LOANS - Schedule of Interest Income Recognized for Non-Accrual Consumer Loans (Details) - Consumer - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Nonaccrual [Line Items]
Interest income	$ 27	$ 21
Loans sold and/or reclassified to held-for-sale	582	1,473
In North America offices
Financing Receivable, Nonaccrual [Line Items]
Interest income	19	20
In offices outside North America
Financing Receivable, Nonaccrual [Line Items]
Interest income	8	1
Residential first mortgages | In North America offices
Financing Receivable, Nonaccrual [Line Items]
Interest income	12	13
Residential first mortgages | In offices outside North America
Financing Receivable, Nonaccrual [Line Items]
Interest income	4	1
Home equity loans | In North America offices
Financing Receivable, Nonaccrual [Line Items]
Interest income	5	7
Credit cards | In North America offices
Financing Receivable, Nonaccrual [Line Items]
Interest income	0	0
Credit cards | In offices outside North America
Financing Receivable, Nonaccrual [Line Items]
Interest income	0	0
Personal, small business and other | In North America offices
Financing Receivable, Nonaccrual [Line Items]
Interest income	2	0
Personal, small business and other | In offices outside North America
Financing Receivable, Nonaccrual [Line Items]
Interest income	$ 4	$ 0