Document And Entity Information - shares |
9 Months Ended | |
|---|---|---|
Sep. 30, 2016 |
Oct. 31, 2016 |
|
| Document Information [Line Items] | ||
| Document Type | 10-Q | |
| Amendment Flag | false | |
| Document Period End Date | Sep. 30, 2016 | |
| Document Fiscal Year Focus | 2016 | |
| Document Fiscal Period Focus | Q3 | |
| Entity Registrant Name | COLUMBIA PIPELINE PARTNERS LP/DE | |
| Entity Central Index Key | 0001420783 | |
| Current Fiscal Year End Date | --12-31 | |
| Entity Filer Category | Large Accelerated Filer | |
| Common Units | ||
| Document Information [Line Items] | ||
| Entity Units Outstanding | 53,843,466 | |
| Subordinated Units | ||
| Document Information [Line Items] | ||
| Entity Units Outstanding | 46,811,398 |