OPERATING SEGMENTS (Details) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2023 USD ($) country	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) segment wealthManagementCenter country	Jun. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Segment Reporting [Abstract]
Number of operating 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		$ 13,900	$ 11,964	$ 27,248	$ 22,835
Non-interest revenue		5,536	7,674	13,635	15,989
Total revenues, net of interest expense		19,436	19,638	40,883	38,824
Operating expense		13,570	12,393	26,859	25,558
Provisions for credit losses and for benefits and claims	[1]	1,824	1,274	3,799	2,029
Income (loss) from continuing operations before taxes		4,042	5,971	10,225	11,237
Provision (benefits) for income taxes		1,090	1,182	2,621	2,123
Income (loss) from continuing operations		2,952	4,789	7,604	9,114
Identifiable assets (June 30, 2023 and December 31, 2022)		2,423,675		2,423,675		$ 2,416,676
Average loans		654,000	657,000	654,000	653,000
Average deposits		1,338,000	1,323,000	1,351,000	1,328,000
Operating Segments | ICG
Segment Reporting Information [Line Items]
Net interest income		5,623	4,520	10,651	8,304
Non-interest revenue		4,818	6,899	11,023	14,275
Total revenues, net of interest expense		10,441	11,419	21,674	22,579
Operating expense		7,286	6,434	14,259	13,157
Provisions for credit losses and for benefits and claims		58	(202)	(14)	769
Income (loss) from continuing operations before taxes		3,097	5,187	7,429	8,653
Provision (benefits) for income taxes		878	1,209	1,912	2,017
Income (loss) from continuing operations		2,219	3,978	5,517	6,636
Identifiable assets (June 30, 2023 and December 31, 2022)		1,765,000		1,765,000		1,730,000
Average loans		278,000	297,000	281,000	293,000
Average deposits		837,000	830,000	845,000	828,000
Operating Segments | PBWM
Segment Reporting Information [Line Items]
Net interest income		5,963	5,569	11,897	10,954
Non-interest revenue		432	460	946	980
Total revenues, net of interest expense		6,395	6,029	12,843	11,934
Operating expense		4,204	3,985	8,458	7,874
Provisions for credit losses and for benefits and claims		1,579	1,355	3,170	979
Income (loss) from continuing operations before taxes		612	689	1,215	3,081
Provision (benefits) for income taxes		118	136	232	668
Income (loss) from continuing operations		494	553	983	2,413
Identifiable assets (June 30, 2023 and December 31, 2022)		473,000		473,000		494,000
Average loans		339,000	317,000	336,000	315,000
Average deposits		431,000	435,000	433,000	441,000
Operating Segments | Legacy Franchises
Segment Reporting Information [Line Items]
Net interest income		1,345	1,474	2,635	2,982
Non-interest revenue		578	461	2,140	884
Total revenues, net of interest expense		1,923	1,935	4,775	3,866
Operating expense		1,778	1,814	3,530	4,107
Provisions for credit losses and for benefits and claims		300	121	645	281
Income (loss) from continuing operations before taxes		(155)	0	600	(522)
Provision (benefits) for income taxes		(33)	15	116	(122)
Income (loss) from continuing operations		(122)	(15)	484	(400)
Identifiable assets (June 30, 2023 and December 31, 2022)		92,000		92,000		97,000
Average loans		37,000	43,000	37,000	45,000
Average deposits		51,000	51,000	51,000	53,000
Corporate/Other
Segment Reporting Information [Line Items]
Net interest income		969	401	2,065	595
Non-interest revenue		(292)	(146)	(474)	(150)
Total revenues, net of interest expense		677	255	1,591	445
Operating expense		302	160	612	420
Provisions for credit losses and for benefits and claims		(113)	0	(2)	0
Income (loss) from continuing operations before taxes		488	95	981	25
Provision (benefits) for income taxes		127	(178)	361	(440)
Income (loss) from continuing operations		361	273	620	465
Identifiable assets (June 30, 2023 and December 31, 2022)		94,000		94,000		$ 96,000
Average loans		0	0	0	0
Average deposits		$ 19,000	$ 7,000	$ 22,000	$ 6,000

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