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, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	$ 11,032	$ 9,153
Year Two	5,880	4,008
Year Three	3,045	1,863
Year Four	1,279	934
Year Five	1,006	530
Prior	2,462	600
Revolving Loans	41,516	28,038
Revolving Loans Converted to Term Loans	77	55
Unallocated	(21)
Loans, amortized cost	66,276	45,181
Global fund banking
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	814	440
Year Two	133	48
Year Three	36	69
Year Four	6	23
Year Five	8	2
Prior	5	6
Revolving Loans	36,956	24,947
Revolving Loans Converted to Term Loans	0	8
Unallocated	0
Loans, amortized cost	37,958	25,543
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
Loans, amortized cost	0	0
Global fund banking | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	764	440
Year Two	115	48
Year Three	36	69
Year Four	6	23
Year Five	8	2
Prior	4	6
Revolving Loans	36,955	24,947
Revolving Loans Converted to Term Loans	0	2
Unallocated	0
Loans, amortized cost	37,888	25,537
Global fund banking | Criticized
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	50	0
Year Two	18	0
Year Three	0	0
Year Four	0	0
Year Five	0	0
Prior	1	0
Revolving Loans	1	0
Revolving Loans Converted to Term Loans	0	6
Unallocated	0
Loans, amortized cost	70	6
Investor dependent
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	3,053	2,544
Year Two	1,374	1,254
Year Three	448	528
Year Four	117	116
Year Five	23	10
Prior	2	17
Revolving Loans	522	494
Revolving Loans Converted to Term Loans	5	9
Unallocated	0
Loans, amortized cost	5,544	4,972
Investor dependent | Early stage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	820	716
Year Two	379	452
Year Three	155	152
Year Four	31	43
Year Five	6	5
Prior	1	1
Revolving Loans	201	116
Revolving Loans Converted to Term Loans	0	1
Unallocated	0
Loans, amortized cost	1,593	1,486
Investor dependent | Early stage | Nonperforming
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	2	2
Year Two	5	9
Year Three	3	5
Year Four	0	1
Year Five	0	0
Prior	0	0
Revolving Loans	1	1
Revolving Loans Converted to Term Loans	0	0
Unallocated	0
Loans, amortized cost	11	18
Investor dependent | Early stage | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	754	667
Year Two	287	370
Year Three	122	121
Year Four	26	32
Year Five	6	1
Prior	1	1
Revolving Loans	171	96
Revolving Loans Converted to Term Loans	0	1
Unallocated	0
Loans, amortized cost	1,367	1,289
Investor dependent | Early stage | Criticized
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	64	47
Year Two	87	73
Year Three	30	26
Year Four	5	10
Year Five	0	4
Prior	0	0
Revolving Loans	29	19
Revolving Loans Converted to Term Loans	0	0
Unallocated	0
Loans, amortized cost	215	179
Investor dependent | Growth stage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	2,233	1,828
Year Two	995	802
Year Three	293	376
Year Four	86	73
Year Five	17	5
Prior	1	16
Revolving Loans	321	378
Revolving Loans Converted to Term Loans	5	8
Unallocated	0
Loans, amortized cost	3,951	3,486
Investor dependent | Growth stage | Nonperforming
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	2	17
Year Two	0	3
Year Three	1	4
Year Four	2	3
Year Five	0	0
Prior	0	0
Revolving Loans	1	6
Revolving Loans Converted to Term Loans	0	0
Unallocated	0
Loans, amortized cost	6	33
Investor dependent | Growth stage | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	2,072	1,746
Year Two	910	696
Year Three	265	316
Year Four	78	61
Year Five	14	5
Prior	1	9
Revolving Loans	286	325
Revolving Loans Converted to Term Loans	5	8
Unallocated	0
Loans, amortized cost	3,631	3,166
Investor dependent | Growth stage | Criticized
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	159	65
Year Two	85	103
Year Three	27	56
Year Four	6	9
Year Five	3	0
Prior	0	7
Revolving Loans	34	47
Revolving Loans Converted to Term Loans	0	0
Unallocated	0
Loans, amortized cost	314	287
Cash flow dependent and innovation C&I (Commercial and Industrial) | Cash flow dependent - SLBO
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	875	791
Year Two	384	534
Year Three	284	329
Year Four	107	196
Year Five	83	50
Prior	15	0
Revolving Loans	50	89
Revolving Loans Converted to Term Loans	0	0
Unallocated	0
Loans, amortized cost	1,798	1,989
Cash flow dependent and innovation C&I (Commercial and Industrial) | Cash flow dependent - SLBO | Nonperforming
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	0	0
Year Two	0	12
Year Three	12	16
Year Four	10	7
Year Five	7	0
Prior	0	0
Revolving Loans	5	5
Revolving Loans Converted to Term Loans	0	0
Unallocated	0
Loans, amortized cost	34	40
Cash flow dependent and innovation C&I (Commercial and Industrial) | Cash flow dependent - SLBO | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	875	791
Year Two	384	452
Year Three	252	274
Year Four	72	167
Year Five	76	37
Prior	2	0
Revolving Loans	35	75
Revolving Loans Converted to Term Loans	0	0
Unallocated	0
Loans, amortized cost	1,696	1,796
Cash flow dependent and innovation C&I (Commercial and Industrial) | Cash flow dependent - SLBO | Criticized
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	0	0
Year Two	0	70
Year Three	20	39
Year Four	25	22
Year Five	0	13
Prior	13	0
Revolving Loans	10	9
Revolving Loans Converted to Term Loans	0	0
Unallocated	0
Loans, amortized cost	68	153
Cash flow dependent and innovation C&I (Commercial and Industrial) | Innovation C&I (Commercial and Industrial)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	2,294	1,793
Year Two	1,188	775
Year Three	350	417
Year Four	135	156
Year Five	58	39
Prior	0	0
Revolving Loans	2,648	1,955
Revolving Loans Converted to Term Loans	0	1
Unallocated	0
Loans, amortized cost	6,673	5,136
Cash flow dependent and innovation C&I (Commercial and Industrial) | Innovation C&I (Commercial and Industrial) | Nonperforming
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	0	0
Year Two	0	0
Year Three	0	5
Year Four	0	0
Year Five	0	0
Prior	0	0
Revolving Loans	1	1
Revolving Loans Converted to Term Loans	0	0
Unallocated	0
Loans, amortized cost	1	6
Cash flow dependent and innovation C&I (Commercial and Industrial) | Innovation C&I (Commercial and Industrial) | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	2,230	1,718
Year Two	1,058	703
Year Three	288	378
Year Four	123	152
Year Five	58	39
Prior	0	0
Revolving Loans	2,411	1,791
Revolving Loans Converted to Term Loans	0	1
Unallocated	0
Loans, amortized cost	6,168	4,782
Cash flow dependent and innovation C&I (Commercial and Industrial) | Innovation C&I (Commercial and Industrial) | Criticized
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	64	75
Year Two	130	72
Year Three	62	34
Year Four	12	4
Year Five	0	0
Prior	0	0
Revolving Loans	236	163
Revolving Loans Converted to Term Loans	0	0
Unallocated	0
Loans, amortized cost	504	348
Private Bank
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	2,952	1,881
Year Two	2,015	1,163
Year Three	1,126	402
Year Four	529	354
Year Five	434	300
Prior	969	416
Revolving Loans	710	384
Revolving Loans Converted to Term Loans	8	1
Unallocated	0
Loans, amortized cost	8,743	4,901
Private Bank | Nonperforming
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	0	0
Year Two	0	0
Year Three	2	3
Year Four	9	0
Year Five	0	0
Prior	8	2
Revolving Loans	2	1
Revolving Loans Converted to Term Loans	0	0
Unallocated	0
Loans, amortized cost	21	6
Private Bank | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	2,952	1,878
Year Two	2,015	1,153
Year Three	1,122	394
Year Four	520	353
Year Five	432	295
Prior	952	406
Revolving Loans	705	382
Revolving Loans Converted to Term Loans	8	1
Unallocated	0
Loans, amortized cost	8,706	4,862
Private Bank | Criticized
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	0	3
Year Two	0	10
Year Three	2	5
Year Four	0	1
Year Five	2	5
Prior	9	8
Revolving Loans	3	1
Revolving Loans Converted to Term Loans	0	0
Unallocated	0
Loans, amortized cost	16	33
CRE
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	329
Year Two	254
Year Three	463
Year Four	192
Year Five	283
Prior	1,007
Revolving Loans	128
Revolving Loans Converted to Term Loans	14
Unallocated	0
Loans, amortized cost	2,670	0
CRE | Nonperforming
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	0
Year Two	0
Year Three	5
Year Four	0
Year Five	0
Prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Unallocated	0
Loans, amortized cost	5
CRE | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	326
Year Two	215
Year Three	344
Year Four	155
Year Five	236
Prior	868
Revolving Loans	110
Revolving Loans Converted to Term Loans	2
Unallocated	0
Loans, amortized cost	2,256
CRE | Criticized
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	3
Year Two	39
Year Three	114
Year Four	37
Year Five	47
Prior	139
Revolving Loans	18
Revolving Loans Converted to Term Loans	12
Unallocated	0
Loans, amortized cost	409
Premium wine and other | Premium wine
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	218	145
Year Two	119	218
Year Three	167	107
Year Four	78	89
Year Five	71	129
Prior	162	160
Revolving Loans	136	169
Revolving Loans Converted to Term Loans	34	36
Unallocated	0
Loans, amortized cost	985	1,053
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	1
Prior	0	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Unallocated	0
Loans, amortized cost	0	1
Premium wine and other | Premium wine | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	217	127
Year Two	112	194
Year Three	156	71
Year Four	69	79
Year Five	71	115
Prior	162	154
Revolving Loans	125	135
Revolving Loans Converted to Term Loans	34	36
Unallocated	0
Loans, amortized cost	946	911
Premium wine and other | Premium wine | Criticized
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	1	18
Year Two	7	24
Year Three	11	36
Year Four	9	10
Year Five	0	13
Prior	0	6
Revolving Loans	11	34
Revolving Loans Converted to Term Loans	0	0
Unallocated	0
Loans, amortized cost	39	141
Premium wine and other | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	61	0
Year Two	151	16
Year Three	83	11
Year Four	20	0
Year Five	16	0
Prior	0	1
Revolving Loans	7	0
Revolving Loans Converted to Term Loans	0	0
Unallocated	(21)
Loans, amortized cost	317	28
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
Loans, amortized cost	0	0
Premium wine and other | Other | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	61	0
Year Two	144	16
Year Three	82	11
Year Four	20	0
Year Five	14	0
Prior	0	1
Revolving Loans	7	0
Revolving Loans Converted to Term Loans	0	0
Unallocated	(21)
Loans, amortized cost	307	28
Premium wine and other | Other | Criticized
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	0	0
Year Two	7	0
Year Three	1	0
Year Four	0	0
Year Five	2	0
Prior	0	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Unallocated	0
Loans, amortized cost	10	0
Other C&I
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	186
Year Two	181
Year Three	88
Year Four	95
Year Five	30
Prior	302
Revolving Loans	359
Revolving Loans Converted to Term Loans	16
Unallocated	0
Loans, amortized cost	1,257	0
Other C&I | Nonperforming
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	0
Year Two	0
Year Three	0
Year Four	2
Year Five	0
Prior	1
Revolving Loans	1
Revolving Loans Converted to Term Loans	0
Unallocated	0
Loans, amortized cost	4
Other C&I | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	181
Year Two	175
Year Three	82
Year Four	86
Year Five	28
Prior	301
Revolving Loans	350
Revolving Loans Converted to Term Loans	11
Unallocated	0
Loans, amortized cost	1,214
Other C&I | Criticized
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	5
Year Two	6
Year Three	6
Year Four	7
Year Five	2
Prior	0
Revolving Loans	8
Revolving Loans Converted to Term Loans	5
Unallocated	0
Loans, amortized cost	39
PPP
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	250	1,559
Year Two	81	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
Loans, amortized cost	331	1,559
PPP | Nonperforming
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	2	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
Loans, amortized cost	2	0
PPP | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	226	1,456
Year Two	72	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
Loans, amortized cost	298	1,456
PPP | Criticized
Accounts, Notes, Loans and Financing Receivable [Line Items]
Year One	22	103
Year Two	9	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
Loans, amortized cost	$ 31	$ 103