| Document and Entity Information | May 01, 2020 |
| Entity Information [Line Items] | |
| Entity Registrant Name | SVB Financial Group |
| Document Type | 8-K/A |
| Document Period End Date | May 1, 2020 |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 000-15637 |
| Entity Tax Identification Number | 91-1962278 |
| Entity Address, Address Line One | 3003 Tasman Drive |
| Entity Address, City or Town | Santa Clara |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 95054-1191 |
| City Area Code | 408 |
| Local Phone Number | 654-7400 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0000719739 |
| Amendment Flag | true |
| Amendment Description | This Amendment No. 1 to Current Report on Form 8-K/A (this "amendment") amends SVB Financial Group's Current Report on Form 8-K originally filed with the Securities and Exchange Commission on May 1, 2020 (the "original filing"). The sole purpose of this amendment is to add Inline eXtensible Business Reporting Language tagging to the cover page of this Form 8-K/A. No other changes have been made to the original filing. |
| Common Stock | |
| Entity Information [Line Items] | |
| Title of 12(b) Security | Common Stock, par value $0.001 per share |
| Trading Symbol | SIVB |
| Security Exchange Name | NASDAQ |
| Preferred Stock, Series A | |
| Entity Information [Line Items] | |
| Title of 12(b) Security | Depositary shares, each representing a 1/40th interest in a share of 5.250% Fixed-Rate Non-Cumulative Perpetual Preferred Stock, Series A |
| Trading Symbol | SIVBP |
| Security Exchange Name | NASDAQ |
