| Document and Entity Information | Jun. 17, 2020 |
| Document And Entity Information [Line Items] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001338065 |
| Document Type | 8-K |
| Document Period End Date | Jun. 17, 2020 |
| Entity Registrant Name | DCP MIDSTREAM, LP |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-32678 |
| Entity Tax Identification Number | 03-0567133 |
| Entity Address, Address Line One | 370 17th Street |
| Entity Address, Address Line Two | Suite 2500 |
| Entity Address, City or Town | Denver |
| Entity Address, State or Province | CO |
| Entity Address, Postal Zip Code | 80202 |
| City Area Code | (303) |
| Local Phone Number | 595-3331 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Capital Units [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Common units representing limited partner interests |
| Trading Symbol | DCP |
| Security Exchange Name | NYSE |
| Series B Preferred Stock [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | 7.875% Series B Fixed-to-Floating Rate Cumulative Redeemable Perpetual Preferred Units |
| Trading Symbol | DCP PRB |
| Security Exchange Name | NYSE |
| Series C Preferred Stock [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | 7.95% Series C Fixed-to-Floating Rate Cumulative Redeemable Perpetual Preferred Units |
| Trading Symbol | DCP PRC |
| Security Exchange Name | NYSE |
