Regulatory Matters - Capital Ratios for Company and Bank under Federal Regulatory Guidelines (Details) $ in Millions	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
SVB Financial Group
CET 1 risk-based capital, Actual Capital Ratios	0.1205	0.1209
CET 1 risk-based capital, Required Capital Ratios	7.00%	7.00%
CET 1 risk-based capital, Actual Capital Amounts	$ 13,697	$ 12,186
CET 1 risk-based capital, Required Capital Amounts	$ 7,954	$ 7,057
Tier 1 risk-based capital, Actual Capital Ratios	0.1540	0.1608
Tier 1 risk-based capital, Required Capital Ratios	0.085	0.085
Tier 1 risk-based capital, Well Capitalized Capital Ratios	0.060	0.060
Tier 1 risk-based capital, Actual Capital Amounts	$ 17,504	$ 16,206
Tier 1 risk-based capital, Required Capital Amounts	9,658	8,569
Tier 1 risk-based capital, Well Capitalized Capital Amounts	$ 6,818	$ 6,049
Total risk-based capital, Actual Capital Ratios	0.1618	0.1658
Total risk-based capital, Required Capital Ratios	0.105	0.105
Total risk-based capital, Well Capitalized Capital Ratios	0.100	0.100
Total risk-based capital, Actual Capital Amounts	$ 18,380	$ 16,712
Total risk-based capital, Required Capital Amounts	11,931	10,585
Total risk-based capital, Well Capitalized Capital Amounts	$ 11,363	$ 10,081
Tier 1 leverage, Actual Capital Ratios	0.0811	0.0793
Tier 1 leverage, Required Capital Ratios	0.040	0.040
Tier 1 leverage, Actual Capital Amounts	$ 17,504	$ 16,206
Tier 1 leverage, Required Capital Amounts	$ 8,630	$ 8,175
Silicon Valley Bank
CET 1 risk-based capital, Actual Capital Ratios	0.1526	0.1489
CET 1 risk-based capital, Required Capital Ratios	7.00%	7.00%
CET 1 risk-based capital, Well Capitalized Capital Ratios	6.50%	6.50%
CET 1 risk-based capital, Actual Capital Amounts	$ 16,995	$ 14,622
CET 1 risk-based capital, Required Capital Amounts	7,795	6,875
CET 1 risk-based capital, Well Capitalized Capital Amounts	$ 7,238	$ 6,384
Tier 1 risk-based capital, Actual Capital Ratios	0.1526	0.1489
Tier 1 risk-based capital, Required Capital Ratios	0.085	0.085
Tier 1 risk-based capital, Well Capitalized Capital Ratios	0.080	0.080
Tier 1 risk-based capital, Actual Capital Amounts	$ 16,995	$ 14,622
Tier 1 risk-based capital, Required Capital Amounts	9,465	8,348
Tier 1 risk-based capital, Well Capitalized Capital Amounts	$ 8,908	$ 7,857
Total risk-based capital, Actual Capital Ratios	0.1605	0.1540
Total risk-based capital, Required Capital Ratios	0.105	0.105
Total risk-based capital, Well Capitalized Capital Ratios	0.100	0.100
Total risk-based capital, Actual Capital Amounts	$ 17,871	$ 15,129
Total risk-based capital, Required Capital Amounts	11,692	10,313
Total risk-based capital, Well Capitalized Capital Amounts	$ 11,135	$ 9,821
Tier 1 leverage, Actual Capital Ratios	0.0796	0.0724
Tier 1 leverage, Required Capital Ratios	0.040	0.040
Tier 1 leverage, Well Capitalized Capital Ratios	0.050	0.050
Tier 1 leverage, Actual Capital Amounts	$ 16,995	$ 14,622
Tier 1 leverage, Required Capital Amounts	8,537	8,075
Tier 1 leverage, Well Capitalized Capital Amounts	$ 10,672	$ 10,094

Common Equity Tier One Capital Required For Capital Adequacy To Risk Weighted Assets

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Common Equity Tier One Capital Required To Be Well Capitalized To Risk Weighted Assets

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Tier One Risk Based Capital Required For Capital Adequacy With Buffer

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Amount of total capital as defined by regulatory framework.

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