Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Operating Revenue	$ 1,140	$ 1,117	$ 2,511	$ 2,447
Operating Expenses
Fuel and purchased energy	452	463	1,071	1,077
Other services cost of sales	49	61	94	107
Other operation and maintenance	248	221	515	437
Depreciation and amortization	157	132	316	265
Other taxes	104	102	213	206
Deferred electric service costs	(9)	(13)	21	31
Total Operating Expenses	1,001	966	2,230	2,123
Operating Income	139	151	281	324
Other Income (Expenses)
Interest and dividend income		1		1
Interest expense	(71)	(67)	(139)	(132)
Other income	12	13	21	26
Total Other Expenses	(59)	(53)	(118)	(105)
Income Before Income Tax Expense	80	98	163	219
Income Tax Expense	27	45	57	91
Net Income	$ 53	$ 53	$ 106	$ 128
Basic and Diluted Share Information
Weighted average shares outstanding - Basic (millions)	253	251	253	251
Weighted average shares outstanding - Diluted (millions)	254	252	254	251
Basic and Diluted earnings per share	$ 0.21	$ 0.21	$ 0.42	$ 0.51
Potomac Electric Power Co [Member]
Operating Revenue
Operating Revenue	$ 518	$ 508	$ 1,074	$ 1,043
Operating Expenses
Fuel and purchased energy	172	177	393	407
Other operation and maintenance	103	91	216	184
Depreciation and amortization	68	56	133	112
Other taxes	92	90	186	180
Total Operating Expenses	435	414	928	883
Operating Income	83	94	146	160
Other Income (Expenses)
Interest expense	(31)	(30)	(61)	(57)
Other income	8	10	13	19
Total Other Expenses	(23)	(20)	(48)	(38)
Income Before Income Tax Expense	60	74	98	122
Income Tax Expense	18	28	30	44
Net Income	42	46	68	78
Delmarva Power & Light Co/De [Member]
Operating Revenue
Electric	250	251	587	551
Natural gas	25	28	111	125
Operating Revenue	275	279	698	676
Operating Expenses
Fuel and purchased energy	117	121	298	282
Gas purchased	11	13	58	71
Other operation and maintenance	76	65	158	131
Depreciation and amortization	36	30	75	60
Other taxes	11	10	23	21
Total Operating Expenses	251	239	612	565
Operating Income	24	40	86	111
Other Income (Expenses)
Interest expense	(13)	(12)	(25)	(23)
Other income	2	4	5	6
Total Other Expenses	(11)	(8)	(20)	(17)
Income Before Income Tax Expense	13	32	66	94
Income Tax Expense	5	13	26	38
Net Income	8	19	40	56
Atlantic City Electric Co [Member]
Operating Revenue
Operating Revenue	286	253	619	593
Operating Expenses
Fuel and purchased energy	152	151	321	316
Other operation and maintenance	67	52	137	113
Depreciation and amortization	43	37	86	75
Other taxes	1	1	2	2
Deferred electric service costs	(9)	(13)	21	31
Total Operating Expenses	254	228	567	537
Operating Income	32	25	52	56
Other Income (Expenses)
Interest expense	(17)	(16)	(32)	(31)
Other income	2	1	3	1
Total Other Expenses	(15)	(15)	(29)	(30)
Income Before Income Tax Expense	17	10	23	26
Income Tax Expense	7	4	9	10
Net Income	$ 10	$ 6	$ 14	$ 16