Loans and Allowance for Credit Losses: Loans and Unfunded Credit Commitments - Nonaccrual Loans with No Allowance for Credit Loss (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual Loans	$ 93	$ 84
Nonaccrual Loans with no Allowance for Credit Loss	25	9
Investor dependent
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual Loans	49	17
Nonaccrual Loans with no Allowance for Credit Loss	5	0
Investor dependent | Early stage
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual Loans	23	11
Nonaccrual Loans with no Allowance for Credit Loss	5	0
Investor dependent | Growth stage
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual Loans	26	6
Nonaccrual Loans with no Allowance for Credit Loss	0	0
Cash flow dependent and innovation C&I (Commercial and Industrial) | Cash flow dependent - SLBO
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual Loans	11	34
Nonaccrual Loans with no Allowance for Credit Loss	0	0
Cash flow dependent and innovation C&I (Commercial and Industrial) | Innovation C&I
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual Loans	6	1
Nonaccrual Loans with no Allowance for Credit Loss	3	1
Private bank
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual Loans	15	21
Nonaccrual Loans with no Allowance for Credit Loss	7	8
CRE
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual Loans	10	5
Nonaccrual Loans with no Allowance for Credit Loss	10	0
Other C&I
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual Loans	2	4
Nonaccrual Loans with no Allowance for Credit Loss	0	0
PPP Loans
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual Loans	0	2
Nonaccrual Loans with no Allowance for Credit Loss	$ 0	$ 0