Quarterly report pursuant to Section 13 or 15(d)

Contingencies (Details)

v3.21.1
Contingencies (Details) - WGL
$ in Millions
1 Months Ended
Jun. 20, 2019
USD ($)
Feb. 28, 2021
USD ($)
Jun. 30, 2019
lawsuit
Mar. 31, 2017
USD ($)
Settled Litigation        
Contingencies        
Damages awarded $ 96      
Settlement amount received   $ 107    
Pending Litigation        
Contingencies        
Number of lawsuits | lawsuit     2  
Pending Litigation | Minimum        
Contingencies        
Damages sought       $ 40