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Business Acquisitions - Schedule of Recognized Identified Assets Acquired and Liabilities Assumed (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Nov. 01, 2020
Jul. 03, 2020
Dec. 31, 2019
Business Acquisition [Line Items]          
Goodwill $ 11,650 $ 11,506     $ 9,722
Regulatory assets $ 3,963 $ 3,440      
Natural Gas Transmission and Storage          
Business Acquisition [Line Items]          
Current assets, including cash and cash equivalents     $ 582    
Property, plant and equipment     9,264    
Goodwill     1,741    
Regulatory assets     108    
Deferred income taxes     284    
Other long-term assets     1,424    
Total assets     13,403    
Current liabilities, including current portion of long-term debt     1,616    
Long-term debt, less current portion     4,415 $ 5,600  
Regulatory liabilities     650    
Other long-term liabilities     292    
Total liabilities     6,973    
Noncontrolling interest     3,916    
Net assets acquired     2,514    
Cash and cash equivalents     104    
Current portion of long-term debt     $ 1,200