Net Income Per Limited Partner Unit (Schedule of Net Income In Excess Of Distribution) (Details) (USD $)
In Millions, unless otherwise specified
2 Months Ended
Mar. 31, 2015
Schedule of Undistributed Net Income [Line Items]  
Net Income (Loss) Allocated to Limited Partners $ 13.3
Incentive Distribution, Distribution 0
Undistributed Earnings, Basic 13.3
Common Units [Member]  
Schedule of Undistributed Net Income [Line Items]  
Net Income (Loss) Allocated to Limited Partners 7.1
Distribution Made to Limited Partner, Cash Distributions Declared 0
Undistributed Earnings, Basic 7.1
Subordinated Units [Member]  
Schedule of Undistributed Net Income [Line Items]  
Net Income (Loss) Allocated to Limited Partners 6.2
Distribution Made to Limited Partner, Cash Distributions Declared 0
Undistributed Earnings, Basic $ 6.2