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Equity Narrative (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Dec. 31, 2022
Stock Repurchase Program, Remaining Authorized Repurchase Amount $ 880    
Stock Issued During Period, Value, Dividend Reinvestment Plan $ 23 $ 12  
Stock Issued During Period, Shares, Dividend Reinvestment Plan 1,800,000    
Common Units Remaining Available to be Issued Under Distribution Reinvestment Plan 10,000,000    
USAC Issue Tranche 2      
Class of Warrant or Right, Exercise Price of Warrants or Rights     $ 19.59
USAC [Member]      
Warrants and Rights Outstanding $ 10    
Series F Preferred Units [Member]      
Preferred Stock, Shares Outstanding 500,000    
Series G Preferred Units [Member]      
Preferred Stock, Shares Outstanding 1,484,780    
Series E Preferred Units [Member]      
Preferred Stock, Shares Outstanding 32,000,000    
Series D Preferred Units [Member]      
Preferred Stock, Shares Outstanding 17,800,000    
Series C Preferred Units [Member]      
Preferred Stock, Shares Outstanding 18,000,000    
Series B Preferred Units [Member]      
Preferred Stock, Shares Outstanding 550,000    
Series A Preferred Units [Member]      
Preferred Stock, Shares Outstanding 950,000    
Preferred Stock, Dividend Rate, Percentage 6.25%    
Shares Issued, Price Per Share $ 1,000    
Preferred Units, Liquidation Spread, Percent 4.028%    
Series H Preferred Units      
Preferred Stock, Shares Outstanding 900,000