LOANS - Interest Income Recognized for Non-Accrual Consumer Loans (Details) - Consumer loans - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2026	Mar. 31, 2025
Financing Receivable, Nonaccrual [Line Items]
Interest income recognized	$ 6	$ 6
Loans sold and/or reclassified to held-for-sale	213	32
In North America offices
Financing Receivable, Nonaccrual [Line Items]
Interest income recognized	4	3
In offices outside North America
Financing Receivable, Nonaccrual [Line Items]
Interest income recognized	2	3
Residential mortgages \| In North America offices
Financing Receivable, Nonaccrual [Line Items]
Interest income recognized	2	2
Residential mortgages \| In offices outside North America
Financing Receivable, Nonaccrual [Line Items]
Interest income recognized	2	2
Home equity loans \| In North America offices
Financing Receivable, Nonaccrual [Line Items]
Interest income recognized	1	1
Personal, small business and other \| In North America offices
Financing Receivable, Nonaccrual [Line Items]
Interest income recognized	1	0
Personal, small business and other \| In offices outside North America
Financing Receivable, Nonaccrual [Line Items]
Interest income recognized	$ 0	$ 1

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details