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	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Receivables [Abstract]
Increase (decrease) in allowance for credit loss	$ (26)
Financing Receivable, Impaired [Line Items]
Allowance for credit loss, beginning balance	448	$ 305	$ 282
Charge-offs	(138)	(103)	(93)
Recoveries	24	29	21
Provision (Reduction) for Loans	66	189	94
Foreign Currency Translation Adjustments		3	1
Allowance for credit loss, ending balance	422	448	305
Initial Allowance on PCD Loans
Financing Receivable, Impaired [Line Items]
Allowance for credit loss, beginning balance	22	25
Allowance for credit loss, ending balance		22	25
Global fund banking
Financing Receivable, Impaired [Line Items]
Allowance for credit loss, beginning balance	46	107	94
Charge-offs	(80)	0	(2)
Recoveries	0	0	2
Provision (Reduction) for Loans	101	9	13
Foreign Currency Translation Adjustments		0	0
Allowance for credit loss, ending balance	67	46	107
Global fund banking | Initial Allowance on PCD Loans
Financing Receivable, Impaired [Line Items]
Allowance for credit loss, beginning balance	0	(70)
Allowance for credit loss, ending balance		0	(70)
Investor dependent
Financing Receivable, Impaired [Line Items]
Allowance for credit loss, beginning balance	213	82	72
Charge-offs	(46)	(89)	(85)
Recoveries	18	25	14
Provision (Reduction) for Loans	(39)	125	81
Foreign Currency Translation Adjustments		(2)	0
Allowance for credit loss, ending balance	146	213	82
Investor dependent | Non-PCD loan
Financing Receivable, Impaired [Line Items]
Provision (Reduction) for Loans	44
Investor dependent | Initial Allowance on PCD Loans
Financing Receivable, Impaired [Line Items]
Allowance for credit loss, beginning balance	0	72
Allowance for credit loss, ending balance		0	72
Cash flow dependent and innovation C&I (Commercial and Industrial)
Financing Receivable, Impaired [Line Items]
Allowance for credit loss, beginning balance	125	81	88
Charge-offs	(8)	(11)	(3)
Recoveries	6	3	5
Provision (Reduction) for Loans	(5)	53	(9)
Foreign Currency Translation Adjustments		0	0
Allowance for credit loss, ending balance	118	125	81
Cash flow dependent and innovation C&I (Commercial and Industrial) | Initial Allowance on PCD Loans
Financing Receivable, Impaired [Line Items]
Allowance for credit loss, beginning balance	0	(1)
Allowance for credit loss, ending balance		0	(1)
Private Bank
Financing Receivable, Impaired [Line Items]
Allowance for credit loss, beginning balance	53	22	21
Charge-offs	(3)	(2)	(1)
Recoveries	0	0	0
Provision (Reduction) for Loans	(18)	21	2
Foreign Currency Translation Adjustments		0	0
Allowance for credit loss, ending balance	33	53	22
Private Bank | Initial Allowance on PCD Loans
Financing Receivable, Impaired [Line Items]
Allowance for credit loss, beginning balance	1	12
Allowance for credit loss, ending balance		1	12
CRE
Financing Receivable, Impaired [Line Items]
Allowance for credit loss, beginning balance	0
Charge-offs	0
Recoveries	0
Provision (Reduction) for Loans	19
Allowance for credit loss, ending balance	36	0
CRE | Initial Allowance on PCD Loans
Financing Receivable, Impaired [Line Items]
Allowance for credit loss, beginning balance	17
Allowance for credit loss, ending balance		17
Other C&I
Financing Receivable, Impaired [Line Items]
Allowance for credit loss, beginning balance	0
Charge-offs	0
Recoveries	0
Provision (Reduction) for Loans	10
Allowance for credit loss, ending balance	14	0
Other C&I | Initial Allowance on PCD Loans
Financing Receivable, Impaired [Line Items]
Allowance for credit loss, beginning balance	4
Allowance for credit loss, ending balance		4
Premium wine and other
Financing Receivable, Impaired [Line Items]
Allowance for credit loss, beginning balance	9	13	7
Charge-offs	(1)	(1)	(2)
Recoveries	0	1	0
Provision (Reduction) for Loans	0	(21)	7
Foreign Currency Translation Adjustments		5	1
Allowance for credit loss, ending balance	8	9	13
Premium wine and other | Initial Allowance on PCD Loans
Financing Receivable, Impaired [Line Items]
Allowance for credit loss, beginning balance	0	12
Allowance for credit loss, ending balance		0	12
PPP
Financing Receivable, Impaired [Line Items]
Allowance for credit loss, beginning balance	2	0
Charge-offs	0	0
Recoveries	0	0
Provision (Reduction) for Loans	(2)	2
Foreign Currency Translation Adjustments		0
Allowance for credit loss, ending balance	0	2	0
PPP | Initial Allowance on PCD Loans
Financing Receivable, Impaired [Line Items]
Allowance for credit loss, beginning balance	$ 0	0
Allowance for credit loss, ending balance		$ 0	$ 0