2023
Assets [Abstract]
Cash and cash equivalents	$ 11,975	$ 16,286
Restricted cash equivalents—U.S. litigation escrow	3,089	1,764
Investment securities	3,200	3,842
Settlement receivable	4,454	2,183
Accounts receivable	2,561	2,291
Customer collateral	3,524	3,005
Current portion of client incentives	1,918	1,577
Prepaid expenses and other current assets	3,312	2,584
Total current assets	34,033	33,532
Investment securities	2,545	1,921
Client incentives	4,628	3,789
Property, equipment and technology, net	3,824	3,425
Goodwill	18,941	17,997
Intangible assets, net	26,889	26,104
Other assets	3,651	3,731
Total assets	94,511	90,499
Liabilities
Accounts payable	479	375
Settlement payable	5,265	3,269
Customer collateral	3,524	3,005
Accrued compensation and benefits	1,538	1,506
Client incentives	9,075	8,177
Accrued liabilities	4,909	5,015
Accrued litigation	1,727	1,751
Total current liabilities	26,517	23,098
Long-term debt	20,836	20,463
Deferred tax liabilities	5,301	5,114
Other liabilities	2,720	3,091
Total liabilities	55,374	51,766
Commitments and contingencies (Note 18 and Note 20)
Equity
Preferred stock	1,031	1,698
Right to recover for covered losses	(104)	(140)
Additional paid-in capital	21,229	20,452
Accumulated income	17,289	18,040
Accumulated other comprehensive income (loss):
Investment securities	30	(64)
Defined benefit pension and other postretirement plans	(16)	(155)
Derivative instruments	(213)	(177)
Foreign currency translation adjustments	(109)	(921)
Total accumulated other comprehensive income (loss)	(308)	(1,317)
Total equity	39,137	38,733
Total liabilities and equity	94,511	90,499
Class A common stock
Liabilities
Accrued liabilities	90
Equity
Common stock	0	0
Class B-1 and B-2 common stock
Equity
Common stock	0	0
Class C common stock
Equity
Common stock	$ 0	$ 0