XML 83 R148.htm IDEA: XBRL DOCUMENT v3.20.1
Commitments and Contingencies - Narrative (Details)
$ in Thousands
 3 Months Ended 12 Months Ended
Jun. 30, 2019
USD ($)
facility
Dec. 31, 2019
USD ($)
case
Dec. 31, 2016
USD ($)
Loss Contingencies [Line Items]      
Nuclear insurance liability limit per incident   $ 13,900,000  
Required nuclear liability insurance   450,000  
Nuclear financial protection pool mandated by the Price-Anderson Act   13,500,000  
Maximum assessment mandated by Price-Anderson Act per nuclear reactor for a nuclear incident   $ 138,000  
Maximum assessment, administrative fee (as percent)   5.00%  
Maximum assessment payment mandated by Price-Anderson Act for a nuclear incident   $ 21,000  
Maximum assessment   44.00%  
Nuclear operator maximum annual assessment   $ 9,000  
Maximum liability per nuclear incident   61,000  
Mutual property insurance additional blanket policy property coverage   1,250,000  
Nuclear property insurance coverage limit per individual insured   1,500,000  
Lost revenue insurance maximum weekly recovery   2,500  
Accidental outage weekly recovery limit for loss revenues from a nuclear industry mutual insurance company in the event of insurable loss   $ 1,980  
The number of months a nuclear industry mutual insurance company will respond to retrospective premium adjustments   24 months  
Number of years board of directors of industry mutual insurance company can adjust policy after policy expires   6 years  
Sierra Club Et Al V. Midwest Generation L L C      
Loss Contingencies [Line Items]      
Number of facilities | facility 4    
Commonwealth Edison Company And Exelon Generation Company LLC      
Loss Contingencies [Line Items]      
Financial obligations under agreement $ 26,000    
XOOM Energy Litigation      
Loss Contingencies [Line Items]      
Number of class action lawsuits | case   2  
High      
Loss Contingencies [Line Items]      
Multiplier that the industry mutual insurance company may assess against insureds premium   10  
Low      
Loss Contingencies [Line Items]      
Multiplier that the industry mutual insurance company may assess against insureds premium   6  
Nuclear Event      
Loss Contingencies [Line Items]      
Total nuclear property insurance coverage   $ 2,750,000  
Lost revenue insurance maximum weekly recovery   274,000  
Accidental outage weekly recovery limit for loss revenues from a nuclear industry mutual insurance company in the event of insurable loss   216,000  
Non-nuclear Event      
Loss Contingencies [Line Items]      
Total nuclear property insurance coverage   1,000,000  
Lost revenue insurance maximum weekly recovery   184,000  
Accidental outage weekly recovery limit for loss revenues from a nuclear industry mutual insurance company in the event of insurable loss   $ 144,000  
Lignite Contract with Texas Westmoreland Coal Co.      
Loss Contingencies [Line Items]      
Bond obligation     $ 99,000