| Document and Entity Information | Dec. 07, 2021 |
| Entity Information [Line Items] | |
| Document Type | 8-K/A |
| Document Period End Date | Dec. 7, 2021 |
| Entity Registrant Name | Planet Labs PBC |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-40166 |
| Entity Tax Identification Number | 85-4299396 |
| Entity Address, Address Line One | 645 Harrison Street |
| Entity Address, Address Line Two | Floor 4 |
| Entity Address, City or Town | San Francisco |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 94107 |
| City Area Code | 415 |
| Local Phone Number | 829-3313 |
| Entity Information, Former Legal or Registered Name | dMY Technology Group, Inc. IV |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Current Fiscal Year End Date | --12-31 |
| Amendment Flag | false |
| Entity Central Index Key | 0001836833 |
| Former Address [Member] | |
| Entity Information [Line Items] | |
| Entity Address, Address Line One | 1180 North Town Center Drive |
| Entity Address, Address Line Two | Suite 100 |
| Entity Address, City or Town | Las Vegas |
| Entity Address, State or Province | NV |
| Entity Address, Postal Zip Code | 89144 |
| Common Class A [Member] | |
| Entity Information [Line Items] | |
| Title of 12(b) Security | Class A common stock, $0.0001 par value per share |
| Trading Symbol | PL |
| Security Exchange Name | NYSE |
| Warrant [Member] | |
| Entity Information [Line Items] | |
| Title of 12(b) Security | Warrants to purchase Class A common stock, at an exercise price of $11.50 per share |
| Trading Symbol | PL WS |
| Security Exchange Name | NYSE |
