v3.5.0.2
Organization and Basis of Presentation, Acquisition and Merger Agreement (Details) - Alaska Logistics Assets [Domain]
$ in Millions
3 Months Ended
Mar. 31, 2016
USD ($)
Acquisition  
Business Combination, Consideration Transferred $ 444
Phase One [Member]  
Acquisition  
Business Combination, Consideration Transferred 266
Payments to Acquire Businesses, Gross 240
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned 26
Phase Two [Member]  
Acquisition  
Business Combination, Consideration Transferred 178
Payments to Acquire Businesses, Gross 160
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned $ 18