Shareholders' Equity Shareholder Equity (Tables)

12 Months Ended

Dec. 31, 2017

Shareholder [Abstract]

Schedule of Common Stock Outstanding Roll Forward [Table Text Block]

The following table presents common stock authorized and outstanding as of December 31, 2017 and 2016:

				December 31,
				2017	2016
	Par Value		Shares Authorized	Shares Outstanding
Common Stock
Exelon	no par value		2,000,000,000	963,335,888	924,035,059
ComEd	$	12.50	250,000,000	127,021,246	127,017,157
PECO	no par value		500,000,000	170,478,507	170,478,507
BGE	no par value		1,500	1,000	1,000
Pepco	$	0.01	200,000,000	100	100
DPL	$	2.25	1,000	1,000	1,000
ACE	$	3.00	25,000,000	8,546,017	8,546,017