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Investments - Sale of an interest in NGPL Holdings (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Mar. 08, 2021
Schedule of Equity Method Investments [Line Items]      
Proceeds from sales of investments $ 0 $ 413  
Gain on sale of interests in NGPL Holdings LLC $ 0 206  
NGPL Holdings, LLC      
Schedule of Equity Method Investments [Line Items]      
Proceeds from sales of investments   413  
Gain on sale of interests in NGPL Holdings LLC   $ 206  
ArcLight Capital Partners, LLC | NGPL Holdings, LLC      
Schedule of Equity Method Investments [Line Items]      
Ownership Percentage     25.00%
Brookfield | NGPL Holdings, LLC      
Schedule of Equity Method Investments [Line Items]      
Ownership Percentage 37.50%    
KMI | NGPL Holdings, LLC      
Schedule of Equity Method Investments [Line Items]      
Ownership Percentage 37.50%