| Document and Entity Information | May 18, 2020 |
| Cover [Abstract] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001328237 |
| Document Type | 8-K |
| Document Period End Date | May 18, 2020 |
| Entity Registrant Name | INVESCO DB COMMODITY INDEX TRACKING FUND |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-32726 |
| Entity Tax Identification Number | 32-6042243 |
| Entity Address, Address Line One | c/o Invesco Capital Management LLC |
| Entity Address, Address Line Two | 3500 Lacey Road |
| Entity Address, Address Line Three | Suite 700 |
| Entity Address, City or Town | Downers Grove |
| Entity Address, State or Province | IL |
| Entity Address, Postal Zip Code | 60515 |
| City Area Code | (800) |
| Local Phone Number | 983-0903 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Units of Beneficial Interest |
| Trading Symbol | DBC |
| Security Exchange Name | NYSEArca |
| Entity Emerging Growth Company | false |
