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, 2021	Dec. 31, 2020
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	$ 66,276	$ 45,181
Loans Past Due 90 Days or More Still Accruing Interest	7	0
30 - 59   Days Past   Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	63	59
60 - 89   Days Past   Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	8	7
Equal to or Greater Than 90   Days Past   Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	20	2
Total Past   Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	91	68
Current
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	66,185	45,113
Global fund banking
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	37,958	25,543
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	0	28
Global fund banking | 60 - 89   Days Past   Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	0	0
Global fund banking | Equal to or Greater Than 90   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	0	28
Global fund banking | Current
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	37,958	25,515
Investor dependent
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	5,544	4,972
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	22	17
Investor dependent | 60 - 89   Days Past   Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	5	2
Investor dependent | Equal to or Greater Than 90   Days Past   Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	0	1
Investor dependent |   Total Past   Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	27	20
Investor dependent | Current
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	5,517	4,952
Investor dependent | Early stage
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	1,593	1,486
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	6	6
Investor dependent | Early stage | 60 - 89   Days Past   Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	5	2
Investor dependent | Early stage | Equal to or Greater Than 90   Days Past   Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	0	0
Investor dependent | Early stage |   Total Past   Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	11	8
Investor dependent | Early stage | Current
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	1,582	1,478
Investor dependent | Growth stage
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	3,951	3,486
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	16	11
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 | Equal to or Greater Than 90   Days Past   Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	0	1
Investor dependent | Growth stage |   Total Past   Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	16	12
Investor dependent | Growth stage | Current
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	3,935	3,474
Cash flow dependent and innovation C&I (Commercial and Industrial) | Cash flow dependent - SLBO
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	1,798	1,989
Loans Past Due 90 Days or More Still Accruing Interest	0	0
Cash flow dependent and innovation C&I (Commercial and Industrial) | 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 (Commercial and Industrial) | 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 (Commercial and Industrial) | Cash flow dependent - SLBO | Equal to or Greater Than 90   Days Past   Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	0	0
Cash flow dependent and innovation C&I (Commercial and Industrial) | 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 (Commercial and Industrial) | Cash flow dependent - SLBO | Current
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	1,798	1,989
Cash flow dependent and innovation C&I (Commercial and Industrial) | Innovation C&I (Commercial and Industrial)
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	6,673	5,136
Loans Past Due 90 Days or More Still Accruing Interest	7	0
Cash flow dependent and innovation C&I (Commercial and Industrial) | Innovation C&I (Commercial and Industrial) | 30 - 59   Days Past   Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	7	7
Cash flow dependent and innovation C&I (Commercial and Industrial) | Innovation C&I (Commercial and Industrial) | 60 - 89   Days Past   Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	0	1
Cash flow dependent and innovation C&I (Commercial and Industrial) | Innovation C&I (Commercial and Industrial) | Equal to or Greater Than 90   Days Past   Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	7	0
Cash flow dependent and innovation C&I (Commercial and Industrial) | Innovation C&I (Commercial and Industrial) |   Total Past   Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	14	8
Cash flow dependent and innovation C&I (Commercial and Industrial) | Innovation C&I (Commercial and Industrial) | Current
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	6,659	5,128
Private Bank
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	8,743	4,901
Loans Past Due 90 Days or More Still Accruing Interest	0	0
Private Bank | 30 - 59   Days Past   Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	28	4
Private Bank | 60 - 89   Days Past   Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	1	4
Private Bank | Equal to or Greater Than 90   Days Past   Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	12	0
Private Bank |   Total Past   Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	41	8
Private Bank | Current
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	8,702	4,893
CRE
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	2,670	0
Loans Past Due 90 Days or More Still Accruing Interest	0
CRE | 30 - 59   Days Past   Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	1
CRE | 60 - 89   Days Past   Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	0
CRE | Equal to or Greater Than 90   Days Past   Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	0
CRE |   Total Past   Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	1
CRE | Current
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	2,669
Premium wine and other | Premium wine
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	985	1,053
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 | Equal to or Greater Than 90   Days Past   Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	0	1
Premium wine and other | Premium wine |   Total Past   Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	3	4
Premium wine and other | Premium wine | Current
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	982	1,049
Premium wine and other | Other
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	317	28
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 | Equal to or Greater Than 90   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	317	28
Other C&I
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	1,257	0
Loans Past Due 90 Days or More Still Accruing Interest	0
Other C&I | 30 - 59   Days Past   Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	1
Other C&I | 60 - 89   Days Past   Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	2
Other C&I | Equal to or Greater Than 90   Days Past   Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	1
Other C&I |   Total Past   Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	4
Other C&I | Current
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	1,253
PPP
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	331	1,559
Loans Past Due 90 Days or More Still Accruing Interest	0	0
PPP | 30 - 59   Days Past   Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	1	0
PPP | 60 - 89   Days Past   Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	0	0
PPP | Equal to or Greater Than 90   Days Past   Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	0	0
PPP |   Total Past   Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	1	0
PPP | Current
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, amortized cost	$ 330	$ 1,559