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Equity (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Millions
1 Months Ended 3 Months Ended 12 Months Ended
Jan. 01, 2020
Jul. 31, 2019
Apr. 30, 2019
Oct. 31, 2018
Jul. 31, 2018
May 31, 2018
Apr. 30, 2018
Feb. 28, 2018
Jan. 31, 2018
Nov. 30, 2017
Feb. 28, 2017
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Jan. 31, 2021
Jan. 31, 2020
Jul. 30, 2019
Apr. 02, 2018
Stock Issued During Period, Shares, New Issues                                                 14,500,000 2,300,000 32,200,000        
Stock Repurchase Program, Authorized Amount                       $ 2,000.0                         $ 2,000.0            
Partners' Capital Account, Unit-based Payment Arrangement, Number of Units                                                 57,600,000 1,458,900,000 0        
Stock Repurchase Program, Remaining Authorized Repurchase Amount                       $ 911.0                         $ 911.0            
Minimum beneficial percentage ownership, other than the Partnership's General Partner and its affiliates, no voting rights, not considered outstanding                       20.00%                         20.00%            
Limited Partners' Capital Account, Units Outstanding                       2,689,600,000       2,619,368,605       1,079,100,000       1,046,900,000 2,689,600,000 2,619,368,605 1,079,100,000        
Stock Issued During Period, Shares, Conversion of Units           79,100,000                                                  
Limited Partner interest in the Partnership, percentage                                                 99.90%            
Units repurchased under buyback program                                                 $ 25.0 $ 0.0 $ 0.0        
Equity Distribution Agreements, Value of Units Available to be Issued                       $ 1,000.0                         1,000.0            
Stock Issued During Period, Value, Dividend Reinvestment Plan                                                 $ 148.0            
Common Units Remaining Available to be Issued Under Distribution Reinvestment Plan                       29,000,000                         29,000,000            
Proceeds from Issuance of Common Limited Partners Units                                                 $ 0.0 $ 0.0 $ 568.0        
Parent Company [Member]                                                              
Distribution Made to Limited Partner, Distributions Paid, Per Unit                       $ 0.3050 $ 0.3050 $ 0.3050 $ 0.3050 $ 0.3050 $ 0.3050 $ 0.3050 $ 0.3050 $ 0.3050 [1] $ 0.2950 [1] $ 0.2850 [1] $ 0.2850 [1] $ 0.2850 [1]              
PennTex [Member]                                                              
Sale of Stock, Price Per Share                                           20.00                  
Phillips 66 Company [Member] | Dakota Access and ETCOC [Member]                                                              
Subsidiary of Limited Liability Company or Limited Partnership, Ownership Interest                     25.00%                                        
Sunoco LP [Member]                                                              
Number of common units of a subsidiary partnership that are held by a wholly-owned subsidiary of the Parent.                       28,500,000                         28,500,000            
Distribution Made to Limited Partner, Distributions Paid, Per Unit                       $ 0.8255 0.8255 0.8255 0.8255 $ 0.8255 0.8255 0.8255 0.8255 0.8255 0.8255 0.8255 $ 0.8255 0.8255              
Stock Repurchased During Period, Shares               17,286,859                                              
Units repurchased under buyback program               $ 540.0                                              
USAC [Member]                                                              
Number of common units of a subsidiary partnership that are held by a wholly-owned subsidiary of the Parent.                               39,700,000                   39,700,000       46,100,000  
Distribution Made to Limited Partner, Distributions Paid, Per Unit                       $ 0.5250 $ 0.5250 $ 0.5250 $ 0.5250 $ 0.5250 $ 0.5250 $ 0.5250 0.5250                        
Limited Partners' Capital Account, Units Outstanding                       96,600,000                         96,600,000            
Stock Issued During Period, Value, Dividend Reinvestment Plan                                                 $ 1.0 $ 0.6          
Stock Issued During Period, Shares, Dividend Reinvestment Plan                                                 60,584 39,280          
Bakken Holdings Company LLC [Member] | Sunoco Logistics [Member]                                                              
Subsidiary of Limited Liability Company or Limited Partnership, Ownership Interest                     49.00%                                        
Bakken Pipeline Investments LLC [Member] | Dakota Access and ETCOC [Member]                                                              
Subsidiary of Limited Liability Company or Limited Partnership, Ownership Interest                     75.00%                                        
Convertible Preferred Stock [Member]                                                              
Limited Partners' Capital Account, Units Outstanding           329,300,000                                                  
Series A Preferred Units [Member]                                                              
Preferred Stock, Shares Issued                   950,000                                          
Preferred Stock, Dividend Rate, Percentage                   6.25%                                          
Shares Issued, Price Per Share                   $ 1,000                                          
Preferred Units, Liquidation Spread, Percent                   4.028%                                          
Series A Preferred Units [Member] | Sunoco LP [Member]                                                              
Payments for Repurchase of Preferred Stock and Preference Stock                 $ 300.0                           $ 300.0                
Stock Repurchased and Retired During Period, Shares                                             12,000,000.0                
Preferred Stock, Dividend Rate, Percentage                                             10.00%                
Preferred Stock, Liquidation Preference Per Share                                             $ 25.00                
Preferred Units, Liquidation Spread, Percent                                             8.00%                
Preferred Stock Redemption Premium                 $ 313.0                                            
Call premium on preferred units.                 1.00%                                            
Series C Preferred Units [Member]                                                              
Preferred Stock, Shares Issued             18,000,000                                                
Preferred Stock, Dividend Rate, Percentage             7.375%                                                
Shares Issued, Price Per Share             $ 25                                                
Preferred Units, Liquidation Spread, Percent             4.53%                                                
Preferred Stock, Redemption Price Per Share             $ 25                                                
Series B Preferred Units [Member]                                                              
Preferred Stock, Shares Issued                   550,000                                          
Preferred Stock, Dividend Rate, Percentage                   6.625%                                          
Shares Issued, Price Per Share                   $ 1,000                                          
Preferred Units, Liquidation Spread, Percent                   4.155%                                          
Series D Preferred Units [Member]                                                              
Preferred Stock, Dividend Rate, Percentage         7.625%                                                    
Shares Issued, Price Per Share         $ 25         $ 25                                          
Preferred Stock, Liquidation Preference Per Share         $ 17,800,000                                                    
Preferred Units, Liquidation Spread, Percent         4.738%                                                    
Preferred Stock, Redemption Price Per Share                   $ 25                                          
Series E Preferred Units [Member]                                                              
Preferred Stock, Dividend Rate, Percentage     7.60%                                                        
Shares Issued, Price Per Share     $ 25                                                        
Preferred Units, Liquidation Spread, Percent     5.161%                                                        
Preferred Stock, Redemption Price Per Share     $ 25                                                        
Preferred Units, Outstanding     32,000,000                                                        
Class B Units [Member] | USAC [Member]                                                              
Number of common units of a subsidiary partnership that are held by a wholly-owned subsidiary of the Parent.                               6,400,000                   6,400,000          
Partners' Capital Account, Units, Converted   6,397,965                                                          
Class K Units [Member]                                                              
Number of common units of a subsidiary partnership that are held by a wholly-owned subsidiary of the Parent.                       101,500,000                         101,500,000            
Distribution Made to Limited Partner, Distributions Declared, Per Unit                                               0.67275              
Cash Distributions, Percent                       1.50%                         1.50%            
Class L Units [Member]                                                              
Cash Distributions, Percent                       7.65%                         7.65%            
Class M Units [Member]                                                              
Preferred Stock, Dividend Rate, Percentage                                                 8.00%            
ETE Merger [Member]                                                              
Sale of Stock, Number of Shares Issued in Transaction       1,460,000,000                                                      
ETE Merger [Member] | Sunoco LP [Member]                                                              
Sale of Stock, Number of Shares Issued in Transaction       2,263,158                       2,263,158                              
ETE Merger [Member] | USAC [Member]                                                              
Limited Partner interest in the Partnership, percentage       100.00%                       100.00%                              
Sale of Stock, Number of Shares Issued in Transaction       12,466,912                       12,466,912                              
USAC [Member]                                                              
Stock Issued During Period, Shares, Conversion of Units   6,397,965                                                          
Class D Units [Member]                                                              
Stock Issued During Period, Shares, New Issues                                                 0 79,100,000 0        
Series A Convertible Preferred Units [Member]                                                              
Units repurchased under buyback program                                                 $ 0.0            
ETE Class A Units [Member] | ETE Merger [Member]                                                              
Sale of Stock, Number of Shares Issued in Transaction       647,745,099                                                      
Series A Convertible Preferred Units [Member] | Parent Company [Member]                                                              
Distribution Made to Limited Partner, Distributions Paid, Per Unit                                     $ 0.1100 $ 0.1100 $ 0.1100 $ 0.1100 $ 0.1100 $ 0.11              
Strike price of $17.03 [Member] | USAC [Member]                                                              
Class of Warrant or Right, Number of Securities Called by Warrants or Rights                                                             5,000,000
Class of Warrant or Right, Exercise Price of Warrants or Rights                                                             $ 17.03
Strike price of $19.59 [Member] | USAC [Member]                                                              
Class of Warrant or Right, Number of Securities Called by Warrants or Rights                                                             10,000,000
Class of Warrant or Right, Exercise Price of Warrants or Rights                                                             $ 19.59
Equity Distribution Program [Member] | Sunoco LP [Member]                                                              
Equity Distribution Agreements, Value of Units Available to be Issued                       $ 295.0                         $ 295.0            
Partners' Capital Account, Units, Sale of Units                                                 0 1,300,000          
Proceeds from Issuance of Common Limited Partners Units                                                   $ 33.0          
Payments for Commissions                                                   $ 0.3          
Subsequent Event [Member]                                                              
Preferred Stock, Redemption Price Per Share                                                       $ 845      
Subsequent Event [Member] | Series F Preferred Units [Member]                                                              
Preferred Stock, Dividend Rate, Percentage 6.75%                                                            
Shares Issued, Price Per Share                                                         $ 1,000    
Preferred Units, Issued                                                         500,000    
Preferred Units, Liquidation Spread, Percent                                                         5.134%    
Subsequent Event [Member] | Series G Preferred Units [Member]                                                              
Preferred Stock, Dividend Rate, Percentage 7.125%                                                            
Shares Issued, Price Per Share                                                         $ 1,000    
Preferred Units, Issued                                                         1,100,000    
Preferred Units, Liquidation Spread, Percent                                                         5.306%    
[1]
Certain common unitholders elected to participate in a plan pursuant to which those unitholders elected to forego their cash distributions on all or a portion of their common units for a period of up to nine quarters commencing with the distribution for the quarter ended March 31, 2016 and, in lieu of receiving cash distributions on these common units for each such quarter, each said unitholder received ET Series A Convertible Preferred Units (on a one-for-one basis for each common unit as to which the participating unitholder elected be subject to this plan) that entitled them to receive a cash distribution of up to $0.11 per unit. See additional information below.