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Operating Segments - Segment Financial Data (Details)
$ in Millions
3 Months Ended
Mar. 31, 2017
USD ($)
segment
Mar. 31, 2016
USD ($)
Segment Reporting Information [Line Items]    
Operating segments number | segment 3  
Revenues:    
Revenues $ 6,667 $ 4,111
Segment Reporting, Disclosure of Other Information about Entity's Reportable Segments    
Equity earnings in unconsolidated entities 53 47
Segment adjusted EBITDA 512 632
Maintenance capital 59 47
Transportation    
Revenues:    
Revenues 225 241
Segment Reporting, Disclosure of Other Information about Entity's Reportable Segments    
Equity earnings in unconsolidated entities 53 47
Segment adjusted EBITDA 273 281
Maintenance capital 29 35
Facilities    
Revenues:    
Revenues 134 138
Segment Reporting, Disclosure of Other Information about Entity's Reportable Segments    
Segment adjusted EBITDA 188 167
Maintenance capital 27 9
Supply and Logistics    
Revenues:    
Revenues 6,395 3,819
Segment Reporting, Disclosure of Other Information about Entity's Reportable Segments    
Segment adjusted EBITDA 51 184
Maintenance capital 3 3
Operating Segments    
Revenues:    
Revenues 7,082 4,469
Operating Segments | Transportation    
Revenues:    
Revenues 389 383
Operating Segments | Facilities    
Revenues:    
Revenues 293 265
Operating Segments | Supply and Logistics    
Revenues:    
Revenues 6,400 3,821
Intersegment    
Revenues:    
Revenues (415) (358)
Intersegment | Transportation    
Revenues:    
Revenues (164) (142)
Intersegment | Facilities    
Revenues:    
Revenues (159) (127)
Intersegment | Supply and Logistics    
Revenues:    
Revenues (5) (2)
Intersegment Adjustment    
Revenues:    
Revenues $ (87) $ (87)