Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
OPERATING ACTIVITIES
Net Income (Loss)	$ 207	$ (270)
Loss from discontinued operations		322
Adjustments to reconcile net income (loss) to net cash from operating activities:
Depreciation and amortization	410	352
Deferred income taxes	259	(386)
Gains on sales of land	(9)
Impairment loss	53
Other	4	(9)
Changes in:
Accounts receivable	18	(55)
Inventories	(4)	(15)
Prepaid expenses	(27)	6
Regulatory assets and liabilities, net	(135)	(74)
Accounts payable and accrued liabilities	39	(50)
Pension contributions		(120)
Pension benefit obligation, excluding contributions	36	49
Cash collateral related to derivative activities	(6)	28
Income tax-related prepayments, receivables and payables	(138)	618
Advanced payment made to taxing authority		(242)
Interest accrued	33	37
Other assets and liabilities	9	27
Net current assets held for disposition or sale		40
Net Cash From Operating Activities	749	258
INVESTING ACTIVITIES
Investment in property, plant and equipment	(846)	(943)
Department of Energy capital reimbursement awards received	4	17
Proceeds from sales of land	9
Changes in restricted cash equivalents	(7)	(2)
Net other investing activities	(4)
Proceeds from discontinued operations, early termination of finance leases held in trust		873
Net Cash Used By Investing Activities	(844)	(55)
FINANCING ACTIVITIES
Dividends paid on common stock	(204)	(201)
Common stock issued for the Direct Stock Purchase and Dividend Reinvestment Plan and employee-related compensation	29	38
Issuances of common stock		324
Issuances of Series A preferred stock	108
Issuances of long-term debt	771	350
Reacquisitions of long-term debt	(232)	(96)
(Repayments) issuances of short-term debt, net	(32)	(361)
Issuance of term loan		250
Repayment of term loans	(100)	(450)
Cost of issuances	(10)	(17)
Net other financing activities	(1)	(7)
Net Cash From (Used By) Financing Activities	329	(170)
Net Increase (Decrease) in Cash and Cash Equivalents	234	33
Cash and Cash Equivalents at Beginning of Period	23	25
CASH AND CASH EQUIVALENTS AT END OF PERIOD	257	58
SUPPLEMENTAL CASH FLOW INFORMATION
Cash received for income taxes (includes payments from PHI for federal income taxes)	(1)	228
Potomac Electric Power Co [Member]
OPERATING ACTIVITIES
Net Income (Loss)	145	126
Adjustments to reconcile net income (loss) to net cash from operating activities:
Depreciation and amortization	171	147
Deferred income taxes	161	110
Gains on sales of land	(9)
Changes in:
Accounts receivable	(8)	(59)
Inventories	2	(3)
Prepaid expenses	(3)	(8)
Regulatory assets and liabilities, net	(112)	(74)
Accounts payable and accrued liabilities	(16)
Pension contributions	0	0
Pension benefit obligation, excluding contributions	12	16
Income tax-related prepayments, receivables and payables	(30)	(50)
Interest accrued	15	21
Other assets and liabilities	(3)	(2)
Net Cash From Operating Activities	325	224
INVESTING ACTIVITIES
Investment in property, plant and equipment	(380)	(403)
Department of Energy capital reimbursement awards received	3	16
Proceeds from sales of land	9
Changes in restricted cash equivalents		(3)
Net other investing activities	(4)	(8)
Net Cash Used By Investing Activities	(372)	(398)
FINANCING ACTIVITIES
Dividends paid on common stock	(46)	(46)
Capital contributions from Parent	80	175
Issuances of long-term debt	410	250
Reacquisitions of long-term debt	(175)
(Repayments) issuances of short-term debt, net	(151)	(200)
Cost of issuances	(7)	(4)
Net other financing activities	(1)	(2)
Net Cash From (Used By) Financing Activities	110	173
Net Increase (Decrease) in Cash and Cash Equivalents	63	(1)
Cash and Cash Equivalents at Beginning of Period	9	9
CASH AND CASH EQUIVALENTS AT END OF PERIOD	72	8
SUPPLEMENTAL CASH FLOW INFORMATION
Cash received for income taxes (includes payments from PHI for federal income taxes)	(58)	(26)
Delmarva Power & Light Co/De [Member]
OPERATING ACTIVITIES
Net Income (Loss)	79	61
Adjustments to reconcile net income (loss) to net cash from operating activities:
Depreciation and amortization	93	79
Deferred income taxes	94	48
Changes in:
Accounts receivable	43	26
Inventories	(9)	(10)
Regulatory assets and liabilities, net	(47)	(35)
Accounts payable and accrued liabilities	1	(20)
Pension contributions	0	(10)
Income tax-related prepayments, receivables and payables	2
Interest accrued	10	9
Other assets and liabilities	1	10
Net Cash From Operating Activities	267	158
INVESTING ACTIVITIES
Investment in property, plant and equipment	(251)	(249)
Changes in restricted cash equivalents	(5)
Net other investing activities	(1)	1
Net Cash Used By Investing Activities	(257)	(248)
FINANCING ACTIVITIES
Dividends paid on common stock	(20)	(30)
Capital contributions from Parent	130
Issuances of long-term debt	204
(Repayments) issuances of short-term debt, net	(147)	118
Cost of issuances	(2)
Net other financing activities	1
Net Cash From (Used By) Financing Activities	166	88
Net Increase (Decrease) in Cash and Cash Equivalents	176	(2)
Cash and Cash Equivalents at Beginning of Period	2	6
CASH AND CASH EQUIVALENTS AT END OF PERIOD	178	4
SUPPLEMENTAL CASH FLOW INFORMATION
Cash received for income taxes (includes payments from PHI for federal income taxes)	(43)	(8)
Atlantic City Electric Co [Member]
OPERATING ACTIVITIES
Net Income (Loss)	39	41
Adjustments to reconcile net income (loss) to net cash from operating activities:
Depreciation and amortization	117	101
Deferred income taxes	28	43
Changes in:
Accounts receivable	(10)	(23)
Inventories	2	(2)
Prepaid expenses	(15)	(11)
Regulatory assets and liabilities, net	26	35
Accounts payable and accrued liabilities	11	(3)
Pension contributions	0	(30)
Income tax-related prepayments, receivables and payables	(1)	(1)
Other assets and liabilities	18	15
Net Cash From Operating Activities	215	165
INVESTING ACTIVITIES
Investment in property, plant and equipment	(158)	(204)
Department of Energy capital reimbursement awards received	1	1
Net other investing activities	(3)	1
Net Cash Used By Investing Activities	(160)	(202)
FINANCING ACTIVITIES
Dividends paid on common stock	(26)	(25)
Capital contributions from Parent		75
Issuances of long-term debt	150	100
Reacquisitions of long-term debt	(36)	(96)
(Repayments) issuances of short-term debt, net	(39)	(16)
Repayment of term loans	(100)
Net other financing activities	(1)	(1)
Net Cash From (Used By) Financing Activities	(52)	37
Net Increase (Decrease) in Cash and Cash Equivalents	3
Cash and Cash Equivalents at Beginning of Period	3	6
CASH AND CASH EQUIVALENTS AT END OF PERIOD	6	6
SUPPLEMENTAL CASH FLOW INFORMATION
Cash received for income taxes (includes payments from PHI for federal income taxes)	$ (3)	$ (21)