Loans and Leases - Schedule of Loan Modifications (Details) $ in Millions	3 Months Ended
	Mar. 31, 2023 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 92
Total as a % of Loan and Lease Class	0.07%
Term Extension
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 83
Weighted Average Term Extension (Months)	5 months
Term Extension and Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 6
Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (Months)	4 months
Weighted Average Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Interest Rate Reduction	1.18%
Term Extension and Other Than Insignificant Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 3
Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (Months)	8 months
Weighted Average Payment Delay (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Payment Delay (Months)	8 months
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 85
Total as a % of Loan and Lease Class	0.16%
Commercial | Term Extension
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 76
Weighted Average Term Extension (Months)	5 months
Commercial | Term Extension and Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 6
Commercial | Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (Months)	4 months
Commercial | Weighted Average Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Interest Rate Reduction	1.19%
Commercial | Term Extension and Other Than Insignificant Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 3
Commercial | Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (Months)	8 months
Commercial | Weighted Average Payment Delay (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Payment Delay (Months)	8 months
Commercial | Commercial construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 1
Total as a % of Loan and Lease Class	0.02%
Commercial | Commercial construction | Term Extension
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 1
Weighted Average Term Extension (Months)	9 months
Commercial | Commercial construction | Term Extension and Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0
Commercial | Commercial construction | Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (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%
Commercial | Commercial construction | Term Extension and Other Than Insignificant Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0
Commercial | Commercial construction | Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (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
Commercial | Owner occupied commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 10
Total as a % of Loan and Lease Class	0.07%
Commercial | Owner occupied commercial mortgage | Term Extension
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 10
Weighted Average Term Extension (Months)	11 months
Commercial | Owner occupied commercial mortgage | Term Extension and Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0
Commercial | Owner occupied commercial mortgage | Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (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	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
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
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
Commercial | Non-owner occupied commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 53
Total as a % of Loan and Lease Class	0.51%
Commercial | Non-owner occupied commercial mortgage | Term Extension
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 53
Weighted Average Term Extension (Months)	3 months
Commercial | Non-owner occupied commercial mortgage | Term Extension and Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 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
Commercial | Non-owner occupied commercial mortgage | Weighted Average Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Interest Rate Reduction	1.10%
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
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
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
Commercial | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 21
Total as a % of Loan and Lease Class	0.09%
Commercial | Commercial and industrial | Term Extension
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 12
Weighted Average Term Extension (Months)	6 months
Commercial | Commercial and industrial | Term Extension and Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 6
Commercial | Commercial and industrial | Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (Months)	3 months
Commercial | Commercial and industrial | Weighted Average Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Interest Rate Reduction	1.17%
Commercial | Commercial and industrial | Term Extension and Other Than Insignificant Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 3
Commercial | Commercial and industrial | Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (Months)	8 months
Commercial | Commercial and industrial | Weighted Average Payment Delay (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Payment Delay (Months)	8 months
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 1
Total as a % of Loan and Lease Class	0.01%
Consumer | Term Extension
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 1
Weighted Average Term Extension (Months)	29 months
Consumer | Term Extension and Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0
Consumer | Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (Months)	60 months
Consumer | Weighted Average Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Interest Rate Reduction	0.39%
Consumer | Term Extension and Other Than Insignificant Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0
Consumer | Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (Months)	0 months
Consumer | Weighted Average Payment Delay (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Payment Delay (Months)	0 months
Consumer | Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 1
Total as a % of Loan and Lease Class	0.01%
Consumer | Residential mortgage | Term Extension
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 1
Weighted Average Term Extension (Months)	29 months
Consumer | Residential mortgage | Term Extension and Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0
Consumer | Residential mortgage | Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (Months)	0 months
Consumer | Residential mortgage | Weighted Average Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Interest Rate Reduction	0.00%
Consumer | Residential mortgage | Term Extension and Other Than Insignificant Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0
Consumer | Residential mortgage | Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (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
SVB
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 6
Total as a % of Loan and Lease Class	0.01%
SVB | Term Extension
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 6
Weighted Average Term Extension (Months)	6 months
SVB | Term Extension and Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0
SVB | Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (Months)	0 months
SVB | Weighted Average Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Interest Rate Reduction	0.00%
SVB | Term Extension and Other Than Insignificant Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0
SVB | Weighted Average Term Extension (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Term Extension (Months)	0 months
SVB | Weighted Average Payment Delay (Months)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Payment Delay (Months)	0 months
SVB | Investor dependent - early stage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 6
Total as a % of Loan and Lease Class	0.14%
SVB | Investor dependent - early stage | Term Extension
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 6
Weighted Average Term Extension (Months)	6 months
SVB | Investor dependent - early stage | Term Extension and Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 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
SVB | Investor dependent - early stage | Weighted Average Interest Rate Reduction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Interest Rate Reduction	0.00%
SVB | Investor dependent - early stage | Term Extension and Other Than Insignificant Payment Delay
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 0
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
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