Equity (Details 2) - USD ($) $ / shares in Units, $ in Millions		1 Months Ended	3 Months Ended
	Aug. 01, 2015	Jul. 31, 2015	Jun. 30, 2015
Distributions
Total Quarterly Distribution per Unit (in dollars per unit)			$ 0.337500
Total distributions			$ 73.1
Distribution received from TLP			$ 4.0
TLP
Distributions
Total Quarterly Distribution per Unit (in dollars per unit)			$ 0.40
Distribution declared per unit (in dollars per unit)			0.665
Amount per unit (in dollars per unit)	$ 0.6650		$ 0.665
Amount Paid to Limited Partner			$ 8.6
Subsequent event
Distributions
Distribution declared per unit (in dollars per unit)		$ 0.6325
Distribution received from TLP		$ 4.0
Amount of distribution declared		$ 81.7
Subsequent event | TLP
Distributions
Distribution declared per unit (in dollars per unit)		$ 0.6650
Amount Paid to Limited Partner		$ 8.6
First target distribution | Minimum
Distributions
Total Quarterly Distribution per Unit (in dollars per unit)			$ 0.337500
First target distribution | Minimum | TLP
Distributions
Total Quarterly Distribution per Unit (in dollars per unit)			0.40
First target distribution | Maximum
Distributions
Total Quarterly Distribution per Unit (in dollars per unit)			0.388125
First target distribution | Maximum | TLP
Distributions
Total Quarterly Distribution per Unit (in dollars per unit)			0.44
Second target distribution | Minimum
Distributions
Total Quarterly Distribution per Unit (in dollars per unit)			0.388125
Second target distribution | Minimum | TLP
Distributions
Total Quarterly Distribution per Unit (in dollars per unit)			0.44
Second target distribution | Maximum
Distributions
Total Quarterly Distribution per Unit (in dollars per unit)			0.421875
Second target distribution | Maximum | TLP
Distributions
Total Quarterly Distribution per Unit (in dollars per unit)			0.50
Third target distribution | Minimum
Distributions
Total Quarterly Distribution per Unit (in dollars per unit)			0.421875
Third target distribution | Minimum | TLP
Distributions
Total Quarterly Distribution per Unit (in dollars per unit)			0.50
Third target distribution | Maximum
Distributions
Total Quarterly Distribution per Unit (in dollars per unit)			0.506250
Third target distribution | Maximum | TLP
Distributions
Total Quarterly Distribution per Unit (in dollars per unit)			0.60
Thereafter
Distributions
Total Quarterly Distribution per Unit (in dollars per unit)			0.506250
Thereafter | TLP
Distributions
Total Quarterly Distribution per Unit (in dollars per unit)			$ 0.60
Limited Partner
Distributions
Marginal Percentage Interest In Distributions			99.90%
Limited Partner | TLP
Distributions
Marginal Percentage Interest In Distributions			98.00%
Limited Partner | Common Units
Distributions
Total distributions (in dollars per unit)			$ 0.6250
Limited Partner | First target distribution
Distributions
Marginal Percentage Interest In Distributions			99.90%
Limited Partner | First target distribution | TLP
Distributions
Marginal Percentage Interest In Distributions			98.00%
Limited Partner | Second target distribution
Distributions
Marginal Percentage Interest In Distributions			86.90%
Limited Partner | Second target distribution | TLP
Distributions
Marginal Percentage Interest In Distributions			85.00%
Limited Partner | Third target distribution
Distributions
Marginal Percentage Interest In Distributions			76.90%
Limited Partner | Third target distribution | TLP
Distributions
Marginal Percentage Interest In Distributions			75.00%
Limited Partner | Thereafter
Distributions
Marginal Percentage Interest In Distributions			51.90%
Limited Partner | Thereafter | TLP
Distributions
Marginal Percentage Interest In Distributions			50.00%
General Partner
Distributions
Marginal Percentage Interest In Distributions			0.10%
Incentive distribution to general partner			$ 13.4
General Partner | TLP
Distributions
Marginal Percentage Interest In Distributions			2.00%
General Partner | First target distribution
Distributions
Marginal Percentage Interest In Distributions			0.10%
General Partner | First target distribution | TLP
Distributions
Marginal Percentage Interest In Distributions			2.00%
General Partner | Second target distribution
Distributions
Marginal Percentage Interest In Distributions			13.10%
General Partner | Second target distribution | TLP
Distributions
Marginal Percentage Interest In Distributions			15.00%
General Partner | Third target distribution
Distributions
Marginal Percentage Interest In Distributions			23.10%
General Partner | Third target distribution | TLP
Distributions
Marginal Percentage Interest In Distributions			25.00%
General Partner | Thereafter
Distributions
Marginal Percentage Interest In Distributions			48.10%
General Partner | Thereafter | TLP
Distributions
Marginal Percentage Interest In Distributions			50.00%