GOODWILL AND INTANGIBLE ASSETS - Other Intangibles (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Finite-Lived Intangible Assets [Line Items]
Gross	$ 298	$ 294
Accumulated Amortization	183	148
Net	$ 115	146
Core deposits
Finite-Lived Intangible Assets [Line Items]
Amortizable Lives	10 years
Gross	$ 144	144
Accumulated Amortization	85	66
Net	59	78
Acquired technology
Finite-Lived Intangible Assets [Line Items]
Gross	24	23
Accumulated Amortization	23	22
Net	1	1
Acquired relationships
Finite-Lived Intangible Assets [Line Items]
Gross	52	52
Accumulated Amortization	37	31
Net	15	21
Naming Rights
Finite-Lived Intangible Assets [Line Items]
Gross	33	33
Accumulated Amortization	21	16
Net	12	17
Other
Finite-Lived Intangible Assets [Line Items]
Gross	45	42
Accumulated Amortization	17	13
Net	$ 28	$ 29
Minimum | Acquired technology
Finite-Lived Intangible Assets [Line Items]
Amortizable Lives	3 years
Minimum | Acquired relationships
Finite-Lived Intangible Assets [Line Items]
Amortizable Lives	2 years
Minimum | Naming Rights
Finite-Lived Intangible Assets [Line Items]
Amortizable Lives	5 years
Minimum | Other
Finite-Lived Intangible Assets [Line Items]
Amortizable Lives	2 years
Maximum | Acquired technology
Finite-Lived Intangible Assets [Line Items]
Amortizable Lives	7 years
Maximum | Acquired relationships
Finite-Lived Intangible Assets [Line Items]
Amortizable Lives	15 years
Maximum | Naming Rights
Finite-Lived Intangible Assets [Line Items]
Amortizable Lives	10 years
Maximum | Other
Finite-Lived Intangible Assets [Line Items]
Amortizable Lives	10 years