XML 74 R62.htm IDEA: XBRL DOCUMENT v3.5.0.2
Regulatory Matters - Maryland and New Jersey (Details)
$ in Millions
 6 Months Ended 18 Months Ended 36 Months Ended
Apr. 28, 2016
USD ($)
Jul. 16, 2015
Feb. 27, 2013
USD ($)
Jun. 30, 2016
component
bgs
Jun. 30, 2016
USD ($)
component
bgs
Dec. 31, 2017
USD ($)
Maryland            
Regulatory Matters [Line Items]            
Expenditures for cost recovery program incurred         $ 32.0  
Incremental energy savings goal next 12 months (percent)   0.20%        
Incremental energy savings goal thereafter (percent)   2.00%        
Recovery period for expenditures for cost recovery program   5 years   3 years    
Expected infrastructure investments     $ 2,700.0      
Period of expected infrastructure investments     15 years      
New Jersey            
Regulatory Matters [Line Items]            
Number of supply components | component       2 2  
Number of basic generation services | bgs       1 1  
JCP&L | NJBPU | New Jersey            
Regulatory Matters [Line Items]            
Amount of requested rate increase (decrease) $ 142.1          
Scenario, Forecast [Member] | Maryland            
Regulatory Matters [Line Items]            
Expenditures for cost recovery program           $ 68.0