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LOANS AND LEASES - Schedule of Loans Modified, Past Due (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases | $ 293 | $ 315 | $ 467 | $ 399 | $ 663
Current |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  | 355 | 628
30-59 Days Past Due |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  | 0 | 7
60-89 Days Past Due |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  | 0 | 6
90 Days or Greater |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  | 44 | 22
Commercial |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases | 135 | 237 | 248 | 313 | 392
Commercial | Current |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  | 278 | 373
Commercial | 30-59 Days Past Due |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  | 0 | 3
Commercial | 60-89 Days Past Due |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  | 0 | 4
Commercial | 90 Days or Greater |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  | 35 | 12
Commercial | Commercial construction |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  | 3 | 1 | 3
Commercial | Commercial construction | Current |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  | 1 | 3
Commercial | Commercial construction | 30-59 Days Past Due |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  | 0 | 0
Commercial | Commercial construction | 60-89 Days Past Due |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  | 0 | 0
Commercial | Commercial construction | 90 Days or Greater |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  | 0 | 0
Commercial | Owner occupied commercial mortgage |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases | 11 | 13 | 37 | 24 | 38
Commercial | Owner occupied commercial mortgage | Current |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  | 24 | 35
Commercial | Owner occupied commercial mortgage | 30-59 Days Past Due |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  | 0 | 0
Commercial | Owner occupied commercial mortgage | 60-89 Days Past Due |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  | 0 | 2
Commercial | Owner occupied commercial mortgage | 90 Days or Greater |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  | 0 | 1
Commercial | Non-owner occupied commercial mortgage |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases | 41 | 161 | 104 | 212 | 233
Commercial | Non-owner occupied commercial mortgage | Current |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  | 177 | 222
Commercial | Non-owner occupied commercial mortgage | 30-59 Days Past Due |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  | 0 | 0
Commercial | Non-owner occupied commercial mortgage | 60-89 Days Past Due |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  | 0 | 1
Commercial | Non-owner occupied commercial mortgage | 90 Days or Greater |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  | 35 | 10
Commercial | Commercial and industrial |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases | 83 | 63 | 104 | 76 | 118
Commercial | Commercial and industrial | Current |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  | 76 | 113
Commercial | Commercial and industrial | 30-59 Days Past Due |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  | 0 | 3
Commercial | Commercial and industrial | 60-89 Days Past Due |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  | 0 | 1
Commercial | Commercial and industrial | 90 Days or Greater |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  | 0 | 1
Consumer |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases | 5 | 5 | 13 | 6 | 24
Consumer | Current |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  | 6 | 17
Consumer | 30-59 Days Past Due |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  | 0 | 4
Consumer | 60-89 Days Past Due |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  | 0 | 2
Consumer | 90 Days or Greater |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  | 0 | 1
Consumer | Residential mortgage |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases | 3 | 5 | 9 | 6 | 18
Consumer | Residential mortgage | Current |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  | 6 | 11
Consumer | Residential mortgage | 30-59 Days Past Due |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  | 0 | 4
Consumer | Residential mortgage | 60-89 Days Past Due |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  | 0 | 2
Consumer | Residential mortgage | 90 Days or Greater |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  | 0 | 1
Consumer | Revolving mortgage |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases | 2 |  | 4 |  | 6
Consumer | Revolving mortgage | Current |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  |  | 6
Consumer | Revolving mortgage | 30-59 Days Past Due |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  |  | 0
Consumer | Revolving mortgage | 60-89 Days Past Due |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  |  | 0
Consumer | Revolving mortgage | 90 Days or Greater |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  |  | 0
SVB |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases | 153 | 73 | 206 | 80 | 247
SVB | Current |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  | 71 | 238
SVB | 30-59 Days Past Due |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  | 0 | 0
SVB | 60-89 Days Past Due |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  | 0 | 0
SVB | 90 Days or Greater |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  | 9 | 9
SVB | Investor dependent - early stage |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases | 29 | 8 | 33 | 8 | 40
SVB | Investor dependent - early stage | Current |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  | 5 | 34
SVB | Investor dependent - early stage | 30-59 Days Past Due |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  | 0 | 0
SVB | Investor dependent - early stage | 60-89 Days Past Due |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  | 0 | 0
SVB | Investor dependent - early stage | 90 Days or Greater |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  | 3 | 6
SVB | Investor dependent - growth stage |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases | 39 |  | 70 |  | 82
SVB | Investor dependent - growth stage | Current |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  |  | 79
SVB | Investor dependent - growth stage | 30-59 Days Past Due |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  |  | 0
SVB | Investor dependent - growth stage | 60-89 Days Past Due |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  |  | 0
SVB | Investor dependent - growth stage | 90 Days or Greater |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  |  | 3
SVB | Innovation C&I and cash flow dependent |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases | $ 85 | $ 65 | $ 103 | 72 | 125
SVB | Innovation C&I and cash flow dependent | Current |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  | 66 | 125
SVB | Innovation C&I and cash flow dependent | 30-59 Days Past Due |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  | 0 | 0
SVB | Innovation C&I and cash flow dependent | 60-89 Days Past Due |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  | 0 | 0
SVB | Innovation C&I and cash flow dependent | 90 Days or Greater |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans and leases |  |  |  | $ 6 | $ 0

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