Loans and Allowance for Credit Losses: Loans and Unfunded Credit Commitments - Credit Quality Indicators, Broken out by Class of Financing Receivables and Vintage Year (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	$ 11,486	$ 11,032
Year Two	7,876	5,880
Year Three	3,687	3,045
Year Four	1,951	1,279
Year Five	766	1,006
Prior	2,452	2,462
Revolving Loans	46,036	41,516
Revolving Loans Converted to Term Loans	71	77
Unallocated	(75)	(21)
Loans, amortized cost	74,250	66,276
Global fund banking
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	543	814
Year Two	90	133
Year Three	55	36
Year Four	29	6
Year Five	1	8
Prior	5	5
Revolving Loans	40,543	36,956
Revolving Loans Converted to Term Loans	3	0
Unallocated	0	0
Loans, amortized cost	41,269	37,958
Global fund banking \| Nonperforming
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	0	0
Year Two	0	0
Year Three	0	0
Year Four	0	0
Year Five	0	0
Prior	0	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Unallocated	0	0
Loans, amortized cost	0	0
Global fund banking \| Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	543	764
Year Two	90	115
Year Three	55	36
Year Four	29	6
Year Five	1	8
Prior	5	4
Revolving Loans	40,539	36,955
Revolving Loans Converted to Term Loans	3	0
Unallocated	0	0
Loans, amortized cost	41,265	37,888
Global fund banking \| Criticized
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	0	50
Year Two	0	18
Year Three	0	0
Year Four	0	0
Year Five	0	0
Prior	0	1
Revolving Loans	4	1
Revolving Loans Converted to Term Loans	0	0
Unallocated	0	0
Loans, amortized cost	4	70
Investor dependent
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	3,609	3,053
Year Two	2,046	1,374
Year Three	427	448
Year Four	58	117
Year Five	12	23
Prior	5	2
Revolving Loans	551	522
Revolving Loans Converted to Term Loans	5	5
Unallocated	0	0
Loans, amortized cost	6,713	5,544
Investor dependent \| Early stage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	1,045	820
Year Two	607	379
Year Three	63	155
Year Four	19	31
Year Five	1	6
Prior	0	1
Revolving Loans	215	201
Revolving Loans Converted to Term Loans	0	0
Unallocated	0	0
Loans, amortized cost	1,950	1,593
Investor dependent \| Early stage \| Nonperforming
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	5	2
Year Two	7	5
Year Three	1	3
Year Four	2	0
Year Five	0	0
Prior	0	0
Revolving Loans	2	1
Revolving Loans Converted to Term Loans	0	0
Unallocated	0	0
Loans, amortized cost	17	11
Investor dependent \| Early stage \| Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	910	754
Year Two	480	287
Year Three	44	122
Year Four	12	26
Year Five	1	6
Prior	0	1
Revolving Loans	182	171
Revolving Loans Converted to Term Loans	0	0
Unallocated	0	0
Loans, amortized cost	1,629	1,367
Investor dependent \| Early stage \| Criticized
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	130	64
Year Two	120	87
Year Three	18	30
Year Four	5	5
Year Five	0	0
Prior	0	0
Revolving Loans	31	29
Revolving Loans Converted to Term Loans	0	0
Unallocated	0	0
Loans, amortized cost	304	215
Investor dependent \| Growth stage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	2,564	2,233
Year Two	1,439	995
Year Three	364	293
Year Four	39	86
Year Five	11	17
Prior	5	1
Revolving Loans	336	321
Revolving Loans Converted to Term Loans	5	5
Unallocated	0	0
Loans, amortized cost	4,763	3,951
Investor dependent \| Growth stage \| Nonperforming
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	20	2
Year Two	31	0
Year Three	0	1
Year Four	0	2
Year Five	0	0
Prior	0	0
Revolving Loans	4	1
Revolving Loans Converted to Term Loans	0	0
Unallocated	0	0
Loans, amortized cost	55	6
Investor dependent \| Growth stage \| Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	2,358	2,072
Year Two	1,175	910
Year Three	283	265
Year Four	34	78
Year Five	8	14
Prior	2	1
Revolving Loans	300	286
Revolving Loans Converted to Term Loans	5	5
Unallocated	0	0
Loans, amortized cost	4,165	3,631
Investor dependent \| Growth stage \| Criticized
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	186	159
Year Two	233	85
Year Three	81	27
Year Four	5	6
Year Five	3	3
Prior	3	0
Revolving Loans	32	34
Revolving Loans Converted to Term Loans	0	0
Unallocated	0	0
Loans, amortized cost	543	314
Cash flow dependent and innovation C&I \| Cash flow dependent - SLBO
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	947	875
Year Two	584	384
Year Three	185	284
Year Four	162	107
Year Five	16	83
Prior	30	15
Revolving Loans	42	50
Revolving Loans Converted to Term Loans	0	0
Unallocated	0	0
Loans, amortized cost	1,966	1,798
Cash flow dependent and innovation C&I \| Cash flow dependent - SLBO \| Nonperforming
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	0	0
Year Two	0	0
Year Three	0	12
Year Four	0	10
Year Five	0	7
Prior	0	0
Revolving Loans	0	5
Revolving Loans Converted to Term Loans	0	0
Unallocated	0	0
Loans, amortized cost	0	34
Cash flow dependent and innovation C&I \| Cash flow dependent - SLBO \| Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	930	875
Year Two	550	384
Year Three	169	252
Year Four	162	72
Year Five	14	76
Prior	19	2
Revolving Loans	37	35
Revolving Loans Converted to Term Loans	0	0
Unallocated	0	0
Loans, amortized cost	1,881	1,696
Cash flow dependent and innovation C&I \| Cash flow dependent - SLBO \| Criticized
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	17	0
Year Two	34	0
Year Three	16	20
Year Four	0	25
Year Five	2	0
Prior	11	13
Revolving Loans	5	10
Revolving Loans Converted to Term Loans	0	0
Unallocated	0	0
Loans, amortized cost	85	68
Cash flow dependent and innovation C&I \| Innovation C&I
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	2,626	2,294
Year Two	1,533	1,188
Year Three	663	350
Year Four	190	135
Year Five	16	58
Prior	35	0
Revolving Loans	3,546	2,648
Revolving Loans Converted to Term Loans	0	0
Unallocated	0	0
Loans, amortized cost	8,609	6,673
Cash flow dependent and innovation C&I \| Innovation C&I \| Nonperforming
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	7	0
Year Two	0	0
Year Three	0	0
Year Four	0	0
Year Five	0	0
Prior	0	0
Revolving Loans	21	1
Revolving Loans Converted to Term Loans	0	0
Unallocated	0	0
Loans, amortized cost	28	1
Cash flow dependent and innovation C&I \| Innovation C&I \| Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	2,554	2,230
Year Two	1,309	1,058
Year Three	495	288
Year Four	157	123
Year Five	5	58
Prior	35	0
Revolving Loans	3,152	2,411
Revolving Loans Converted to Term Loans	0	0
Unallocated	0	0
Loans, amortized cost	7,707	6,168
Cash flow dependent and innovation C&I \| Innovation C&I \| Criticized
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	65	64
Year Two	224	130
Year Three	168	62
Year Four	33	12
Year Five	11	0
Prior	0	0
Revolving Loans	373	236
Revolving Loans Converted to Term Loans	0	0
Unallocated	0	0
Loans, amortized cost	874	504
Private Bank
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	2,782	2,952
Year Two	2,770	2,015
Year Three	1,719	1,126
Year Four	916	529
Year Five	429	434
Prior	1,012	969
Revolving Loans	837	710
Revolving Loans Converted to Term Loans	12	8
Unallocated	0	0
Loans, amortized cost	10,477	8,743
Private Bank \| Nonperforming
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	0	0
Year Two	0	0
Year Three	1	2
Year Four	2	9
Year Five	1	0
Prior	20	8
Revolving Loans	1	2
Revolving Loans Converted to Term Loans	0	0
Unallocated	0	0
Loans, amortized cost	25	21
Private Bank \| Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	2,782	2,952
Year Two	2,754	2,015
Year Three	1,718	1,122
Year Four	912	520
Year Five	427	432
Prior	978	952
Revolving Loans	832	705
Revolving Loans Converted to Term Loans	12	8
Unallocated	0	0
Loans, amortized cost	10,415	8,706
Private Bank \| Criticized
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	0	0
Year Two	16	0
Year Three	0	2
Year Four	2	0
Year Five	1	2
Prior	14	9
Revolving Loans	4	3
Revolving Loans Converted to Term Loans	0	0
Unallocated	0	0
Loans, amortized cost	37	16
CRE
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	519	329
Year Two	287	254
Year Three	232	463
Year Four	349	192
Year Five	158	283
Prior	914	1,007
Revolving Loans	119	128
Revolving Loans Converted to Term Loans	5	14
Unallocated	0	0
Loans, amortized cost	2,583	2,670
CRE \| Nonperforming
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	0	0
Year Two	0	0
Year Three	0	5
Year Four	5	0
Year Five	0	0
Prior	0	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Unallocated	0	0
Loans, amortized cost	5	5
CRE \| Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	519	326
Year Two	276	215
Year Three	193	344
Year Four	211	155
Year Five	144	236
Prior	802	868
Revolving Loans	102	110
Revolving Loans Converted to Term Loans	5	2
Unallocated	0	0
Loans, amortized cost	2,252	2,256
CRE \| Criticized
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	0	3
Year Two	11	39
Year Three	39	114
Year Four	133	37
Year Five	14	47
Prior	112	139
Revolving Loans	17	18
Revolving Loans Converted to Term Loans	0	12
Unallocated	0	0
Loans, amortized cost	326	409
Premium wine and other \| Premium wine
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	310	218
Year Two	214	119
Year Three	90	167
Year Four	142	78
Year Five	52	71
Prior	144	162
Revolving Loans	173	136
Revolving Loans Converted to Term Loans	33	34
Unallocated	0	0
Loans, amortized cost	1,158	985
Premium wine and other \| Premium wine \| Nonperforming
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	0	0
Year Two	0	0
Year Three	0	0
Year Four	0	0
Year Five	0	0
Prior	0	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Unallocated	0	0
Loans, amortized cost	0	0
Premium wine and other \| Premium wine \| Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	309	217
Year Two	209	112
Year Three	90	156
Year Four	135	69
Year Five	43	71
Prior	135	162
Revolving Loans	163	125
Revolving Loans Converted to Term Loans	33	34
Unallocated	0	0
Loans, amortized cost	1,117	946
Premium wine and other \| Premium wine \| Criticized
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	1	1
Year Two	5	7
Year Three	0	11
Year Four	7	9
Year Five	9	0
Prior	9	0
Revolving Loans	10	11
Revolving Loans Converted to Term Loans	0	0
Unallocated	0	0
Loans, amortized cost	41	39
Premium wine and other \| Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	114	61
Year Two	196	151
Year Three	150	83
Year Four	37	20
Year Five	0	16
Prior	0	0
Revolving Loans	9	7
Revolving Loans Converted to Term Loans	2	0
Unallocated	(75)	(21)
Loans, amortized cost	433	317
Premium wine and other \| Other \| Nonperforming
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	0	0
Year Two	0	0
Year Three	0	0
Year Four	0	0
Year Five	0	0
Prior	0	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Unallocated	0	0
Loans, amortized cost	0	0
Premium wine and other \| Other \| Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	114	61
Year Two	189	144
Year Three	148	82
Year Four	29	20
Year Five	0	14
Prior	0	0
Revolving Loans	9	7
Revolving Loans Converted to Term Loans	2	0
Unallocated	(75)	(21)
Loans, amortized cost	416	307
Premium wine and other \| Other \| Criticized
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	0	0
Year Two	7	7
Year Three	2	1
Year Four	8	0
Year Five	0	2
Prior	0	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Unallocated	0	0
Loans, amortized cost	17	10
Other C&I
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	36	186
Year Two	141	181
Year Three	158	88
Year Four	68	95
Year Five	82	30
Prior	307	302
Revolving Loans	216	359
Revolving Loans Converted to Term Loans	11	16
Unallocated	0	0
Loans, amortized cost	1,019	1,257
Other C&I \| Nonperforming
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	0	0
Year Two	0	0
Year Three	1	0
Year Four	0	2
Year Five	0	0
Prior	1	1
Revolving Loans	0	1
Revolving Loans Converted to Term Loans	0	0
Unallocated	0	0
Loans, amortized cost	2	4
Other C&I \| Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	34	181
Year Two	141	175
Year Three	156	82
Year Four	64	86
Year Five	81	28
Prior	284	301
Revolving Loans	207	350
Revolving Loans Converted to Term Loans	10	11
Unallocated	0	0
Loans, amortized cost	977	1,214
Other C&I \| Criticized
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	2	5
Year Two	0	6
Year Three	1	6
Year Four	4	7
Year Five	1	2
Prior	22	0
Revolving Loans	9	8

Loans and Allowance for Credit Losses: Loans and Unfunded Credit Commitments - Credit Quality Indicators, Broken out by Class of Financing Receivables and Vintage Year (Details) - USD ($)
$ in Millions