Related Party Transactions (CCP) (Narrative) (Details) - Cross Country Pipeline [Member] - Immediate Family Member of Management or Principal Owner [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cost Method Investment [Member]
Related Party Transaction [Line Items]
Cost method investment, original cost	$ 15.0
Lease and Rental Agreements [Member] | Equipment [Member]
Related Party Transaction [Line Items]
Expenses from transactions with related party	10.6	$ 6.3	$ 1.3
Payables, related party	$ 0.6	$ 1.3