Net interest revenue (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Interest revenue
Deposits with the Federal Reserve and other central banks	$ 288	$ 99	$ (21)	$ 389	$ (62)
Deposits with banks	67	33	12	114	37
Federal funds sold and securities purchased under resale agreements	321	116	32	474	89
Loans	581	370	238	1,211	705
Securities:
Taxable	683	509	413	1,626	1,278
Exempt from federal income taxes	9	10	11	29	31
Total securities	692	519	424	1,655	1,309
Trading securities	35	22	8	78	38
Total interest revenue	1,984	1,159	693	3,921	2,116
Interest expense
Deposits	488	90	(44)	541	(130)
Federal funds purchased and securities sold under repurchase agreements	250	77	2	339	(6)
Trading liabilities	23	10	1	37	6
Other borrowed funds	1	2	3	6	6
Customer payables	48	9	(1)	57	(2)
Long-term debt	248	147	91	493	301
Total interest expense	1,058	335	52	1,473	175
Net interest revenue	926	824	641	2,448	1,941
Provision for credit losses	(30)	47	(45)	19	(214)
Net interest revenue after provision for credit losses	$ 956	$ 777	$ 686	$ 2,429	$ 2,155