Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash Flows from Operating Activities
Net income	$ 6,341	$ 1,697
Adjustments to reconcile net income to net cash provided by operating activities:
Provisions for credit losses	(1,472)	4,841
Depreciation and amortization	1,276	1,115
Deferred taxes and other	(446)	79
Stock-based compensation	256	175
Changes in operating assets and liabilities, net of effects of acquisitions and dispositions:
Other assets	863	(1,432)
Accounts payable & other liabilities	2,819	(4,384)
Net cash provided by operating activities	9,637	2,091
Cash Flows from Investing Activities
Sale of investment securities	37	58
Maturities and redemptions of investment securities	12,803	4,881
Purchase of investments	(1,179)	(18,977)
Net (increase) decrease in Card Member loans and receivables, and other loans	(9,790)	32,262
Purchase of premises and equipment, net of sales: 2021, $41; 2020, $1	(1,079)	(1,042)
Other investing activities	1	7
Net cash provided by investing activities	793	17,189
Cash Flows from Financing Activities
Net (decrease) increase in customer deposits	(2,534)	12,158
Net increase (decrease) in short-term borrowings	428	(4,737)
Proceeds from long-term debt	38	0
Payments of long-term debt	(8,247)	(13,699)
Issuance of American Express preferred shares	1,584	0
Redemption of American Express preferred shares	(850)	0
Issuance of American Express common shares	54	34
Repurchase of American Express common shares and other	(4,681)	(1,026)
Dividends paid	(1,090)	(1,112)
Net cash used in financing activities	(15,298)	(8,382)
Effect of foreign currency exchange rates on cash and cash equivalents	(181)	283
Net (decrease) increase in cash and cash equivalents	(5,049)	11,181
Cash and cash equivalents at beginning of period	32,965	24,446
Cash and cash equivalents at end of period	$ 27,916	$ 35,627