| Document and Entity Information | May 28, 2020 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | May 28, 2020 |
| Entity Registrant Name | salesforce.com, inc. |
| Entity Central Index Key | 0001108524 |
| Amendment Flag | false |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-32224 |
| Entity Tax Identification Number | 94-3320693 |
| Entity Address, Address Line One | Salesforce Tower |
| Entity Address, Address Line Two | 415 Mission Street, 3rd Fl |
| Entity Address, City or Town | San Francisco |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 94105 |
| City Area Code | 415 |
| Local Phone Number | 901-7000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, par value $0.001 per share |
| Trading Symbol | CRM |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
