LOANS AND LEASES - Schedule of Financial Effects of Loans Modified (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2025	Mar. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (in Months)	11 months	21 months
Weighted Average Interest Rate Reduction	2.06%	1.52%
Weighted Average Payment Delay (in Months)	7 months	22 months
Amount of Principal Forgiven	$ 0	$ 0
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (in Months)	7 months	21 months
Weighted Average Interest Rate Reduction	1.65%	1.31%
Weighted Average Payment Delay (in Months)	7 months	41 months
Amount of Principal Forgiven	$ 0	$ 0
Commercial \| Commercial construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (in Months)	8 months	22 months
Weighted Average Interest Rate Reduction	0.00%	2.49%
Weighted Average Payment Delay (in Months)	5 months	0 months
Amount of Principal Forgiven	$ 0	$ 0
Commercial \| Owner occupied commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (in Months)	8 months	23 months
Weighted Average Interest Rate Reduction	0.00%	0.79%
Weighted Average Payment Delay (in Months)	6 months	20 months
Amount of Principal Forgiven	$ 0	$ 0
Commercial \| Non-owner occupied commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (in Months)	6 months	27 months
Weighted Average Interest Rate Reduction	0.00%	0.00%
Weighted Average Payment Delay (in Months)	6 months	48 months
Amount of Principal Forgiven	$ 0	$ 0
Commercial \| Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (in Months)	9 months	9 months
Weighted Average Interest Rate Reduction	1.65%	1.39%
Weighted Average Payment Delay (in Months)	9 months	4 months
Amount of Principal Forgiven	$ 0	$ 0
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (in Months)	24 months	53 months
Weighted Average Interest Rate Reduction	2.41%	2.41%
Weighted Average Payment Delay (in Months)	5 months	0 months
Amount of Principal Forgiven	$ 0	$ 0
Consumer \| Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (in Months)	22 months	52 months
Weighted Average Interest Rate Reduction	1.87%	1.52%
Weighted Average Payment Delay (in Months)	5 months	0 months
Amount of Principal Forgiven	$ 0	$ 0
Consumer \| Revolving mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (in Months)	60 months	59 months
Weighted Average Interest Rate Reduction	3.21%	4.15%
Weighted Average Payment Delay (in Months)	5 months	0 months
Amount of Principal Forgiven	$ 0	$ 0
Consumer \| Consumer auto
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (in Months)	20 months	30 months
Weighted Average Interest Rate Reduction	0.00%	0.26%
Weighted Average Payment Delay (in Months)	4 months	0 months
Amount of Principal Forgiven	$ 0	$ 0
Consumer \| Consumer other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (in Months)	0 months	49 months
Weighted Average Interest Rate Reduction	9.97%	9.19%
Weighted Average Payment Delay (in Months)	0 months	0 months
Amount of Principal Forgiven	$ 0	$ 0
SVB
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (in Months)	21 months	14 months
Weighted Average Interest Rate Reduction	0.00%	0.00%
Weighted Average Payment Delay (in Months)	7 months	9 months
Amount of Principal Forgiven	$ 0	$ 0
SVB \| Investor dependent - early stage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (in Months)	0 months	6 months
Weighted Average Interest Rate Reduction	0.00%	0.00%
Weighted Average Payment Delay (in Months)	5 months	7 months
Amount of Principal Forgiven	$ 0	$ 0
SVB \| Investor dependent - growth stage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (in Months)	12 months	19 months
Weighted Average Interest Rate Reduction	0.00%	0.00%
Weighted Average Payment Delay (in Months)	6 months	10 months
Amount of Principal Forgiven	$ 0	$ 0
SVB \| Innovation C&I and cash flow dependent
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (in Months)	22 months	12 months
Weighted Average Interest Rate Reduction	0.00%	0.00%
Weighted Average Payment Delay (in Months)	12 months	6 months
Amount of Principal Forgiven	$ 0	$ 0

Financing Receivable, Modified, Amount Of Principal Forgiven

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- Definition

Financing Receivable, Modified, Weighted Average Payment Delay

+ References

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 20
-Name Accounting Standards Codification
-Section 40
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481628/310-20-40-7

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481990/310-10-45-2

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- Definition

Percentage of decrease in weighted average contractual interest rate of financing receivable modified for debtor experiencing financial difficulty.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 12A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481933/310-10-55-12A

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