Noninterest Income - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 352	$ 327
Revenues outside the scope of ASC 606	165	417
Noninterest income	517	744
Other Items
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1	0
Revenues outside the scope of ASC 606	93	345
Noninterest income	94	345
Silicon Valley Bank
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	192	145
Revenues outside the scope of ASC 606	20	14
Noninterest income	212	159
SVB Private
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	24	1
Revenues outside the scope of ASC 606	1	0
Noninterest income	25	1
SVB Capital
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	16	13
Revenues outside the scope of ASC 606	49	56
Noninterest income	65	69
SVB Securities
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	119	168
Revenues outside the scope of ASC 606	2	2
Noninterest income	121	170
Investment banking revenue
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	35	20
Investment banking revenue | Other Items
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0
Investment banking revenue | Silicon Valley Bank
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	35	19
Investment banking revenue | SVB Private
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	1
Investment banking revenue | SVB Capital
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0
Investment banking revenue | SVB Securities
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0
Wealth management and trust fees
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	22
Wealth management and trust fees | Other Items
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0
Wealth management and trust fees | Silicon Valley Bank
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0
Wealth management and trust fees | SVB Private
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	22
Wealth management and trust fees | SVB Capital
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0
Wealth management and trust fees | SVB Securities
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0
Spot contract commissions
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	66	55
Spot contract commissions | Other Items
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0
Spot contract commissions | Silicon Valley Bank
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	65	55
Spot contract commissions | SVB Private
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1	0
Spot contract commissions | SVB Capital
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0
Spot contract commissions | 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	57	41
Card interchange fees, gross | Other Items
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1	0
Card interchange fees, gross | Silicon Valley Bank
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	56	41
Card interchange fees, gross | SVB Private
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0
Card interchange fees, gross | SVB Capital
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0
Card interchange fees, gross | SVB Securities
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0
Merchant service fees
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	5	4
Merchant service fees | Other Items
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0
Merchant service fees | Silicon Valley Bank
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	5	4
Merchant service fees | SVB Private
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0
Merchant service fees | SVB Capital
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0
Merchant service fees | SVB Securities
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0
Deposit service charges
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	30	25
Deposit service charges | Other Items
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0
Deposit service charges | Silicon Valley Bank
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	29	25
Deposit service charges | SVB Private
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1	0
Deposit service charges | SVB Capital
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0
Deposit service charges | SVB Securities
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0
Investment banking revenue
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	93	142
Investment banking revenue | Other Items
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0
Investment banking revenue | Silicon Valley Bank
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0
Investment banking revenue | SVB Private
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0
Investment banking revenue | SVB Capital
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0
Investment banking revenue | SVB Securities
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	93	142
Commissions
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	25	24
Commissions | Other Items
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0
Commissions | Silicon Valley Bank
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0
Commissions | SVB Private
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0
Commissions | SVB Capital
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0
Commissions | SVB Securities
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	25	24
Fund management fees
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	13	15
Fund management fees | Other Items
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0
Fund management fees | Silicon Valley Bank
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0
Fund management fees | SVB Private
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0
Fund management fees | SVB Capital
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	12	13
Fund management fees | SVB Securities
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1	2
Performance fees
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	4	0
Performance fees | Other Items
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0
Performance fees | Silicon Valley Bank
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0
Performance fees | SVB Private
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0
Performance fees | SVB Capital
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	4	0
Performance fees | SVB Securities
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0
Correspondent bank rebates
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	2	1
Correspondent bank rebates | Other Items
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0
Correspondent bank rebates | Silicon Valley Bank
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	2	1
Correspondent bank rebates | SVB Private
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0
Correspondent bank rebates | SVB Capital
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0
Correspondent bank rebates | SVB Securities
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 0	$ 0