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Equity (Quarterly Distributions Of Available Cash) (Details) - $ / shares
 3 Months Ended 12 Months Ended
Dec. 31, 2021
Sep. 30, 2021
Jun. 30, 2021
Mar. 31, 2021
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Dec. 31, 2021
Parent Company [Member]                            
Distribution Made to Limited Partner, Distributions Paid, Per Unit $ 0.1750 $ 0.1525 $ 0.1525 $ 0.1525 $ 0.1525 $ 0.1525 $ 0.3050 $ 0.3050 $ 0.3050 $ 0.3050 $ 0.3050 $ 0.3050 $ 0.3050  
USAC [Member]                            
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 0.5250 0.5250 0.5250 0.5250 0.5250  
Sunoco LP [Member]                            
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  
Minimum Quarterly Distribution [Member]                            
Distribution Payment Targets                           $0.4375
First Target Distribution [Member]                            
Distribution Payment Targets                           $0.4375 to $0.503125
Second Target Distribution [Member]                            
Distribution Payment Targets                           $0.503125 to $0.546875
Third Target Distribution [Member]                            
Distribution Payment Targets                           $0.546875 to $0.656250
Thereafter [Member]                            
Distribution Payment Targets                           Above $0.656250
Common Stock | Minimum Quarterly Distribution [Member]                            
Distribution Payment Targets                           100%
Common Stock | First Target Distribution [Member]                            
Distribution Payment Targets                           100%
Common Stock | Second Target Distribution [Member]                            
Distribution Payment Targets                           85%
Common Stock | Third Target Distribution [Member]                            
Distribution Payment Targets                           75%
Common Stock | Thereafter [Member]                            
Distribution Payment Targets                           50%
IDRs [Member] | Minimum Quarterly Distribution [Member]                            
Distribution Payment Targets                           —%
IDRs [Member] | First Target Distribution [Member]                            
Distribution Payment Targets                           —%
IDRs [Member] | Second Target Distribution [Member]                            
Distribution Payment Targets                           15%
IDRs [Member] | Third Target Distribution [Member]                            
Distribution Payment Targets                           25%
IDRs [Member] | Thereafter [Member]                            
Distribution Payment Targets                           50%
Series A Preferred Units [Member]                            
Distribution Made to Limited Partner, Distributions Paid, Per Unit [1] 31.25 0 [2] 31.25 0                    
Series B Preferred Units [Member]                            
Distribution Made to Limited Partner, Distributions Paid, Per Unit [1] 33.13 0 [2] 33.13 0                    
Series C Preferred Units [Member]                            
Distribution Made to Limited Partner, Distributions Paid, Per Unit 0.4609 0.4609 [2] 0.4609 0.4609                    
Series D Preferred Units [Member]                            
Distribution Made to Limited Partner, Distributions Paid, Per Unit 0.4766 0.4766 [2] 0.4766 0.4766                    
Series E Preferred Units [Member]                            
Distribution Made to Limited Partner, Distributions Paid, Per Unit 0.4750 0.4750 [2] 0.4750 0.4750                    
Series F Preferred Units [Member]                            
Distribution Made to Limited Partner, Distributions Paid, Per Unit [1] 0 33.7500 [2] 0 33.7500                    
Series G Preferred Units [Member]                            
Distribution Made to Limited Partner, Distributions Paid, Per Unit [1] 0 35.63 [2] 0 35.63                    
Series H Preferred Units                            
Distribution Made to Limited Partner, Distributions Paid, Per Unit [1] $ 0 $ 27.08 [2] $ 0 $ 0                    
[1] (1)    Series A, Series B, Series F, Series G and Series H distributions are paid on a semi-annual basis.
[2] *    Represents prorated initial distribution.