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Equity Narrative (Details) - USD ($)
$ / shares in Units, $ in Millions
1 Months Ended 3 Months Ended
Apr. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Mar. 31, 2018
Payments for Repurchase of Common Stock   $ 0.0   $ 24.0
Losses from subsidiary common unit transactions   0.0   $ (103.0)
Stock Repurchase Program, Remaining Authorized Repurchase Amount   936.0    
Stock Issued During Period, Value, Dividend Reinvestment Plan   $ 2.5    
Stock Issued During Period, Shares, Dividend Reinvestment Plan   200,000    
Common Units Remaining Available to be Issued Under Distribution Reinvestment Plan   39,800,000    
ET [Member]        
Equity Distribution Agreements, Value of Units Available to be Issued   $ 1,000.0    
Proceeds From Issuance Of Common Limited Partners Units Under Equity Distribution Agreement   0.0    
USAC [Member]        
Stock Issued During Period, Value, Dividend Reinvestment Plan   $ 0.0    
Stock Issued During Period, Shares, Dividend Reinvestment Plan   16,714    
Series A Preferred Units [Member]        
Preferred Stock, Shares Issued   950,000    
Series C Preferred Units [Member]        
Preferred Stock, Shares Issued   18,000,000    
Series B Preferred Units [Member]        
Preferred Stock, Shares Issued   550,000    
Series D Preferred Units [Member]        
Preferred Stock, Shares Issued   17,800,000    
ETE Merger [Member] | Sunoco LP [Member]        
Sale of Stock, Number of Shares Issued in Transaction     2,263,158  
ETE Merger [Member] | USAC [Member]        
Sale of Stock, Number of Shares Issued in Transaction     12,466,912  
Equity Distribution Program [Member] | Sunoco LP [Member]        
Equity Distribution Agreements, Value of Units Available to be Issued   $ 295.0    
Partners' Capital Account, Units, Sale of Units   0    
Subsequent Event [Member] | Series E Preferred Units [Member]        
Preferred Stock, Shares Issued 32,000,000      
Preferred Stock, Dividend Rate, Percentage 7.60%      
Shares Issued, Price Per Share $ 25      
Preferred Units, Liquidation Spread, Percent 5.161%      
Proceeds from Issuance of Preferred Limited Partners Units $ 800.0      
Subsequent Event [Member] | Over-Allotment Option [Member] | Series E Preferred Units [Member]        
Preferred Stock, Shares Issued 4,000,000      
Proceeds from Issuance of Preferred Limited Partners Units $ 100.0