CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) shares in Millions, $ in Millions	Mar. 31, 2021	Sep. 30, 2020
Assets
Cash and cash equivalents	$ 16,494	$ 16,289
Restricted cash equivalents—U.S. litigation escrow	894	901
Investment securities	2,058	3,752
Settlement receivable	1,434	1,264
Accounts receivable	1,791	1,618
Customer collateral	2,057	1,850
Current portion of client incentives	1,324	1,214
Prepaid expenses and other current assets	849	757
Total current assets	26,901	27,645
Investment securities	110	231
Client incentives	3,252	3,175
Property, equipment and technology, net	2,684	2,737
Goodwill	15,980	15,910
Intangible assets, net	27,823	27,808
Other assets	3,445	3,413
Total assets	80,195	80,919
Liabilities
Accounts payable	126	174
Settlement payable	2,000	1,736
Customer collateral	2,057	1,850
Accrued compensation and benefits	794	821
Client incentives	4,760	4,176
Accrued liabilities	2,088	1,840
Current maturities of debt	0	2,999
Accrued litigation	886	914
Total current liabilities	12,711	14,510
Long-term debt	20,974	21,071
Deferred tax liabilities	5,212	5,237
Other liabilities	3,602	3,891
Total liabilities	42,499	44,709
Equity
Right to recover for covered losses	(41)	(39)
Additional paid-in capital	18,505	16,721
Accumulated income	15,513	14,088
Accumulated other comprehensive income (loss), net:
Investment securities	1	3
Defined benefit pension and other postretirement plans	(192)	(196)
Derivative instruments	(310)	(291)
Foreign currency translation adjustments	873	838
Total accumulated other comprehensive income (loss), net	372	354
Total equity	37,696	36,210
Total liabilities and equity	80,195	80,919
Series A preferred stock
Equity
Preferred stock	713	2,437
Series B preferred stock
Equity
Preferred stock	1,097	1,106
Series C preferred stock
Equity
Preferred stock	1,537	1,543
Class A common stock
Equity
Common stock	$ 0	$ 0
Accumulated other comprehensive income (loss), net:
Common stock, shares issued (in shares)	1,694	1,683
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	2,001,622	2,001,622
Common stock, shares outstanding (in shares)	1,694	1,683
Class B common stock
Equity
Common stock	$ 0	$ 0
Accumulated other comprehensive income (loss), net:
Common stock, shares issued (in shares)	245	245
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	622	622
Common stock, shares outstanding (in shares)	245	245
Class C common stock
Equity
Common stock	$ 0	$ 0
Accumulated other comprehensive income (loss), net:
Common stock, shares issued (in shares)	11	11
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	1,097	1,097
Common stock, shares outstanding (in shares)	11	11