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Material Contingencies - Manhattan Explosion and Fire (Details)
$ in Millions
1 Months Ended
Mar. 12, 2014
building
people
Feb. 28, 2017
USD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2020
USD ($)
Loss Contingencies [Line Items]          
Accrued regulatory liability     $ 5,328 $ 6,027  
Manhattan Explosion and Fire          
Loss Contingencies [Line Items]          
Number of buildings destroyed by fire | building 2        
Number of people died in explosion and fire incident | people 8        
Number of people injured in explosion and fire incident (more than) | people 50        
Amount of costs that will not recover from customers   $ 126      
Loss contingency accrual     40   $ 40
Insurance receivable     $ 40   $ 40
Manhattan Explosion and Fire | Settlement of gas proceedings          
Loss Contingencies [Line Items]          
Accrued regulatory liability   $ 27