CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
OPERATING ACTIVITIES
Net (loss) income	$ (388)	$ 130
Income from discontinued operations	(4)	(17)
Adjustments to reconcile net (loss) income to net cash from operating activities:
Depreciation and amortization	228	221
Non-cash rents from cross-border energy lease investments	(7)	(26)
Losses on early termination of finance leases held in trust	14
Non-cash charge to reduce carrying value of PHI's cross-border energy lease investments	373
Deferred income taxes	(451)	235
Impairment losses		3
Other	(8)	(8)
Changes in:
Accounts receivable	(8)	9
Inventories	(8)	(18)
Prepaid expenses	(2)	(11)
Regulatory assets and liabilities, net	(68)	(93)
Accounts payable and accrued liabilities	(37)	(13)
Pension contributions	(120)	(200)
Pension benefit obligation, excluding contributions	32	33
Cash collateral related to derivative activities	28	53
Income tax-related prepayments, receivables and payables	614	(184)
Advanced payment made to taxing authority	(242)
Other assets and liabilities	22	10
Net assets held for disposition	(3)
Net Cash (Used By) From Operating Activities	(35)	124
INVESTING ACTIVITIES
Investment in property, plant and equipment	(616)	(589)
Department of Energy capital reimbursement awards received	12	22
Proceeds from early termination of finance leases held in trust	693
Changes in restricted cash equivalents	(8)	2
Net other investing activities	2	5
Net Cash From (Used By) Investing Activities	83	(560)
FINANCING ACTIVITIES
Dividends paid on common stock	(134)	(123)
Common stock issued for the Dividend Reinvestment Plan and employee-related compensation	27	28
Issuances of common stock	324
Issuances of long-term debt	350	450
Reacquisitions of long-term debt	(19)	(122)
(Repayments) issuances of short-term debt, net	(373)	(57)
Issuances of term loan	250	200
Repayments of term loan	(450)
Cost of issuances	(16)	(7)
Net other financing activities	(17)	(3)
Net Cash (Used by) From Financing Activities	(58)	366
Net (Decrease) Increase in Cash and Cash Equivalents	(10)	(70)
Cash and Cash Equivalents at Beginning of Period	25	109
CASH AND CASH EQUIVALENTS AT END OF PERIOD	15	39
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Cash paid (received) for income taxes, net	227	(3)
Potomac Electric Power Co [Member]
OPERATING ACTIVITIES
Net (loss) income	60	51
Adjustments to reconcile net (loss) income to net cash from operating activities:
Depreciation and amortization	96	95
Deferred income taxes	46	127
Changes in:
Accounts receivable	(18)	4
Inventories	(3)	(11)
Prepaid expenses	13	14
Regulatory assets and liabilities, net	(49)	(34)
Accounts payable and accrued liabilities	(17)	(2)
Pension contributions		(85)
Pension benefit obligation, excluding contributions	10	11
Income tax-related prepayments, receivables and payables	(55)	(129)
Interest accrued	3
Other assets and liabilities	(2)	(5)
Net Cash (Used By) From Operating Activities	84	36
INVESTING ACTIVITIES
Investment in property, plant and equipment	(258)	(306)
Department of Energy capital reimbursement awards received	12	21
Changes in restricted cash equivalents	(3)
Net other investing activities	(4)	3
Net Cash From (Used By) Investing Activities	(253)	(282)
FINANCING ACTIVITIES
Dividends paid on common stock	(15)
Capital contributions from Parent	175	50
Issuances of long-term debt	250	200
Reacquisitions of long-term debt		(38)
(Repayments) issuances of short-term debt, net	(231)	34
Cost of issuances	(4)	(4)
Net other financing activities	(9)	(1)
Net Cash (Used by) From Financing Activities	166	241
Net (Decrease) Increase in Cash and Cash Equivalents	(3)	(5)
Cash and Cash Equivalents at Beginning of Period	9	12
CASH AND CASH EQUIVALENTS AT END OF PERIOD	6	7
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Cash paid (received) for income taxes, net		1
Delmarva Power & Light Co/De [Member]
OPERATING ACTIVITIES
Net (loss) income	38	34
Adjustments to reconcile net (loss) income to net cash from operating activities:
Depreciation and amortization	52	49
Deferred income taxes	27	33
Changes in:
Accounts receivable	19	25
Inventories	(3)	(6)
Regulatory assets and liabilities, net	(13)	(23)
Accounts payable and accrued liabilities	(21)	6
Pension contributions	(10)	(85)
Income tax-related prepayments, receivables and payables	(2)	(12)
Interest accrued	3	3
Other assets and liabilities	15	9
Net Cash (Used By) From Operating Activities	105	33
INVESTING ACTIVITIES
Investment in property, plant and equipment	(164)	(145)
Net other investing activities	1	(2)
Net Cash From (Used By) Investing Activities	(163)	(147)
FINANCING ACTIVITIES
Dividends paid on common stock	(20)
Issuances of long-term debt		250
Reacquisitions of long-term debt		(66)
(Repayments) issuances of short-term debt, net	77	(47)
Cost of issuances		(3)
Net other financing activities	(2)
Net Cash (Used by) From Financing Activities	55	134
Net (Decrease) Increase in Cash and Cash Equivalents	(3)	20
Cash and Cash Equivalents at Beginning of Period	6	5
CASH AND CASH EQUIVALENTS AT END OF PERIOD	3	25
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Cash paid (received) for income taxes, net	(1)	(3)
Atlantic City Electric Co [Member]
OPERATING ACTIVITIES
Net (loss) income	16	16
Adjustments to reconcile net (loss) income to net cash from operating activities:
Depreciation and amortization	63	55
Deferred income taxes	21	64
Changes in:
Prepaid expenses	(39)	(43)
Regulatory assets and liabilities, net	(5)	(36)
Accounts payable and accrued liabilities	14	5
Pension contributions	(30)	(30)
Income tax-related prepayments, receivables and payables	5	(47)
Other assets and liabilities	4	(3)
Net Cash (Used By) From Operating Activities	49	(19)
INVESTING ACTIVITIES
Investment in property, plant and equipment	(141)	(114)
Department of Energy capital reimbursement awards received		1
Net other investing activities	3	2
Net Cash From (Used By) Investing Activities	(138)	(111)
FINANCING ACTIVITIES
Dividends paid on common stock		(15)
Capital contributions from Parent	75
Issuances of long-term debt	100
Reacquisitions of long-term debt	(19)	(18)
(Repayments) issuances of short-term debt, net	(69)	74
Net other financing activities		1
Net Cash (Used by) From Financing Activities	87	42
Net (Decrease) Increase in Cash and Cash Equivalents	(2)	(88)
Cash and Cash Equivalents at Beginning of Period	6	91
CASH AND CASH EQUIVALENTS AT END OF PERIOD	4	3
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Cash paid (received) for income taxes, net	$ (13)