Consolidated Statement Of Income (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011		Sep. 30, 2012		Sep. 30, 2011
Operating Revenue
Power Delivery	$ 1,335		$ 1,329		$ 3,374		$ 3,671
Pepco Energy Services	131		317		544		1,005
Other	10		2		29		22
Total Operating Revenue	1,476		1,648		3,947		4,698
Operating Expenses
Fuel and purchased energy	709		948		1,948		2,759
Other services cost of sales	38		42		132		128
Other operation and maintenance	230		239		679		682
Depreciation and amortization	122		115		343		325
Other taxes	121		126		330		346
Gain on early termination of finance leases held in trust	(39)				(39)		(39)
Deferred electric service costs	29		(17)		(6)		(49)
Impairment losses	2				5
Total Operating Expenses	1,212	[1]	1,453	[2]	3,392	[3]	4,152	[4]
Operating Income	264		195		555		546
Other Income (Expenses)
Interest expense	(68)		(64)		(198)		(189)
Loss from equity investments			(3)				(4)
Other income	9		7		27		27
Total Other Expenses	(59)		(60)		(171)		(166)
Income from Continuing Operations Before Income Tax Expense	205		135		384		380
Income Tax Expense Related to Continuing Operations	93		55		142		143
Income Tax Expense	93		55		142		143	[5]
Net Income from Continuing Operations	112		80		242		237
(Loss) Income from Discontinued Operations, net of Income Taxes	0		0		0		1
Net Income	112		80		242		238
Basic and Diluted Share Information
Weighted average shares outstanding - Basic (millions)	229		226		228		226
Weighted average shares outstanding - Diluted (millions)	231		226		229		226
Earnings per share of common stock from Continuing Operations - Basic and Diluted	$ 0.49		$ 0.35		$ 1.06		$ 1.05
Earnings per share of common stock from Discontinued Operations - Basic and Diluted
Earnings per share - Basic and Diluted	$ 0.49		$ 0.35		$ 1.06		$ 1.05
Potomac Electric Power Co [Member]
Operating Revenue
Total Operating Revenue	582		603		1,503		1,643
Operating Expenses
Purchased energy	227		258		572		731
Other operation and maintenance	97		111		301		313
Depreciation and amortization	48		44		143		128
Other taxes	103		108		285		294
Total Operating Expenses	475		521		1,301		1,466
Operating Income	107		82		202		177
Other Income (Expenses)
Interest expense	(27)		(24)		(76)		(70)
Other income	5		3		13		13
Total Other Expenses	(22)		(21)		(63)		(57)
Income from Continuing Operations Before Income Tax Expense	85		61		139		120
Income Tax Expense Related to Continuing Operations	35		23		38		32
Income Tax Expense	35		23		38		32
Net Income	50		38		101		88
Delmarva Power & Light Co/De [Member]
Operating Revenue
Electric	314		298		808		841
Natural gas	26		28		124		169
Total Operating Revenue	340		326		932		1,010
Operating Expenses
Purchased energy	178		180		443		507
Gas purchased	15		18		77		114
Other operation and maintenance	65		69		192		181
Depreciation and amortization	29		22		78		66
Other taxes	10		8		26		28
Total Operating Expenses	297		297		816		896
Operating Income	43		29		116		114
Other Income (Expenses)
Interest expense	(12)		(11)		(34)		(33)
Other income	2		3		8		7
Total Other Expenses	(10)		(8)		(26)		(26)
Income from Continuing Operations Before Income Tax Expense	33		21		90		88
Income Tax Expense Related to Continuing Operations	11		10		34		32
Income Tax Expense	11		10		34		32
Net Income	22		11		56		56
Atlantic City Electric Co [Member]
Operating Revenue
Total Operating Revenue	413		399		939		1,018
Operating Expenses
Purchased energy	226		254		555		648
Other operation and maintenance	66		61		178		167
Depreciation and amortization	37		41		92		107
Other taxes	6		8		14		19
Deferred electric service costs	29		(17)		(6)		(49)
Total Operating Expenses	364		347		833		892
Operating Income	49		52		106		126
Other Income (Expenses)
Interest expense	(17)		(18)		(52)		(51)
Other income	1				3		2
Total Other Expenses	(16)		(18)		(49)		(49)
Income from Continuing Operations Before Income Tax Expense	33		34		57		77
Income Tax Expense Related to Continuing Operations	13		17		21		36
Income Tax Expense	13		17		21		36
Net Income	$ 20		$ 17		$ 36		$ 41

[1] Includes depreciation and amortization expense of $122 million, consisting of $114 million for Power Delivery, $2 million for Pepco Energy Services and $6 million for Corporate and Other.

[2] Includes depreciation and amortization expense of $115 million, consisting of $107 million for Power Delivery, $4 million for Pepco Energy Services and $4 million for Corporate and Other.

[3] Includes depreciation and amortization expense of $343 million, consisting of $313 million for Power Delivery, $12 million for Pepco Energy Services, $1 million for Other Non-Regulated and $17 million for Corporate and Other.

[4] Includes depreciation and amortization expense of $325 million, consisting of $301 million for Power Delivery, $13 million for Pepco Energy Services, $1 million for Other Non-Regulated and $10 million for Corporate and Other.

[5] Includes tax benefits of $14 million for Power Delivery primarily associated with an interest benefit related to federal tax liabilities and a $22 million reversal of previously recognized tax benefits for Other Non-Regulated associated with the early termination of finance leases held in trust.