Initial Public Offering (Schedule of Change From Net Income Attributable to the Partnership and Transfers to Noncontrolling Interest) (Details) - USD ($) $ in Millions |
2 Months Ended | 3 Months Ended |
|---|---|---|
Mar. 31, 2015 |
Mar. 31, 2016 |
|
| Initial Public Offering [Line Items] | ||
| Net Income (Loss) Allocated to Limited Partners | $ 13.3 | $ 27.3 |
| Noncontrolling Interest, Increase from Subsidiary Equity Issuance | 0.0 | |
| Change from net income attributable to the Partnership and transfers to noncontrolling interest | (411.1) | 27.3 |
| Noncontrolling Interest | ||
| Initial Public Offering [Line Items] | ||
| Noncontrolling Interest, Increase from Subsidiary Equity Issuance | $ (424.4) | $ 0.0 |