XML 45 R1.htm IDEA: XBRL DOCUMENT v3.7.0.1
Document and Entity Information
3 Months Ended
Mar. 31, 2017
shares
Entity Registrant Name EXELON CORP
Entity Central Index Key 0001109357
Document Type 10-Q
Document Period End Date Mar. 31, 2017
Amendment Flag false
Document Fiscal Year Focus 2017
Document Fiscal Period Focus Q1
Current Fiscal Year End Date --12-31
Entity Well-known Seasoned Issuer Yes
Entity Voluntary Filers No
Entity Current Reporting Status Yes
Entity Filer Category Large Accelerated Filer
Entity Common Stock Shares Outstanding 926,096,660
Exelon Generation Co L L C [Member]  
Entity Registrant Name EXELON GENERATION CO LLC
Entity Central Index Key 0001168165
Entity Filer Category Non-accelerated Filer
Commonwealth Edison Co [Member]  
Entity Registrant Name COMMONWEALTH EDISON CO
Entity Central Index Key 0000022606
Entity Filer Category Non-accelerated Filer
Entity Common Stock Shares Outstanding 127,017,158
PECO Energy Co [Member]  
Entity Registrant Name PECO ENERGY CO
Entity Central Index Key 0000078100
Entity Filer Category Non-accelerated Filer
Entity Common Stock Shares Outstanding 170,478,507
Baltimore Gas and Electric Company [Member]  
Entity Registrant Name BALTIMORE GAS AND ELECTRIC
Entity Central Index Key 0000009466
Entity Filer Category Non-accelerated Filer
Entity Common Stock Shares Outstanding 1,000
Pepco Holdings LLC [Member]  
Entity Registrant Name PEPCO HOLDINGS LLC
Entity Central Index Key 0001135971
Entity Filer Category Large Accelerated Filer
Potomac Electric Power Company [Member]  
Entity Registrant Name POTOMAC ELECTRIC POWER CO
Entity Central Index Key 0000079732
Entity Filer Category Non-accelerated Filer
Entity Common Stock Shares Outstanding 100
Delmarva Power and Light Company [Member]  
Entity Registrant Name DELMARVA POWER & LIGHT CO/DE
Entity Central Index Key 0000027879
Entity Filer Category Non-accelerated Filer
Entity Common Stock Shares Outstanding 1,000
Atlantic City Electric Company [Member]  
Entity Registrant Name ATLANTIC CITY ELECTRIC CO
Entity Central Index Key 0000008192
Entity Filer Category Non-accelerated Filer
Entity Common Stock Shares Outstanding 8,546,017