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Consolidated Statement Of Equity - USD ($)
$ in Millions
Total
General Partner [Member]
AOCI Attributable to Parent [Member]
Limited Partner [Member]
Class D Units [Member]
Series A Convertible Preferred Units [Member]
Noncontrolling Interest [Member]
PennTex Acquisition [Member]
PennTex Acquisition [Member]
General Partner [Member]
PennTex Acquisition [Member]
AOCI Attributable to Parent [Member]
PennTex Acquisition [Member]
Limited Partner [Member]
PennTex Acquisition [Member]
Class D Units [Member]
PennTex Acquisition [Member]
Series A Convertible Preferred Units [Member]
PennTex Acquisition [Member]
Noncontrolling Interest [Member]
Sale of Bakken Pipeline interest [Member]
Sale of Bakken Pipeline interest [Member]
General Partner [Member]
Sale of Bakken Pipeline interest [Member]
AOCI Attributable to Parent [Member]
Sale of Bakken Pipeline interest [Member]
Limited Partner [Member]
Sale of Bakken Pipeline interest [Member]
Class D Units [Member]
Sale of Bakken Pipeline interest [Member]
Series A Convertible Preferred Units [Member]
Sale of Bakken Pipeline interest [Member]
Noncontrolling Interest [Member]
Sale of Rover Pipeline interest [Member]
Sale of Rover Pipeline interest [Member]
General Partner [Member]
Sale of Rover Pipeline interest [Member]
AOCI Attributable to Parent [Member]
Sale of Rover Pipeline interest [Member]
Limited Partner [Member]
Sale of Rover Pipeline interest [Member]
Class D Units [Member]
Sale of Rover Pipeline interest [Member]
Series A Convertible Preferred Units [Member]
Sale of Rover Pipeline interest [Member]
Noncontrolling Interest [Member]
Subsidiary units issued for cash [Member]
Subsidiary units issued for cash [Member]
General Partner [Member]
Subsidiary units issued for cash [Member]
AOCI Attributable to Parent [Member]
Subsidiary units issued for cash [Member]
Limited Partner [Member]
Subsidiary units issued for cash [Member]
Class D Units [Member]
Subsidiary units issued for cash [Member]
Series A Convertible Preferred Units [Member]
Subsidiary units issued for cash [Member]
Noncontrolling Interest [Member]
Subsidiary units issued in certain acquisitions [Member]
Subsidiary units issued in certain acquisitions [Member]
General Partner [Member]
Subsidiary units issued in certain acquisitions [Member]
AOCI Attributable to Parent [Member]
Subsidiary units issued in certain acquisitions [Member]
Limited Partner [Member]
Subsidiary units issued in certain acquisitions [Member]
Class D Units [Member]
Subsidiary units issued in certain acquisitions [Member]
Series A Convertible Preferred Units [Member]
Subsidiary units issued in certain acquisitions [Member]
Noncontrolling Interest [Member]
Balance at Dec. 31, 2015 $ 23,553 $ (2) $ 0 $ (952) $ 22 $ 0 $ 24,485                                                                      
Increase (Decrease) in Stockholders' Equity [Roll Forward]                                                                                    
Distributions to partners (1,022) (3) 0 (1,019) 0 0 0                                                                      
Distributions to noncontrolling interest (2,795) 0 0 0 0 0 (2,795)                                                                      
Distributions reinvested 0 0 0 (173) 0 173 0                                                                      
Subsidiary unit transactions                                                         $ 2,559 $ 0 $ 0 $ 0 $ 0 $ 0 $ 2,559 $ 307 $ 0 $ 0 $ 0 $ 0 $ 0 $ 307
Capital contributions received from noncontrolling interest 236 0 0 0 0 0 236                                                                      
Non-cash compensation expense, net of units tendered by employees for tax withholdings 52 0 0 0 (22) 0 74                                                                      
Other, net 43 (1) 0 30 0 0 14                                                                      
Issuance of common units 37 0 0 39 (2) 0                                                                      
Acquisition and disposition of noncontrolling interest (779) 0 0 (779) 0 0 0                                                                      
Partners' Capital Account, Acquisitions (236) 0 0 0 0 0 236 $ (307)                                                                    
Other comprehensive income, net of tax 4 0 0 0 0 0 4                                                                      
Net income 0 3 0 983 0 9 (995)                                                                      
Balance at Dec. 31, 2016 22,431 (3) 0 (1,871) 0 180 24,125                                                                      
Increase (Decrease) in Stockholders' Equity [Roll Forward]                                                                                    
Distributions to partners (1,010) (2) 0 (1,008) 0 0 0                                                                      
Distributions to noncontrolling interest (2,999) 0 0 0 0 0 (2,999)                                                                      
Distributions reinvested 0 0 0 234 0 (234) 0                                                                      
Partners' Capital Account, Sale of Units 568 0 0 568 0 0 0                                                                      
Subsidiary unit transactions 3,235 0 0 (55) 0 (1) 3,291                                                                      
Capital contributions received from noncontrolling interest 2,202 0 0 0 0 0 2,202                                                                      
Non-cash compensation expense, net of units tendered by employees for tax withholdings 86 0 0 0 0 0 86                                                                      
Other, net (92) 0 0 0 0 0 (92)                                                                      
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests               (280) $ 0 $ 0 $ (2) $ 0 $ 0 $ (278)                                                        
Acquisition and disposition of noncontrolling interest                             $ (2,000) $ 0 $ 0 $ (42) $ 0 $ 0 $ (1,958) $ (1,478) $ 0 $ 0 $ (2) $ 0 $ 0 $ (1,476)                            
Partners' Capital Account, Acquisitions               $ 0                                                                    
Other comprehensive income, net of tax (5) 0 0 0 0 0 (5)                                                                      
Net income 2,366 2 0 915 0 37 1,412                                                                      
Balance at Dec. 31, 2017 29,980 (3) 0 (1,643) 0 450 31,176                                                                      
Increase (Decrease) in Stockholders' Equity [Roll Forward]                                                                                    
Cumulative Effect of New Accounting Principle in Period of Adoption (54) 0 0 0 0 0 (54)                                                                      
Distributions to partners 1,684 (3) 0 (1,681) 0 0 0                                                                      
Distributions to noncontrolling interest 3,117 0 0 0 0 0 (3,117)                                                                      
Distributions reinvested 0 0 0 115 0 (115)                                                                      
Subsidiary unit transactions 924 0 0 1 0 0 923                                                                      
Capital contributions received from noncontrolling interest 649 0 0 0 0 0 649                                                                      
Non-cash compensation expense, net of units tendered by employees for tax withholdings 0 0 0 21,869 0 0 (21,869)                                                                      
Other, net 61 (2) 1 47 0 (2) 17                                                                      
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests (24) 0 0 (119) 0 (7) 102                                                                      
Partners' Capital Account, Acquisitions                     $ 0                                                              
Other comprehensive income, net of tax (43) 0 (43) 0 0 0 0                                                                      
Net income 3,365                                                                                  
Noncontrolling Interest, Increase from Business Combination 832 0 0 0 0 0 832                                                                      
Stock Issued During Period, Value, Conversion of Units 0 0 0 589 0 (589) 0                                                                      
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest, Excluding Portion Attributable to Redeemable Noncontrolling Interest 3,326 3 0 1,658 0 33 1,632                                                                      
Balance at Dec. 31, 2018 $ 30,850 $ (5) $ (42) $ 20,606 $ 0 $ 0 $ 10,291