Loans and Allowance for Credit Losses: Loans and Unfunded Credit Commitments - Activity Relating to our Allowance for Credit Losses for Loans (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Financing Receivable, Allowance for Credit Loss [Line Items]
Change in allowance for credit loss	$ (1)
Accrued interest receivable	181		$ 171
Allowance for credit loss, beginning balance	422	$ 448
Charge-offs	(18)	(95)
Recoveries	10	5
(Reduction) Provision for Credit Losses	8	34
Foreign Currency Translation Adjustments	(1)
Allowance for credit loss, ending balance	421	392
Global fund banking
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit loss, beginning balance	67	46
Charge-offs	0	(80)
Recoveries	0	0
(Reduction) Provision for Credit Losses	(1)	94
Foreign Currency Translation Adjustments	0
Allowance for credit loss, ending balance	66	60
Investor dependent
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit loss, beginning balance	146	213
Charge-offs	(17)	(14)
Recoveries	8	5
(Reduction) Provision for Credit Losses	11	(36)
Foreign Currency Translation Adjustments	0
Allowance for credit loss, ending balance	148	168
Cash flow dependent and innovation C&I (Commercial and Industrial)
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit loss, beginning balance	118	125
Charge-offs	0	0
Recoveries	0	0
(Reduction) Provision for Credit Losses	(3)	(13)
Foreign Currency Translation Adjustments	0
Allowance for credit loss, ending balance	115	112
Private bank
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit loss, beginning balance	33	53
Charge-offs	0	0
Recoveries	2	0
(Reduction) Provision for Credit Losses	2	(9)
Foreign Currency Translation Adjustments	0
Allowance for credit loss, ending balance	37	44
CRE
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit loss, beginning balance	36
Charge-offs	0
Recoveries	0
(Reduction) Provision for Credit Losses	(2)
Foreign Currency Translation Adjustments	0
Allowance for credit loss, ending balance	34
Other C&I
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit loss, beginning balance	14
Charge-offs	(1)
Recoveries	0
(Reduction) Provision for Credit Losses	(1)
Foreign Currency Translation Adjustments	0
Allowance for credit loss, ending balance	12
Premium wine and other
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit loss, beginning balance	8	9
Charge-offs	0	(1)
Recoveries	0	0
(Reduction) Provision for Credit Losses	2	0
Foreign Currency Translation Adjustments	(1)
Allowance for credit loss, ending balance	$ 9	8
PPP Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit loss, beginning balance		2
Charge-offs		0
Recoveries		0
(Reduction) Provision for Credit Losses		(2)
Allowance for credit loss, ending balance		$ 0