Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
OPERATING ACTIVITIES
Net Income	$ 106	$ 128
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	316	265
Deferred income taxes	74	225
Gains on sales of land		(8)
Other	(1)	(7)
Changes in:
Accounts receivable	(174)	8
Inventories	(9)	(1)
Prepaid expenses	(15)	(26)
Regulatory assets and liabilities, net	(41)	(51)
Accounts payable and accrued liabilities	14	(5)
Pension benefit obligation, excluding contributions	36	23
Cash collateral related to derivative activities	5	(5)
Income tax-related prepayments, receivables and payables	4	(135)
Interest accrued	3	3
Other assets and liabilities	21	5
Net Cash From Operating Activities	339	419
INVESTING ACTIVITIES
Investment in property, plant and equipment	(562)	(553)
Department of Energy capital reimbursement awards received		4
Proceeds from sales of land		8
Changes in restricted cash equivalents	12	(8)
Net other investing activities	(2)	3
Net Cash Used By Investing Activities	(552)	(546)
FINANCING ACTIVITIES
Dividends paid on common stock	(137)	(136)
Common stock issued for the Direct Stock Purchase and Dividend Reinvestment Plan and employee-related compensation	19	26
Issuance of Series A preferred stock	36	90
Issuances of long-term debt	408	608
Reacquisitions of long-term debt	(133)	(206)
Issuances (repayments) of short-term debt, net	69	(86)
Cost of issuances	(6)	(8)
Net other financing activities	(23)
Net Cash From (Used by) Financing Activities	233	288
Net Increase in Cash and Cash Equivalents	20	161
Cash and Cash Equivalents at Beginning of Period	14	23
CASH AND CASH EQUIVALENTS AT END OF PERIOD	34	184
SUPPLEMENTAL CASH FLOW INFORMATION
Cash (received) paid for income taxes (includes payments from PHI for federal income taxes)	(13)	(2)
Potomac Electric Power Co [Member]
OPERATING ACTIVITIES
Net Income	68	78
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	133	112
Deferred income taxes	30	68
Gains on sales of land		(8)
Changes in:
Accounts receivable	(97)
Inventories	(4)
Prepaid expenses	12	10
Regulatory assets and liabilities, net	(43)	(61)
Accounts payable and accrued liabilities	(8)	(28)
Pension benefit obligation, excluding contributions	12	8
Income tax-related prepayments, receivables and payables	(1)	(29)
Interest accrued	2	2
Other assets and liabilities	1	(3)
Net Cash From Operating Activities	105	149
INVESTING ACTIVITIES
Investment in property, plant and equipment	(254)	(241)
Department of Energy capital reimbursement awards received		3
Proceeds from sales of land		8
Changes in restricted cash equivalents	3	(4)
Net other investing activities	3	1
Net Cash Used By Investing Activities	(248)	(233)
FINANCING ACTIVITIES
Dividends paid on common stock	(31)	(46)
Capital contribution from Parent	112	80
Issuances of long-term debt	208	404
Reacquisitions of long-term debt	(12)	(175)
Issuances (repayments) of short-term debt, net	(104)	(151)
Cost of issuances	(4)	(7)
Net other financing activities	(10)	(3)
Net Cash From (Used by) Financing Activities	159	102
Net Increase in Cash and Cash Equivalents	16	18
Cash and Cash Equivalents at Beginning of Period	6	9
CASH AND CASH EQUIVALENTS AT END OF PERIOD	22	27
SUPPLEMENTAL CASH FLOW INFORMATION
Cash (received) paid for income taxes (includes payments from PHI for federal income taxes)		(2)
Delmarva Power & Light Co/De [Member]
OPERATING ACTIVITIES
Net Income	40	56
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	75	60
Deferred income taxes	26	38
Changes in:
Accounts receivable	(30)	21
Inventories	(1)	(2)
Regulatory assets and liabilities, net	(7)	(17)
Accounts payable and accrued liabilities	(2)	(6)
Income tax-related prepayments, receivables and payables		(1)
Interest accrued	1	1
Other assets and liabilities	13	5
Net Cash From Operating Activities	115	155
INVESTING ACTIVITIES
Investment in property, plant and equipment	(154)	(172)
Changes in restricted cash equivalents	5	(5)
Net other investing activities	1	3
Net Cash Used By Investing Activities	(148)	(174)
FINANCING ACTIVITIES
Dividends paid on common stock	(62)	(20)
Capital contribution from Parent	75	130
Issuances of long-term debt	200	204
Reacquisitions of long-term debt	(100)
Issuances (repayments) of short-term debt, net	(76)	(147)
Cost of issuances	(2)	(1)
Net Cash From (Used by) Financing Activities	35	166
Net Increase in Cash and Cash Equivalents	2	147
Cash and Cash Equivalents at Beginning of Period	4	2
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 6	$ 149
SUPPLEMENTAL CASH FLOW INFORMATION
Cash (received) paid for income taxes (includes payments from PHI for federal income taxes)
Atlantic City Electric Co [Member]
OPERATING ACTIVITIES
Net Income	$ 14	$ 16
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	86	75
Deferred income taxes	9	11
Changes in:
Accounts receivable	(49)	9
Prepaid expenses	(33)	(36)
Regulatory assets and liabilities, net	10	29
Accounts payable and accrued liabilities	34	(4)
Income tax-related prepayments, receivables and payables	8	4
Other assets and liabilities	4	7
Net Cash From Operating Activities	83	111
INVESTING ACTIVITIES
Investment in property, plant and equipment	(138)	(104)
Department of Energy capital reimbursement awards received		1
Net other investing activities	(2)
Net Cash Used By Investing Activities	(140)	(103)
FINANCING ACTIVITIES
Dividends paid on common stock	(12)	(26)
Reacquisitions of long-term debt	(21)	(20)
Issuances (repayments) of short-term debt, net	91	41
Net Cash From (Used by) Financing Activities	58	(5)
Net Increase in Cash and Cash Equivalents	1	3
Cash and Cash Equivalents at Beginning of Period	2	3
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 3	$ 6
SUPPLEMENTAL CASH FLOW INFORMATION
Cash (received) paid for income taxes (includes payments from PHI for federal income taxes)