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Equity - Quarterly Distributions of Available Cash (Details) - $ / shares
3 Months Ended
Jun. 30, 2021
Mar. 31, 2021
Dec. 31, 2020
Distribution Made to Limited Partner, Distributions Paid, Per Unit $ 0.1525 $ 0.1525 $ 0.1525
USAC [Member]      
Distribution Made to Limited Partner, Distributions Paid, Per Unit 0.5250 0.5250 0.5250
Sunoco LP [Member]      
Distribution Made to Limited Partner, Distributions Paid, Per Unit 0.8255 0.8255 $ 0.8255
Series A Preferred Units [Member]      
Distribution Made to Limited Partner, Distributions Paid, Per Unit [1] 31.25 0  
Series B Preferred Units [Member]      
Distribution Made to Limited Partner, Distributions Paid, Per Unit [1] 33.125 0  
Series C Preferred Units [Member]      
Distribution Made to Limited Partner, Distributions Paid, Per Unit 0.4609 0.4609  
Series D Preferred Units [Member]      
Distribution Made to Limited Partner, Distributions Paid, Per Unit 0.4766 0.4766  
Series E Preferred Units [Member]      
Distribution Made to Limited Partner, Distributions Paid, Per Unit 0.4750 0.4750  
Series F Preferred Units [Member]      
Distribution Made to Limited Partner, Distributions Paid, Per Unit [1] 0 33.75  
Series G Preferred Units [Member]      
Distribution Made to Limited Partner, Distributions Paid, Per Unit [1] 0 35.63  
Series H Preferred Stock      
Distribution Made to Limited Partner, Distributions Paid, Per Unit [1] $ 0 $ 0  
[1] Series A, Series B, Series F, Series G and Series H distributions are paid on a semi-annual basis.