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Statements Of Consolidated and Combined Equity and Partners' Capital Statement of Consolidated and Combined Equity and Partners' Capital (Parenthetical) (USD $)
In Millions, unless otherwise specified |
2 Months Ended |
|---|---|
|
Mar. 31, 2015
|
|
| Net proceeds from IPO | $ 1,168.4 |
| Limited Partner [Member] | |
| Net proceeds from IPO | $ 1,168.4 |
| Columbia OpCo | |
| Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Ownership Interest Additional Ownership Interest | 8.40% |
| Hardy Storage [Member] | |
| Equity Method Investment, Percent Not Contributed to Partnership | 1.00% |
| Equity Method Investment, Ownership Percentage | 50.00% |