GOODWILL AND INTANGIBLE ASSETS - Goodwill Rollforward (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Goodwill [Roll Forward]
Beginning balance	$ 7,116	$ 7,050
Business acquisitions	1,057	66
Ending balance	8,173	7,116
Consumer Banking
Goodwill [Roll Forward]
Beginning balance	2,258	2,258
Business acquisitions	415	0
Ending balance	2,673	2,258
Commercial Banking
Goodwill [Roll Forward]
Beginning balance	4,858	4,792
Business acquisitions	642	66
Ending balance	$ 5,500	$ 4,858