GOODWILL AND INTANGIBLE ASSETS - Changes in Goodwill (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2022	Sep. 30, 2021
Goodwill
Balance of goodwill at beginning of period	$ 19,597	$ 19,865	$ 21,299	$ 21,299
Impairment			(535)	(535)	$ 0
Divestiture			(873)
Foreign currency translation	(271)	(268)	(26)
Balance of goodwill at end of period	19,326	19,597	19,865	19,326
Goodwill impairment			535	535	$ 0
Institutional Clients Group
Goodwill
Balance of goodwill at beginning of period	8,948	9,171	9,215	9,215
Impairment			0
Divestiture			0
Foreign currency translation	(272)	(223)	(44)
Balance of goodwill at end of period	8,676	8,948	9,171	8,676
Goodwill impairment			0
Personal Banking and Wealth Management
Goodwill
Balance of goodwill at beginning of period	9,715	9,735	9,717	9,717
Impairment			0
Divestiture			0
Foreign currency translation	0	(20)	18
Balance of goodwill at end of period	9,715	9,715	9,735	9,715
Goodwill impairment			0
Legacy Franchises
Goodwill
Balance of goodwill at beginning of period	934	959	2,367	2,367
Impairment			(535)
Divestiture			(873)
Foreign currency translation	1	(25)	0
Balance of goodwill at end of period	$ 935	$ 934	959	$ 935
Goodwill impairment			535
Goodwill impairment loss, after-tax			$ 489