Segment Reporting - Segment Information (Additional Information) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Segment Reporting Information [Line Items]
Goodwill	$ 375		$ 375		$ 375
Operating segments | Silicon Valley Bank
Segment Reporting Information [Line Items]
Depreciation and amortization	12	$ 8	21	$ 14
Operating segments | SVB Securities
Segment Reporting Information [Line Items]
Goodwill	174	$ 138	174	$ 138
Operating segments | Private bank
Segment Reporting Information [Line Items]
Goodwill	$ 201		$ 201