Noninterest Income - Disaggregation of Revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 1,503	$ 1,314	$ 1,057
Revenue not from contracts with customer	225	1,424	783
Noninterest income	1,728	2,738	1,840
Other Items
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	6	5	3
Revenue not from contracts with customer	124	874	505
Noninterest income	130	879	508
Silicon Valley Bank
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	829	640	525
Revenue not from contracts with customer	278	66	79
Noninterest income	1,107	706	604
SVB Private
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	87	51	5
Revenue not from contracts with customer	9	7	0
Noninterest income	96	58	5
SVB Capital
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	58	75	36
Revenue not from contracts with customer	(168)	412	190
Noninterest income	(110)	487	226
SVB Securities
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	523	543	488
Revenue not from contracts with customer	(18)	65	9
Noninterest income	505	608	497
Client investment fees
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	386	75	132
Client investment fees | Other Items
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	2	0	0
Client investment fees | Silicon Valley Bank
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	384	73	129
Client investment fees | SVB Private
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	2	3
Client investment fees | SVB Capital
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0
Client investment fees | SVB Securities
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0
Wealth management and trust fees
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	83	44	0
Wealth management and trust fees | Other Items
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0
Wealth management and trust fees | Silicon Valley Bank
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0
Wealth management and trust fees | SVB Private
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	83	44
Wealth management and trust fees | SVB Capital
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0
Wealth management and trust fees | SVB Securities
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0
Card interchange fees, gross
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	227	201	130
Card interchange fees, gross | Other Items
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	3	2	2
Card interchange fees, gross | Silicon Valley Bank
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	223	198	127
Card interchange fees, gross | SVB Private
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1	1	1
Card interchange fees, gross | SVB Capital
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0
Card interchange fees, gross | SVB Securities
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0
Merchant service fees
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	26	18	18
Merchant service fees | Other Items
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0
Merchant service fees | Silicon Valley Bank
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	25	17	17
Merchant service fees | SVB Private
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1	1	1
Merchant service fees | SVB Capital
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0
Merchant service fees | SVB Securities
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0
Deposit service charges
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	126	112	90
Deposit service charges | Other Items
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1	2	0
Deposit service charges | Silicon Valley Bank
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	124	109	90
Deposit service charges | SVB Private
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1	1	0
Deposit service charges | SVB Capital
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0
Deposit service charges | SVB Securities
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0
Investment banking revenue
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	420	459	414
Investment banking revenue | Other Items
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0
Investment banking revenue | Silicon Valley Bank
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0
Investment banking revenue | SVB Private
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0
Investment banking revenue | SVB Capital
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0
Investment banking revenue | SVB Securities
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	420	459	414
Commissions
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	98	79	67
Commissions | Other Items
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0
Commissions | Silicon Valley Bank
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0
Commissions | SVB Private
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0
Commissions | SVB Capital
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0
Commissions | SVB Securities
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	98	79	67
Fund management fees
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	59	67	39
Fund management fees | Other Items
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0
Fund management fees | Silicon Valley Bank
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	2	0	0
Fund management fees | SVB Private
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0
Fund management fees | SVB Capital
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	52	62	32
Fund management fees | SVB Securities
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	5	5	7
Other
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	78	259	167
Other | Other Items
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	1	1
Other | Silicon Valley Bank
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	71	243	162
Other | SVB Private
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1	2	0
Other | SVB Capital
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	6	13	4
Other | SVB Securities
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 0	$ 0	$ 0