LOANS AND LEASES - Schedule of Loans Charge-offs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year one	$ 63	$ 20
Year two	115	113
Year three	103	194
Year four	117	56
Year five	22	47
Prior year	53	124
Revolving	266	101
Revolving Converted to Term Loans	2	2
Total	741	657	$ 638
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year one	63	19
Year two	111	109
Year three	100	191
Year four	115	54
Year five	22	47
Prior year	46	122
Revolving	249	84
Revolving Converted to Term Loans	2	1
Total	708	627	610
Commercial | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year one	33	19
Year two	36	54
Year three	66	88
Year four	57	26
Year five	12	8
Prior year	7	23
Revolving	240	75
Revolving Converted to Term Loans	2	1
Total	453	294
Commercial | Capital call lines
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year one	0	0
Year two	0	0
Year three	0	0
Year four	0	0
Year five	0	0
Prior year	0	0
Revolving	0	0
Revolving Converted to Term Loans	0	0
Total	0	0
Commercial | Owner occupied commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year one	0	0
Year two	3	0
Year three	0	0
Year four	0	0
Year five	3	0
Prior year	1	12
Revolving	0	0
Revolving Converted to Term Loans	0	0
Total	7	12
Commercial | Investor dependent
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year one	4	0
Year two	31	55
Year three	31	103
Year four	37	28
Year five	7	3
Prior year	6	6
Revolving	9	9
Revolving Converted to Term Loans	0	0
Total	125	204
Commercial | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year one	26	0
Year two	41	0
Year three	3	0
Year four	21	0
Year five	0	36
Prior year	32	81
Revolving	0	0
Revolving Converted to Term Loans	0	0
Total	123	117
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year one	0	1
Year two	4	4
Year three	3	3
Year four	2	2
Year five	0	0
Prior year	7	2
Revolving	17	17
Revolving Converted to Term Loans	0	1
Total	33	30	$ 28
Consumer | Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year one	0	0
Year two	0	0
Year three	0	0
Year four	0	0
Year five	0	0
Prior year	7	1
Revolving	0	0
Revolving Converted to Term Loans	0	0
Total	7	1
Consumer | Revolving mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year one	0	0
Year two	0	0
Year three	0	0
Year four	0	0
Year five	0	0
Prior year	0	0
Revolving	0	0
Revolving Converted to Term Loans	0	1
Total	0	1
Consumer | Auto
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year one	0	1
Year two	2	2
Year three	2	2
Year four	1	1
Year five	0	0
Prior year	0	0
Revolving	0	0
Revolving Converted to Term Loans	0	0
Total	5	6
Consumer | Other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year one	0	0
Year two	2	2
Year three	1	1
Year four	1	1
Year five	0	0
Prior year	0	1
Revolving	17	17
Revolving Converted to Term Loans	0	0
Total	$ 21	$ 22