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Segment Information - Segment Financial Data (Details)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2023
USD ($)
Sep. 30, 2022
USD ($)
Sep. 30, 2023
USD ($)
segment
Sep. 30, 2022
USD ($)
Segment Reporting Information        
Operating segments number | segment     2  
Reportable segments number | segment     2  
Revenues:        
Revenues $ 12,071 $ 14,336 $ 36,014 $ 44,390
Segment Reporting, Disclosure of Other Information about Entity's Reportable Segments        
Equity earnings in unconsolidated entities 99 105 277 306
Segment Adjusted EBITDA 652 622 1,952 1,849
Maintenance capital expenditures 60 76 169 146
Product sales        
Revenues:        
Revenues 11,581 14,001 34,726 43,390
Services        
Revenues:        
Revenues 490 335 1,288 1,000
Operating Segments        
Revenues:        
Revenues 12,176 14,445 36,300 44,769
Intersegment Revenues Elimination        
Revenues:        
Revenues (105) (109) (286) (379)
Intersegment Revenues Elimination | Product sales        
Revenues:        
Revenues (101) (101) (271) (355)
Intersegment Revenues Elimination | Services        
Revenues:        
Revenues (4) (8) (15) (24)
Crude Oil        
Segment Reporting, Disclosure of Other Information about Entity's Reportable Segments        
Equity earnings in unconsolidated entities 99 105 277 306
Segment Adjusted EBITDA 553 536 1,600 1,482
Maintenance capital expenditures 39 35 107 80
Crude Oil | Operating Segments        
Revenues:        
Revenues 11,934 13,675 34,988 42,694
Crude Oil | Operating Segments | Product sales        
Revenues:        
Revenues 11,481 13,367 33,815 41,802
Crude Oil | Operating Segments | Services        
Revenues:        
Revenues 453 308 1,173 892
NGL        
Segment Reporting, Disclosure of Other Information about Entity's Reportable Segments        
Segment Adjusted EBITDA 99 86 352 367
Maintenance capital expenditures 21 41 62 66
NGL | Operating Segments        
Revenues:        
Revenues 242 770 1,312 2,075
NGL | Operating Segments | Product sales        
Revenues:        
Revenues 201 735 1,182 1,943
NGL | Operating Segments | Services        
Revenues:        
Revenues $ 41 $ 35 $ 130 $ 132