Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
OPERATING ACTIVITIES
Net Income (Loss)	$ 128	$ (388)
Loss from discontinued operations	0	330
Adjustments to reconcile net income (loss) to net cash from operating activities:
Depreciation and amortization	265	228
Deferred income taxes	225	(451)
Gains on sales of land	(8)
Other	(7)	(5)
Changes in:
Accounts receivable	8	(8)
Inventories	(1)	(8)
Prepaid expenses	(26)	(11)
Regulatory assets and liabilities, net	(51)	(68)
Accounts payable and accrued liabilities	(5)	(50)
Pension contributions		(120)
Pension benefit obligation, excluding contributions	23	32
Cash collateral related to derivative activities	(5)	26
Income tax-related prepayments, receivables and payables	(135)	614
Advanced payment made to taxing authority		(242)
Interest accrued	3
Other assets and liabilities	5	22
Net current assets held for disposition or sale		52
Net Cash From (Used by) Operating Activities	419	(47)
INVESTING ACTIVITIES
Investment in property, plant and equipment	(553)	(616)
Department of Energy capital reimbursement awards received	4	12
Proceeds from sale of assets	8
Changes in restricted cash equivalents	(8)	(8)
Net other investing activities	3	2
Proceeds from discontinued operations, early termination of finance leases held in trust		693
Net Cash (Used By) From Investing Activities	(546)	83
FINANCING ACTIVITIES
Dividends paid on common stock	(136)	(134)
Common stock issued for the Direct Stock Purchase and Dividend Reinvestment Plan and employee-related compensation	26	27
Issuances of common stock		324
Issuance of Series A preferred stock	90
Issuances of long-term debt	608	350
Reacquisitions of long-term debt	(206)	(19)
(Repayments) issuances of short-term debt, net	(86)	(373)
Issuance of term loan		250
Repayment of term loans		(450)
Cost of issuances	(8)	(16)
Net other financing activities		(5)
Net Cash From (Used By) Financing Activities	288	(46)
Net Increase (Decrease) in Cash and Cash Equivalents	161	(10)
Cash and Cash Equivalents at Beginning of Period	23	25
CASH AND CASH EQUIVALENTS AT END OF PERIOD	184	15
SUPPLEMENTAL CASH FLOW INFORMATION
Cash received for income taxes (includes payments from PHI for federal income taxes)	(2)	227
Potomac Electric Power Co [Member]
OPERATING ACTIVITIES
Net Income (Loss)	78	60
Adjustments to reconcile net income (loss) to net cash from operating activities:
Depreciation and amortization	112	96
Deferred income taxes	68	46
Gains on sales of land	(8)
Changes in:
Accounts receivable		(18)
Inventories		(3)
Prepaid expenses	10	13
Regulatory assets and liabilities, net	(61)	(49)
Accounts payable and accrued liabilities	(28)	(22)
Pension contributions	0	0
Pension benefit obligation, excluding contributions	8	10
Income tax-related prepayments, receivables and payables	(29)	(55)
Interest accrued	2	3
Other assets and liabilities	(3)	(2)
Net Cash From (Used by) Operating Activities	149	79
INVESTING ACTIVITIES
Investment in property, plant and equipment	(241)	(258)
Department of Energy capital reimbursement awards received	3	12
Proceeds from sale of assets	8
Changes in restricted cash equivalents	(4)	(3)
Net other investing activities	1	(4)
Net Cash (Used By) From Investing Activities	(233)	(253)
FINANCING ACTIVITIES
Dividends paid on common stock	(46)	(15)
Capital contribution from Parent	80	175
Issuances of long-term debt	404	250
Reacquisitions of long-term debt	(175)
(Repayments) issuances of short-term debt, net	(151)	(231)
Cost of issuances	(7)	(4)
Net other financing activities	(3)	(4)
Net Cash From (Used By) Financing Activities	102	171
Net Increase (Decrease) in Cash and Cash Equivalents	18	(3)
Cash and Cash Equivalents at Beginning of Period	9	9
CASH AND CASH EQUIVALENTS AT END OF PERIOD	27	6
SUPPLEMENTAL CASH FLOW INFORMATION
Cash received for income taxes (includes payments from PHI for federal income taxes)	(2)
Delmarva Power & Light Co/De [Member]
OPERATING ACTIVITIES
Net Income (Loss)	56	38
Adjustments to reconcile net income (loss) to net cash from operating activities:
Depreciation and amortization	60	52
Deferred income taxes	38	27
Changes in:
Accounts receivable	21	19
Inventories	(2)	(3)
Regulatory assets and liabilities, net	(17)	(13)
Accounts payable and accrued liabilities	(6)	(23)
Pension contributions		(10)
Income tax-related prepayments, receivables and payables	(1)	(2)
Interest accrued	1	3
Other assets and liabilities	5	15
Net Cash From (Used by) Operating Activities	155	103
INVESTING ACTIVITIES
Investment in property, plant and equipment	(172)	(164)
Changes in restricted cash equivalents	(5)
Net other investing activities	3	1
Net Cash (Used By) From Investing Activities	(174)	(163)
FINANCING ACTIVITIES
Dividends paid on common stock	(20)	(20)
Capital contribution from Parent	130
Issuances of long-term debt	204
(Repayments) issuances of short-term debt, net	(147)	77
Cost of issuances	(1)
Net Cash From (Used By) Financing Activities	166	57
Net Increase (Decrease) in Cash and Cash Equivalents	147	(3)
Cash and Cash Equivalents at Beginning of Period	2	6
CASH AND CASH EQUIVALENTS AT END OF PERIOD	149	3
SUPPLEMENTAL CASH FLOW INFORMATION
Cash received for income taxes (includes payments from PHI for federal income taxes)		(1)
Atlantic City Electric Co [Member]
OPERATING ACTIVITIES
Net Income (Loss)	16	16
Adjustments to reconcile net income (loss) to net cash from operating activities:
Depreciation and amortization	75	63
Deferred income taxes	11	21
Changes in:
Accounts receivable	9
Prepaid expenses	(36)	(39)
Regulatory assets and liabilities, net	29	(5)
Accounts payable and accrued liabilities	(4)	13
Pension contributions	0	(30)
Income tax-related prepayments, receivables and payables	4	5
Other assets and liabilities	7	4
Net Cash From (Used by) Operating Activities	111	48
INVESTING ACTIVITIES
Investment in property, plant and equipment	(104)	(141)
Department of Energy capital reimbursement awards received	1
Net other investing activities		3
Net Cash (Used By) From Investing Activities	(103)	(138)
FINANCING ACTIVITIES
Dividends paid on common stock	(26)
Capital contribution from Parent		75
Issuances of long-term debt		100
Reacquisitions of long-term debt	(20)	(19)
(Repayments) issuances of short-term debt, net	41	(69)
Net other financing activities		1
Net Cash From (Used By) Financing Activities	(5)	88
Net Increase (Decrease) in Cash and Cash Equivalents	3	(2)
Cash and Cash Equivalents at Beginning of Period	3	6
CASH AND CASH EQUIVALENTS AT END OF PERIOD	6	4
SUPPLEMENTAL CASH FLOW INFORMATION
Cash received for income taxes (includes payments from PHI for federal income taxes)		$ (13)