Document And Entity Information - shares |
6 Months Ended | |
|---|---|---|
Jun. 30, 2015 |
Jul. 27, 2015 |
|
| Document Information [Line Items] | ||
| Document Type | 10-Q | |
| Amendment Flag | false | |
| Document Period End Date | Jun. 30, 2015 | |
| Document Fiscal Year Focus | 2015 | |
| Document Fiscal Period Focus | Q2 | |
| Entity Registrant Name | COLUMBIA PIPELINE PARTNERS LP/DE | |
| Entity Central Index Key | 0001420783 | |
| Current Fiscal Year End Date | --12-31 | |
| Entity Filer Category | Non-accelerated Filer | |
| Common Units [Member] | ||
| Document Information [Line Items] | ||
| Entity Units Outstanding | 53,834,784 | |
| Subordinated Units [Member] | ||
| Document Information [Line Items] | ||
| Entity Units Outstanding | 46,811,398 |