Noninterest Income - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 350	$ 315	$ 1,070	$ 948
Revenues outside the scope of ASC 606	9	357	168	1,229
Noninterest income (loss)	359	672	1,238	2,177
Other Items
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	1	4	3
Revenues outside the scope of ASC 606	(17)	188	107	793
Noninterest income (loss)	(17)	189	111	796
Silicon Valley Bank
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	214	165	586	463
Revenues outside the scope of ASC 606	94	17	195	51
Noninterest income (loss)	308	182	781	514
SVB Private
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	20	23	66	26
Revenues outside the scope of ASC 606	2	2	6	2
Noninterest income (loss)	22	25	72	28
SVB Capital
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	15	18	43	59
Revenues outside the scope of ASC 606	(69)	127	(121)	330
Noninterest income (loss)	(54)	145	(78)	389
SVB Securities
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	101	108	371	397
Revenues outside the scope of ASC 606	(1)	23	(19)	53
Noninterest income (loss)	100	131	352	450
Investment banking revenue
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	119	20	237	55
Investment banking revenue | Other Items
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	1	0
Investment banking revenue | Silicon Valley Bank
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	119	20	236	53
Investment banking revenue | SVB Private
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	2
Investment banking revenue | SVB Capital
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Investment banking revenue | SVB Securities
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Wealth management and trust fees
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	19	22	63	22
Wealth management and trust fees | Other Items
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0		0	0
Wealth management and trust fees | Silicon Valley Bank
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Wealth management and trust fees | SVB Private
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	19	22	63	22
Wealth management and trust fees | SVB Capital
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0		0	0
Wealth management and trust fees | SVB Securities
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0		0	0
Spot contract commissions
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	74	65	215	188
Card interchange fees, gross
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	55	52	173	142
Card interchange fees, gross | Other Items
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	2	1
Card interchange fees, gross | Silicon Valley Bank
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	54	52	170	140
Card interchange fees, gross | SVB Private
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1	0	1	1
Card interchange fees, gross | SVB Capital
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Card interchange fees, gross | SVB Securities
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Merchant service fees
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	7	4	18	12
Merchant service fees | Other Items
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Merchant service fees | Silicon Valley Bank
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	7	4	18	12
Merchant service fees | SVB Private
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Merchant service fees | SVB Capital
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Merchant service fees | SVB Securities
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Deposit service charges
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	32	29	94	82
Deposit service charges | Other Items
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	1	1	2
Deposit service charges | Silicon Valley Bank
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	32	28	92	80
Deposit service charges | SVB Private
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	1	0
Deposit service charges | SVB Capital
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Deposit service charges | SVB Securities
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Investment banking revenue
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	75	90	293	335
Investment banking revenue | Other Items
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Investment banking revenue | Silicon Valley Bank
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Investment banking revenue | SVB Private
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Investment banking revenue | SVB Capital
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Investment banking revenue | SVB Securities
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	75	90	293	335
Commissions
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	24	17	73	58
Commissions | Other Items
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Commissions | Silicon Valley Bank
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Commissions | SVB Private
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Commissions | SVB Capital
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Commissions | SVB Securities
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	24	17	73	58
Fund management fees
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	16	15	43	51
Fund management fees | Other Items
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Fund management fees | Silicon Valley Bank
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1	0	1	0
Fund management fees | SVB Private
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Fund management fees | SVB Capital
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	13	14	37	47
Fund management fees | SVB Securities
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	2	1	5	4
Other
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	3	66	76	191
Other | Other Items
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Other | Silicon Valley Bank
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1	61	69	178
Other | SVB Private
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	1	1	1
Other | SVB Capital
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	2	4	6	12
Other | SVB Securities
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 0	$ 0	$ 0	$ 0