Consolidated Statements of Income (Loss) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Operating Revenue	$ 1,313	$ 1,344	$ 3,760	$ 3,575
Operating Expenses
Fuel and purchased energy	545	579	1,622	1,587
Other services cost of sales	54	37	161	112
Other operation and maintenance	242	208	679	647
Depreciation and amortization	145	124	410	352
Other taxes	109	119	315	325
Deferred electric service costs	(1)	42	30	39
Impairment loss	53		53
Total Operating Expenses	1,147	1,109	3,270	3,062
Operating Income	166	235	490	513
Other Income (Expenses)
Interest expense	(68)	(68)	(200)	(205)
Other income	15	8	42	24
Total Other Expenses	(53)	(60)	(158)	(181)
Income Before Income Tax Expense	113	175	332	332
Income Tax Expense (Benefit)	34	65	125	280
Net Income from Continuing Operations	79	110	207	52
Income (Loss) from Discontinued Operations, Net of Income Taxes		8		(322)
Net Income (Loss)	79	118	207	(270)
Basic and Diluted Share Information
Weighted average shares outstanding - Basic (millions)	252	249	251	245
Weighted average shares outstanding - Diluted (millions)	252	249	252	245
Earnings per share of common stock from Continuing Operations - Basic and Diluted	$ 0.31	$ 0.44	$ 0.82	$ 0.21
Earnings (loss) per share of common stock from Discontinued Operations - Basic and Diluted		$ 0.04		$ (1.31)
Basic and Diluted earnings (loss) per share	$ 0.31	$ 0.48	$ 0.82	$ (1.10)
Potomac Electric Power Co [Member]
Operating Revenue
Operating Revenue	587	605	1,630	1,551
Operating Expenses
Fuel and purchased energy	205	227	612	576
Other operation and maintenance	103	95	287	292
Depreciation and amortization	59	51	171	147
Other taxes	95	103	275	280
Total Operating Expenses	462	476	1,345	1,295
Operating Income	125	129	285	256
Other Income (Expenses)
Interest expense	(29)	(28)	(86)	(82)
Other income	9	5	28	14
Total Other Expenses	(20)	(23)	(58)	(68)
Income Before Income Tax Expense	105	106	227	188
Income Tax Expense (Benefit)	38	40	82	62
Net Income (Loss)	67	66	145	126
Delmarva Power & Light Co/De [Member]
Operating Revenue
Electric	289	273	840	795
Natural gas	20	23	145	137
Operating Revenue	309	296	985	932
Operating Expenses
Fuel and purchased energy	140	142	422	422
Gas purchased	9	11	80	80
Other operation and maintenance	71	59	202	191
Depreciation and amortization	33	27	93	79
Other taxes	11	10	32	29
Total Operating Expenses	264	249	829	801
Operating Income	45	47	156	131
Other Income (Expenses)
Interest expense	(12)	(13)	(35)	(38)
Other income	3	3	9	7
Total Other Expenses	(9)	(10)	(26)	(31)
Income Before Income Tax Expense	36	37	130	100
Income Tax Expense (Benefit)	13	14	51	39
Net Income (Loss)	23	23	79	61
Atlantic City Electric Co [Member]
Operating Revenue
Operating Revenue	347	396	940	944
Operating Expenses
Fuel and purchased energy	188	198	504	509
Other operation and maintenance	65	58	178	177
Depreciation and amortization	42	38	117	101
Other taxes	1	5	3	11
Deferred electric service costs	(1)	42	30	39
Total Operating Expenses	295	341	832	837
Operating Income	52	55	108	107
Other Income (Expenses)
Interest expense	(16)	(17)	(47)	(52)
Other income	1		2
Total Other Expenses	(15)	(17)	(45)	(52)
Income Before Income Tax Expense	37	38	63	55
Income Tax Expense (Benefit)	14	13	24	14
Net Income (Loss)	$ 23	$ 25	$ 39	$ 41