OPERATING SEGMENTS (Details) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2022 USD ($) country	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) segment wealthManagementCenter country	Sep. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)
Segment Reporting [Abstract]
Number of business segments | segment				3
Number of countries containing operations | country		20		20
Number of wealth management centers | wealthManagementCenter				4
Segment Reporting Information [Line Items]
Net interest income		$ 12,563	$ 10,691	$ 35,398	$ 31,675
Non-interest revenue		5,945	6,756	21,934	23,192
Total revenues, net of interest expense		18,508	17,447	57,332	54,867
Operating expense		12,749	11,777	38,307	34,661
Provisions for credit losses	[1]	1,365	(192)	3,394	(3,313)
Income (loss) from continuing operations before taxes		4,394	5,862	15,631	23,519
Provision (benefits) for income taxes		879	1,193	3,002	4,680
Income (loss) from continuing operations		3,515	4,669	12,629	18,839
Identifiable assets (September 30, 2022 and December 31, 2021)		2,381,064		2,381,064		$ 2,291,413
Average loans		655,000	669,000	654,000	668,000
Average deposits		1,316,000	1,343,000	1,324,000	1,323,000
Operating Segments | ICG
Segment Reporting Information [Line Items]
Net interest income		4,570	3,738	12,874	11,231
Non-interest revenue		4,898	6,253	19,173	19,697
Total revenues, net of interest expense		9,468	9,991	32,047	30,928
Operating expense		6,541	5,963	19,698	17,724
Provisions for credit losses		86	24	855	(2,209)
Income (loss) from continuing operations before taxes		2,841	4,004	11,494	15,413
Provision (benefits) for income taxes		655	889	2,672	3,435
Income (loss) from continuing operations		2,186	3,115	8,822	11,978
Identifiable assets (September 30, 2022 and December 31, 2021)		1,706,000		1,706,000		1,613,000
Average loans		291,000	289,000	292,000	286,000
Average deposits		817,000	831,000	824,000	819,000
Operating Segments | PBWM
Segment Reporting Information [Line Items]
Net interest income		5,836	5,174	16,790	15,324
Non-interest revenue		351	678	1,331	2,218
Total revenues, net of interest expense		6,187	5,852	18,121	17,542
Operating expense		4,077	3,624	11,951	10,593
Provisions for credit losses		1,109	(201)	2,088	(928)
Income (loss) from continuing operations before taxes		1,001	2,429	4,082	7,877
Provision (benefits) for income taxes		209	533	877	1,756
Income (loss) from continuing operations		792	1,896	3,205	6,121
Identifiable assets (September 30, 2022 and December 31, 2021)		479,000		479,000		464,000
Average loans		325,000	309,000	318,000	305,000
Average deposits		428,000	424,000	437,000	410,000
Operating Segments | Legacy Franchises
Segment Reporting Information [Line Items]
Net interest income		1,385	1,532	4,367	4,716
Non-interest revenue		1,169	4	2,053	1,342
Total revenues, net of interest expense		2,554	1,536	6,420	6,058
Operating expense		1,845	1,748	5,952	5,288
Provisions for credit losses		167	(14)	448	(174)
Income (loss) from continuing operations before taxes		542	(198)	20	944
Provision (benefits) for income taxes		226	3	104	333
Income (loss) from continuing operations		316	(201)	(84)	611
Identifiable assets (September 30, 2022 and December 31, 2021)		100,000		100,000		125,000
Average loans		39,000	71,000	44,000	77,000
Average deposits		50,000	80,000	52,000	85,000
Corporate/Other
Segment Reporting Information [Line Items]
Net interest income		772	247	1,367	404
Non-interest revenue		(473)	(179)	(623)	(65)
Total revenues, net of interest expense		299	68	744	339
Operating expense		286	442	706	1,056
Provisions for credit losses		3	(1)	3	(2)
Income (loss) from continuing operations before taxes		10	(373)	35	(715)
Provision (benefits) for income taxes		(211)	(232)	(651)	(844)
Income (loss) from continuing operations		221	(141)	686	129
Identifiable assets (September 30, 2022 and December 31, 2021)		96,000		96,000		$ 89,000
Average loans		0	0	0	0
Average deposits		$ 21,000	$ 8,000	$ 11,000	$ 9,000

[1] This total excludes the provision for credit losses on AFS securities, which is disclosed separately above.