Loans and Allowance for Credit Losses: Loans and Unfunded Credit Commitments - Summary of the Aging of Loans Broken out by Risk-based Segments (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	$ 74,250	$ 66,276
Loans Past Due 90 Days or More Still Accruing Interest	5	7
30 - 59   Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	96	63
60 - 89   Days Past  Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	17	8
90 or More Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	29	20
Total Past  Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	142	91
Current
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	74,108	66,185
Global fund banking
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	41,269	37,958
Loans Past Due 90 Days or More Still Accruing Interest	0	0
Global fund banking | 30 - 59   Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	20	0
Global fund banking | 60 - 89   Days Past  Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	0	0
Global fund banking | 90 or More Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	0	0
Global fund banking |   Total Past  Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	20	0
Global fund banking | Current
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	41,249	37,958
Investor dependent
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	6,713	5,544
Loans Past Due 90 Days or More Still Accruing Interest	0	0
Investor dependent | 30 - 59   Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	37	22
Investor dependent | 60 - 89   Days Past  Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	13	5
Investor dependent | 90 or More Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	5	0
Investor dependent |   Total Past  Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	55	27
Investor dependent | Current
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	6,658	5,517
Investor dependent | Early stage
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	1,950	1,593
Loans Past Due 90 Days or More Still Accruing Interest	0	0
Investor dependent | Early stage | 30 - 59   Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	11	6
Investor dependent | Early stage | 60 - 89   Days Past  Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	13	5
Investor dependent | Early stage | 90 or More Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	2	0
Investor dependent | Early stage |   Total Past  Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	26	11
Investor dependent | Early stage | Current
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	1,924	1,582
Investor dependent | Growth stage
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	4,763	3,951
Loans Past Due 90 Days or More Still Accruing Interest	0	0
Investor dependent | Growth stage | 30 - 59   Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	26	16
Investor dependent | Growth stage | 60 - 89   Days Past  Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	0	0
Investor dependent | Growth stage | 90 or More Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	3	0
Investor dependent | Growth stage |   Total Past  Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	29	16
Investor dependent | Growth stage | Current
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	4,734	3,935
Cash flow dependent and innovation C&I | Cash flow dependent - SLBO
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	1,966	1,798
Loans Past Due 90 Days or More Still Accruing Interest	0	0
Cash flow dependent and innovation C&I | Cash flow dependent - SLBO | 30 - 59   Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	0	0
Cash flow dependent and innovation C&I | Cash flow dependent - SLBO | 60 - 89   Days Past  Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	0	0
Cash flow dependent and innovation C&I | Cash flow dependent - SLBO | 90 or More Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	0	0
Cash flow dependent and innovation C&I | Cash flow dependent - SLBO |   Total Past  Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	0	0
Cash flow dependent and innovation C&I | Cash flow dependent - SLBO | Current
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	1,966	1,798
Cash flow dependent and innovation C&I | Innovation C&I
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	8,609	6,673
Loans Past Due 90 Days or More Still Accruing Interest	0	7
Cash flow dependent and innovation C&I | Innovation C&I | 30 - 59   Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	2	7
Cash flow dependent and innovation C&I | Innovation C&I | 60 - 89   Days Past  Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	1	0
Cash flow dependent and innovation C&I | Innovation C&I | 90 or More Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	0	7
Cash flow dependent and innovation C&I | Innovation C&I |   Total Past  Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	3	14
Cash flow dependent and innovation C&I | Innovation C&I | Current
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	8,606	6,659
Private Bank
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	10,477	8,743
Loans Past Due 90 Days or More Still Accruing Interest	1	0
Private Bank | 30 - 59   Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	22	28
Private Bank | 60 - 89   Days Past  Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	2	1
Private Bank | 90 or More Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	17	12
Private Bank |   Total Past  Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	41	41
Private Bank | Current
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	10,436	8,702
CRE
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	2,583	2,670
Loans Past Due 90 Days or More Still Accruing Interest	0	0
CRE | 30 - 59   Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	10	1
CRE | 60 - 89   Days Past  Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	1	0
CRE | 90 or More Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	0	0
CRE |   Total Past  Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	11	1
CRE | Current
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	2,572	2,669
Premium wine and other | Premium wine
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	1,158	985
Loans Past Due 90 Days or More Still Accruing Interest	0	0
Premium wine and other | Premium wine | 30 - 59   Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	3	3
Premium wine and other | Premium wine | 60 - 89   Days Past  Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	0	0
Premium wine and other | Premium wine | 90 or More Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	0	0
Premium wine and other | Premium wine |   Total Past  Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	3	3
Premium wine and other | Premium wine | Current
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	1,155	982
Premium wine and other | Other
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	433	317
Loans Past Due 90 Days or More Still Accruing Interest	0	0
Premium wine and other | Other | 30 - 59   Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	0	0
Premium wine and other | Other | 60 - 89   Days Past  Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	0	0
Premium wine and other | Other | 90 or More Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	0	0
Premium wine and other | Other |   Total Past  Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	0	0
Premium wine and other | Other | Current
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	433	317
Other C&I
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	1,019	1,257
Loans Past Due 90 Days or More Still Accruing Interest	0	0
Other C&I | 30 - 59   Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	2	1
Other C&I | 60 - 89   Days Past  Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	0	2
Other C&I | 90 or More Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	2	1
Other C&I |   Total Past  Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	4	4
Other C&I | Current
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	1,015	1,253
PPP
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	23	331
Loans Past Due 90 Days or More Still Accruing Interest	4	0
PPP | 30 - 59   Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	0	1
PPP | 60 - 89   Days Past  Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	0	0
PPP | 90 or More Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	5	0
PPP |   Total Past  Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	5	1
PPP | Current
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	$ 18	$ 330