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Redeemable Noncontrolling Interest (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended
Jun. 30, 2021
Dec. 31, 2020
Redeemable noncontrolling interests $ 776 $ 762
Preferred Units, Issued 900,000  
Preferred Stock, Redemption Price Per Share $ 887  
USAC [Member]    
Redeemable noncontrolling interests $ 477  
ETO [Member]    
Redeemable noncontrolling interests 15  
SemCAMS [Member]    
Redeemable noncontrolling interests $ 284  
Preferred Stock, Shares Outstanding 300,000  
Preferred Units [Member] | USAC [Member]    
Preferred Units, Issued 500,000  
Distribution Made to Limited Partner, Distributions Declared, Per Unit $ 24.375  
Preferred Units [Member] | SemCAMS [Member]    
Preferred Units, Issued 359,653  
Canada, Dollars    
Preferred Stock, Redemption Price Per Share $ 1,100