Loans and Leases - Schedule of Loan Modifications (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 295	$ 640
Total as a % of Loan and Lease Class	0.22%	0.48%
Loan term extension
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 247	$ 566
Weighted Average Term Extension (Months)	9 months	12 months
Other Than Insignificant Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 39	$ 60
Weighted Average Payment Delay (Months)	6 months	6 months
Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 2
Total as a % of Loan and Lease Class	7.69%	4.01%
Term Extension and Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 9	$ 12
Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (Months)	17 months	28 months
Weighted Average Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Interest Rate Reduction	1.45%	1.98%
Term Extension and Other Than Insignificant Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (Months)	0 months	0 months
Weighted Average Payment Delay (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Payment Delay (Months)	0 months	0 months
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 208	$ 482
Total as a % of Loan and Lease Class	0.36%	0.83%
Commercial | Loan term extension
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 192	$ 449
Weighted Average Term Extension (Months)	8 months	13 months
Commercial | Other Than Insignificant Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 13	$ 28
Weighted Average Payment Delay (Months)	7 months	6 months
Commercial | Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 2
Total as a % of Loan and Lease Class	4.25%	3.63%
Commercial | Term Extension and Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 3	$ 3
Commercial | Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (Months)	22 months	23 months
Commercial | Weighted Average Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Interest Rate Reduction	2.11%	2.24%
Commercial | Term Extension and Other Than Insignificant Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
Commercial | Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (Months)	0 months	0 months
Commercial | Weighted Average Payment Delay (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Payment Delay (Months)	0 months	0 months
Commercial | Commercial construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 13	$ 14
Total as a % of Loan and Lease Class	0.40%	0.41%
Commercial | Commercial construction | Loan term extension
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 13	$ 14
Weighted Average Term Extension (Months)	3 months	4 months
Commercial | Commercial construction | Other Than Insignificant Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
Weighted Average Payment Delay (Months)	0 months	0 months
Commercial | Commercial construction | Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
Total as a % of Loan and Lease Class	0.00%	0.00%
Commercial | Commercial construction | Term Extension and Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
Commercial | Commercial construction | Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (Months)	0 months	0 months
Commercial | Commercial construction | Weighted Average Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Interest Rate Reduction	0.00%	0.00%
Commercial | Commercial construction | Term Extension and Other Than Insignificant Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
Commercial | Commercial construction | Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (Months)	0 months	0 months
Commercial | Commercial construction | Weighted Average Payment Delay (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Payment Delay (Months)	0 months	0 months
Commercial | Owner occupied commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 1	$ 25
Total as a % of Loan and Lease Class	0.01%	0.16%
Commercial | Owner occupied commercial mortgage | Loan term extension
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 1	$ 23
Weighted Average Term Extension (Months)	19 months	14 months
Commercial | Owner occupied commercial mortgage | Other Than Insignificant Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
Weighted Average Payment Delay (Months)	0 months	0 months
Commercial | Owner occupied commercial mortgage | Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 2
Total as a % of Loan and Lease Class	4.25%	3.63%
Commercial | Owner occupied commercial mortgage | Term Extension and Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
Commercial | Owner occupied commercial mortgage | Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (Months)	0 months	36 months
Commercial | Owner occupied commercial mortgage | Weighted Average Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Interest Rate Reduction	0.00%	2.00%
Commercial | Owner occupied commercial mortgage | Term Extension and Other Than Insignificant Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
Commercial | Owner occupied commercial mortgage | Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (Months)	0 months	0 months
Commercial | Owner occupied commercial mortgage | Weighted Average Payment Delay (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Payment Delay (Months)	0 months	0 months
Commercial | Non-owner occupied commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 137	$ 309
Total as a % of Loan and Lease Class	1.25%	2.82%
Commercial | Non-owner occupied commercial mortgage | Loan term extension
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 137	$ 309
Weighted Average Term Extension (Months)	6 months	11 months
Commercial | Non-owner occupied commercial mortgage | Other Than Insignificant Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
Weighted Average Payment Delay (Months)	0 months	0 months
Commercial | Non-owner occupied commercial mortgage | Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
Total as a % of Loan and Lease Class	0.00%	0.00%
Commercial | Non-owner occupied commercial mortgage | Term Extension and Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
Commercial | Non-owner occupied commercial mortgage | Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (Months)	0 months	0 months
Commercial | Non-owner occupied commercial mortgage | Weighted Average Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Interest Rate Reduction	0.00%	0.00%
Commercial | Non-owner occupied commercial mortgage | Term Extension and Other Than Insignificant Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
Commercial | Non-owner occupied commercial mortgage | Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (Months)	0 months	0 months
Commercial | Non-owner occupied commercial mortgage | Weighted Average Payment Delay (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Payment Delay (Months)	0 months	0 months
Commercial | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 57	$ 134
Total as a % of Loan and Lease Class	0.22%	0.51%
Commercial | Commercial and industrial | Loan term extension
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 41	$ 103
Weighted Average Term Extension (Months)	14 months	20 months
Commercial | Commercial and industrial | Other Than Insignificant Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 13	$ 28
Weighted Average Payment Delay (Months)	7 months	6 months
Commercial | Commercial and industrial | Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
Total as a % of Loan and Lease Class	0.00%	14.40%
Commercial | Commercial and industrial | Term Extension and Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 3	$ 3
Commercial | Commercial and industrial | Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (Months)	22 months	23 months
Commercial | Commercial and industrial | Weighted Average Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Interest Rate Reduction	2.11%	2.25%
Commercial | Commercial and industrial | Term Extension and Other Than Insignificant Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
Commercial | Commercial and industrial | Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (Months)	0 months	0 months
Commercial | Commercial and industrial | Weighted Average Payment Delay (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Payment Delay (Months)	0 months	0 months
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 3	$ 8
Total as a % of Loan and Lease Class	0.02%	0.05%
Consumer | Loan term extension
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 3	$ 5
Weighted Average Term Extension (Months)	103 months	89 months
Consumer | Other Than Insignificant Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
Weighted Average Payment Delay (Months)	0 months	0 months
Consumer | Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
Total as a % of Loan and Lease Class	8.35%	8.86%
Consumer | Term Extension and Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 3
Consumer | Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (Months)	56 months	61 months
Consumer | Weighted Average Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Interest Rate Reduction	3.44%	3.38%
Consumer | Term Extension and Other Than Insignificant Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
Consumer | Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (Months)	0 months	0 months
Consumer | Weighted Average Payment Delay (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Payment Delay (Months)	0 months	0 months
Consumer | Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 3	$ 8
Total as a % of Loan and Lease Class	0.02%	0.06%
Consumer | Residential mortgage | Loan term extension
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 3	$ 5
Weighted Average Term Extension (Months)	106 months	91 months
Consumer | Residential mortgage | Other Than Insignificant Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
Weighted Average Payment Delay (Months)	0 months	0 months
Consumer | Residential mortgage | Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
Total as a % of Loan and Lease Class	0.00%	0.00%
Consumer | Residential mortgage | Term Extension and Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 3
Consumer | Residential mortgage | Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (Months)	48 months	62 months
Consumer | Residential mortgage | Weighted Average Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Interest Rate Reduction	5.25%	3.52%
Consumer | Residential mortgage | Term Extension and Other Than Insignificant Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
Consumer | Residential mortgage | Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (Months)	0 months	0 months
Consumer | Residential mortgage | Weighted Average Payment Delay (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Payment Delay (Months)	0 months	0 months
Consumer | Revolving mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
Total as a % of Loan and Lease Class	0.02%	0.03%
Consumer | Revolving mortgage | Loan term extension
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
Weighted Average Term Extension (Months)	60 months	60 months
Consumer | Revolving mortgage | Other Than Insignificant Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
Weighted Average Payment Delay (Months)	0 months	0 months
Consumer | Revolving mortgage | Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
Total as a % of Loan and Lease Class	0.00%	0.00%
Consumer | Revolving mortgage | Term Extension and Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
Consumer | Revolving mortgage | Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (Months)	57 months	54 months
Consumer | Revolving mortgage | Weighted Average Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Interest Rate Reduction	3.40%	2.44%
Consumer | Revolving mortgage | Term Extension and Other Than Insignificant Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
Consumer | Revolving mortgage | Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (Months)	0 months	0 months
Consumer | Revolving mortgage | Weighted Average Payment Delay (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Payment Delay (Months)	0 months	0 months
Consumer | Consumer auto
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost		$ 0
Total as a % of Loan and Lease Class		0.01%
Consumer | Consumer auto | Loan term extension
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost		$ 0
Weighted Average Term Extension (Months)		18 months
Consumer | Consumer auto | Other Than Insignificant Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost		$ 0
Weighted Average Payment Delay (Months)		0 months
Consumer | Consumer auto | Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost		$ 0
Total as a % of Loan and Lease Class		0.00%
Consumer | Consumer auto | Term Extension and Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost		$ 0
Consumer | Consumer auto | Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (Months)		31 months
Consumer | Consumer auto | Weighted Average Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Interest Rate Reduction		0.70%
Consumer | Consumer auto | Term Extension and Other Than Insignificant Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost		$ 0
Consumer | Consumer auto | Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (Months)		0 months
Consumer | Consumer auto | Weighted Average Payment Delay (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Payment Delay (Months)		0 months
Consumer | Consumer other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
Total as a % of Loan and Lease Class	0.01%	0.02%
Consumer | Consumer other | Loan term extension
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
Weighted Average Term Extension (Months)	0 months	60 months
Consumer | Consumer other | Other Than Insignificant Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
Weighted Average Payment Delay (Months)	0 months	0 months
Consumer | Consumer other | Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
Total as a % of Loan and Lease Class	8.35%	8.86%
Consumer | Consumer other | Term Extension and Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
Consumer | Consumer other | Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (Months)	36 months	36 months
Consumer | Consumer other | Weighted Average Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Interest Rate Reduction	0.25%	0.25%
Consumer | Consumer other | Term Extension and Other Than Insignificant Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
Consumer | Consumer other | Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (Months)	0 months	0 months
Consumer | Consumer other | Weighted Average Payment Delay (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Payment Delay (Months)	0 months	0 months
SVB
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 84	$ 150
Total as a % of Loan and Lease Class	0.15%	0.26%
SVB | Loan term extension
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 52	$ 112
Weighted Average Term Extension (Months)	7 months	6 months
SVB | Other Than Insignificant Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 26	$ 32
Weighted Average Payment Delay (Months)	5 months	5 months
SVB | Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
Total as a % of Loan and Lease Class	0.00%	0.00%
SVB | Term Extension and Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 6	$ 6
SVB | Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (Months)	12 months	12 months
SVB | Weighted Average Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Interest Rate Reduction	1.00%	1.00%
SVB | Term Extension and Other Than Insignificant Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
SVB | Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (Months)	0 months	0 months
SVB | Weighted Average Payment Delay (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Payment Delay (Months)	0 months	0 months
SVB | Investor dependent - early stage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 20	$ 27
Total as a % of Loan and Lease Class	1.17%	1.59%
SVB | Investor dependent - early stage | Loan term extension
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 2	$ 3
Weighted Average Term Extension (Months)	3 months	4 months
SVB | Investor dependent - early stage | Other Than Insignificant Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 12	$ 18
Weighted Average Payment Delay (Months)	5 months	5 months
SVB | Investor dependent - early stage | Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
Total as a % of Loan and Lease Class	0.00%	0.00%
SVB | Investor dependent - early stage | Term Extension and Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 6	$ 6
SVB | Investor dependent - early stage | Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (Months)	12 months	12 months
SVB | Investor dependent - early stage | Weighted Average Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Interest Rate Reduction	1.00%	1.00%
SVB | Investor dependent - early stage | Term Extension and Other Than Insignificant Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
SVB | Investor dependent - early stage | Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (Months)	0 months	0 months
SVB | Investor dependent - early stage | Weighted Average Payment Delay (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Payment Delay (Months)	0 months	0 months
SVB | Investor dependent - growth stage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 23	$ 23
Total as a % of Loan and Lease Class	0.58%	0.58%
SVB | Investor dependent - growth stage | Loan term extension
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 9	$ 9
Weighted Average Term Extension (Months)	11 months	11 months
SVB | Investor dependent - growth stage | Other Than Insignificant Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 14	$ 14
Weighted Average Payment Delay (Months)	5 months	5 months
SVB | Investor dependent - growth stage | Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
Total as a % of Loan and Lease Class	0.00%	0.00%
SVB | Investor dependent - growth stage | Term Extension and Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
SVB | Investor dependent - growth stage | Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (Months)	0 months	0 months
SVB | Investor dependent - growth stage | Weighted Average Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Interest Rate Reduction	0.00%	0.00%
SVB | Investor dependent - growth stage | Term Extension and Other Than Insignificant Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
SVB | Investor dependent - growth stage | Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (Months)	0 months	0 months
SVB | Investor dependent - growth stage | Weighted Average Payment Delay (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Payment Delay (Months)	0 months	0 months
SVB | Innovation C&I and cash flow dependent
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 20	$ 79
Total as a % of Loan and Lease Class	0.23%	0.90%
SVB | Innovation C&I and cash flow dependent | Loan term extension
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 20	$ 79
Weighted Average Term Extension (Months)	4 months	4 months
SVB | Innovation C&I and cash flow dependent | Other Than Insignificant Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
Weighted Average Payment Delay (Months)	0 months	0 months
SVB | Innovation C&I and cash flow dependent | Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
Total as a % of Loan and Lease Class	0.00%	0.00%
SVB | Innovation C&I and cash flow dependent | Term Extension and Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
SVB | Innovation C&I and cash flow dependent | Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (Months)	0 months	0 months
SVB | Innovation C&I and cash flow dependent | Weighted Average Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Interest Rate Reduction	0.00%	0.00%
SVB | Innovation C&I and cash flow dependent | Term Extension and Other Than Insignificant Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
SVB | Innovation C&I and cash flow dependent | Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (Months)	0 months	0 months
SVB | Innovation C&I and cash flow dependent | Weighted Average Payment Delay (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Payment Delay (Months)	0 months	0 months
SVB | Private Bank
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 4	$ 4
Total as a % of Loan and Lease Class	0.04%	0.04%
SVB | Private Bank | Loan term extension
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 4	$ 4
Weighted Average Term Extension (Months)	11 months	11 months
SVB | Private Bank | Other Than Insignificant Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
Weighted Average Payment Delay (Months)	0 months	0 months
SVB | Private Bank | Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
Total as a % of Loan and Lease Class	0.00%	0.00%
SVB | Private Bank | Term Extension and Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
SVB | Private Bank | Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (Months)	0 months	0 months
SVB | Private Bank | Weighted Average Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Interest Rate Reduction	0.00%	0.00%
SVB | Private Bank | Term Extension and Other Than Insignificant Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
SVB | Private Bank | Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (Months)	0 months	0 months
SVB | Private Bank | Weighted Average Payment Delay (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Payment Delay (Months)	0 months	0 months
SVB | CRE
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 14	$ 14
Total as a % of Loan and Lease Class	0.54%	0.54%
SVB | CRE | Loan term extension
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 14	$ 14
Weighted Average Term Extension (Months)	9 months	9 months
SVB | CRE | Other Than Insignificant Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
Weighted Average Payment Delay (Months)	0 months	0 months
SVB | CRE | Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
Total as a % of Loan and Lease Class	0.00%	0.00%
SVB | CRE | Term Extension and Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
SVB | CRE | Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (Months)	0 months	0 months
SVB | CRE | Weighted Average Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Interest Rate Reduction	0.00%	0.00%
SVB | CRE | Term Extension and Other Than Insignificant Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
SVB | CRE | Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (Months)	0 months	0 months
SVB | CRE | Weighted Average Payment Delay (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Payment Delay (Months)	0 months	0 months
SVB | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 3	$ 3
Total as a % of Loan and Lease Class	0.10%	0.10%
SVB | Other | Loan term extension
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 3	$ 3
Weighted Average Term Extension (Months)	6 months	7 months
SVB | Other | Other Than Insignificant Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
Weighted Average Payment Delay (Months)	0 months	0 months
SVB | Other | Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
Total as a % of Loan and Lease Class	0.00%	0.00%
SVB | Other | Term Extension and Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
SVB | Other | Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (Months)	0 months	0 months
SVB | Other | Weighted Average Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Interest Rate Reduction	0.00%	0.00%
SVB | Other | Term Extension and Other Than Insignificant Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0	$ 0
SVB | Other | Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (Months)	0 months	0 months
SVB | Other | Weighted Average Payment Delay (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Payment Delay (Months)	0 months	0 months