XML 172 R142.htm IDEA: XBRL DOCUMENT v3.8.0.1
Commitments and Contingencies - Contingencies (Details 1)
 1 Months Ended 7 Months Ended 12 Months Ended 29 Months Ended 101 Months Ended
Jun. 01, 2001
Feb. 20, 2018
USD ($)
Jun. 30, 2010
Plaintiff
Mar. 10, 2010
Claim
Dec. 31, 2017
USD ($)
lawsuit
Jul. 31, 2013
Claim
Dec. 31, 2017
USD ($)
lawsuit
Plaintiff
Dec. 31, 2012
Claim
Loss Contingencies [Line Items]                
Nuclear insurance liability limit per incident         $ 13,440,000,000   $ 13,440,000,000  
Required nuclear liability insurance         450,000,000   450,000,000  
Nuclear financial protection pool mandated by the Price-Anderson Act         13,000,000,000   13,000,000,000  
Maximum assessment mandated by Price-Anderson Act per nuclear reactor for a nuclear incident         $ 127,000,000   $ 127,000,000  
Maximum assessment, administrative fee (as percent)         5.00%   5.00%  
Maximum annual assessment payment mandated by Price-Anderson Act for a nuclear incident         $ 19,000,000   $ 19,000,000  
Nuclear operator maximum annual assessment         $ 8,000,000   $ 8,000,000  
44% maximum assessment         44.00%   44.00%  
Maximum liability per nuclear incident         $ 112,000,000   $ 112,000,000  
Mutual property insurance additional blanket policy property coverage         1,250,000,000   1,250,000,000  
Nuclear property insurance coverage limit per individual insured         1,500,000,000   1,500,000,000  
Mutual Lost Revenue Insurance Maximum Weekly Recovery         2,520,000   2,520,000  
Accidental outage weekly recovery limit for loss revenues from a nuclear industry mutual insurance company in the event of insurable loss         $ 1,980,000   $ 1,980,000  
Multiplier that the industry mutual insurance company may assess against insureds premium         10   10  
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      
Telephone Consumer Protection Act Purported Class Actions                
Loss Contingencies [Line Items]                
Number of cases | lawsuit         3      
Damages sought         $ 1,500      
Telephone Consumer Protection Act Purported Class Actions | California                
Loss Contingencies [Line Items]                
Number of cases | lawsuit             1  
Telephone Consumer Protection Act Purported Class Actions | New Jersey                
Loss Contingencies [Line Items]                
Number of cases | lawsuit             2  
CDWR and SDGE v Sunrise Power                
Loss Contingencies [Line Items]                
Damages sought         $ 1,200,000      
Power Purchase Agreement (PPA) period 10 years              
Remaining Term         70 months      
Nuclear Event                
Loss Contingencies [Line Items]                
Total nuclear property insurance coverage         $ 2,750,000,000   $ 2,750,000,000  
Mutual Lost Revenue Insurance Maximum Weekly Recovery         274,400,000   274,400,000  
Accidental outage weekly recovery limit for loss revenues from a nuclear industry mutual insurance company in the event of insurable loss         215,600,000   215,600,000  
Non-nuclear Event                
Loss Contingencies [Line Items]                
Total nuclear property insurance coverage         1,500,000,000   1,500,000,000  
Mutual Lost Revenue Insurance Maximum Weekly Recovery         183,500,000   183,500,000  
Accidental outage weekly recovery limit for loss revenues from a nuclear industry mutual insurance company in the event of insurable loss         144,000,000   $ 144,000,000  
Midwest Generation New Source Review                
Loss Contingencies [Line Items]                
Claims dismissed | Claim       9   9    
Pending claims | Claim       10   10   1
Number of plaintiffs | Plaintiff     1       1  
Midwest Generation New Source Review | Minimum                
Loss Contingencies [Line Items]                
Pending claims | Plaintiff     1          
Midwest Generation New Source Review | Maximum                
Loss Contingencies [Line Items]                
Pending claims | Plaintiff     10          
Lignite Contract with Texas Westmoreland Coal Co. | Texas Westmoreland Coal Co.                
Loss Contingencies [Line Items]                
Bond obligation         $ 95,500,000   $ 95,500,000  
Subsequent Event                
Loss Contingencies [Line Items]                
Agreement to pay the State of Illinois and Federal Government   $ 500,000