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Segment Reporting - Segment Information (Additional Information) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 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	13	$ 10	34	$ 25
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	$ 201	$ 201

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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