Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
CURRENT ASSETS
Cash and cash equivalents	$ 23	$ 25
Restricted cash equivalents	13	10
Accounts receivable, less allowance for uncollectible accounts	835	804
Inventories	148	153
Prepayments of income taxes	40	59
Deferred income tax assets, net	51	28
Income taxes receivable	234	69
Prepaid expenses and other	53	81
Assets held for disposition	1	38
Total Current Assets	1,398	1,267
OTHER ASSETS
Goodwill	1,407	1,407
Regulatory assets	2,087	2,614
Income taxes receivable	67	217
Restricted cash equivalents	14	17
Assets and accrued interest related to uncertain tax positions	8	18
Derivative assets		8
Other	163	163
Assets held for disposition		1,237
Total Other Assets	3,746	5,681
PROPERTY, PLANT AND EQUIPMENT
Property, plant and equipment	14,567	13,625
Accumulated depreciation	(4,863)	(4,779)
Net Property, Plant and Equipment	9,704	8,846
TOTAL ASSETS	14,848	15,794
CURRENT LIABILITIES
Short-term debt	565	965
Current portion of long-term debt	446	569
Accounts payable	215	196
Accrued liabilites	301	357
Capital lease obligations due within one year	9	8
Taxes accrued	56	75
Interest accrued	47	47
Liabilities and accrued interest related to uncertain tax positions	397	9
Derivative liabilities		4
Other	276	272
Liabilities associated with assets held for disposition	1	41
Total Current Liabilities	2,313	2,543
DEFERRED CREDITS
Regulatory liabilities	399	501
Deferred income tax liabilities, net	2,928	3,208
Investment tax credits	17	20
Pension benefit obligation	116	449
Other postretirement benefit obligations	206	454
Liabilities and accrued interest related to uncertain tax positions	28	15
Derivative liabilities		11
Other	189	191
Liabilities associated with assets held for disposition		2
Total Deferred Credits	3,883	4,851
OTHER LONG-TERM LIABILITIES
Long-term debt	4,053	3,648
Transition bonds issued by ACE Funding	214	256
Long-term project funding	10	12
Capital lease obligations	60	70
Total Other Long-Term Liabilities	4,337	3,986
COMMITMENTS AND CONTINGENCIES
EQUITY
Common stock	3	2
Premium on stock and other capital contributions	3,751	3,383
Accumulated other comprehensive loss	(34)	(48)
Retained earnings	595	1,077
Total Equity	4,315	4,414
TOTAL LIABILITIES AND EQUITY	14,848	15,794
Potomac Electric Power Co [Member]
CURRENT ASSETS
Cash and cash equivalents	9	9
Restricted cash equivalents	3
Accounts receivable, less allowance for uncollectible accounts	345	318
Inventories	67	69
Prepayments of income taxes	9	9
Deferred income tax assets, net	48	9
Income taxes receivable	104	31
Prepaid expenses and other	18	16
Total Current Assets	603	461
OTHER ASSETS
Regulatory assets	563	487
Prepaid pension expense	332	353
Investment in trust	33	31
Income taxes receivable	36	102
Other	66	59
Total Other Assets	1,030	1,032
PROPERTY, PLANT AND EQUIPMENT
Property, plant and equipment	7,310	6,850
Accumulated depreciation	(2,772)	(2,705)
Net Property, Plant and Equipment	4,538	4,145
TOTAL ASSETS	6,171	5,638
CURRENT LIABILITIES
Short-term debt	151	231
Current portion of long-term debt	175	200
Accounts payable	132	110
Accrued liabilites	90	104
Accounts payable due to associated companies	32	41
Capital lease obligations due within one year	9	8
Taxes accrued	34	58
Interest accrued	20	17
Liabilities and accrued interest related to uncertain tax positions	37
Customer deposits	46	48
Other	75	58
Total Current Liabilities	801	875
DEFERRED CREDITS
Regulatory liabilities	113	141
Deferred income tax liabilities, net	1,412	1,219
Investment tax credits	3	4
Other postretirement benefit obligations	61	66
Liabilities and accrued interest related to uncertain tax positions	10	53
Other	65	66
Total Deferred Credits	1,664	1,549
OTHER LONG-TERM LIABILITIES
Long-term debt	1,724	1,501
Capital lease obligations	60	70
Total Other Long-Term Liabilities	1,784	1,571
COMMITMENTS AND CONTINGENCIES
EQUITY
Common stock
Premium on stock and other capital contributions	930	755
Retained earnings	992	888
Total Equity	1,922	1,643
TOTAL LIABILITIES AND EQUITY	6,171	5,638
Delmarva Power & Light Co/De [Member]
CURRENT ASSETS
Cash and cash equivalents	2	6
Accounts receivable, less allowance for uncollectible accounts	208	201
Inventories	51	53
Prepayments of income taxes	10	10
Deferred income tax assets, net	59	11
Income taxes receivable	5	10
Assets and accrued interest related to uncertain tax positions	17
Prepaid expenses and other	9	9
Total Current Assets	361	300
OTHER ASSETS
Goodwill	8	8
Regulatory assets	311	288
Prepaid pension expense	228	232
Assets and accrued interest related to uncertain tax positions	3	20
Other	13	12
Total Other Assets	563	560
PROPERTY, PLANT AND EQUIPMENT
Property, plant and equipment	3,673	3,422
Accumulated depreciation	(1,016)	(1,000)
Net Property, Plant and Equipment	2,657	2,422
TOTAL ASSETS	3,581	3,282
CURRENT LIABILITIES
Short-term debt	252	137
Current portion of long-term debt	100	250
Accounts payable	46	40
Accrued liabilites	71	85
Accounts payable due to associated companies	22	20
Taxes accrued	4	4
Interest accrued	6	6
Derivative liabilities		4
Other	60	61
Total Current Liabilities	561	607
DEFERRED CREDITS
Regulatory liabilities	229	258
Deferred income tax liabilities, net	816	697
Investment tax credits	5	5
Other postretirement benefit obligations	23	22
Other	36	41
Total Deferred Credits	1,109	1,023
OTHER LONG-TERM LIABILITIES
Long-term debt	867	667
COMMITMENTS AND CONTINGENCIES
EQUITY
Common stock
Premium on stock and other capital contributions	407	407
Retained earnings	637	578
Total Equity	1,044	985
TOTAL LIABILITIES AND EQUITY	3,581	3,282
Atlantic City Electric Co [Member]
CURRENT ASSETS
Cash and cash equivalents	3	6
Restricted cash equivalents	10	10
Accounts receivable, less allowance for uncollectible accounts	186	192
Inventories	28	30
Prepayments of income taxes	17	27
Deferred income tax assets, net	15	10
Income taxes receivable	118	5
Assets and accrued interest related to uncertain tax positions	12
Prepaid expenses and other	16	11
Total Current Assets	390	281
OTHER ASSETS
Regulatory assets	569	694
Prepaid pension expense	106	88
Income taxes receivable	29	133
Restricted cash equivalents	14	17
Assets and accrued interest related to uncertain tax positions	5	12
Derivative assets		8
Other	12	12
Total Other Assets	735	964
PROPERTY, PLANT AND EQUIPMENT
Property, plant and equipment	2,901	2,771
Accumulated depreciation	(751)	(787)
Net Property, Plant and Equipment	2,150	1,984
TOTAL ASSETS	3,275	3,229
CURRENT LIABILITIES
Short-term debt	138	133
Current portion of long-term debt	148	108
Accounts payable	21	26
Accrued liabilites	105	121
Accounts payable due to associated companies	15	14
Taxes accrued	12	10
Interest accrued	13	15
Customer deposits	22	25
Other	23	22
Total Current Liabilities	497	474
DEFERRED CREDITS
Regulatory liabilities	57	102
Deferred income tax liabilities, net	833	766
Investment tax credits	5	6
Other postretirement benefit obligations	35	34
Derivative liabilities		11
Other	14	18
Total Deferred Credits	944	937
OTHER LONG-TERM LIABILITIES
Long-term debt	753	760
Transition bonds issued by ACE Funding	214	256
Total Other Long-Term Liabilities	967	1,016
COMMITMENTS AND CONTINGENCIES
EQUITY
Common stock	26	26
Premium on stock and other capital contributions	651	576
Retained earnings	190	200
Total Equity	867	802
TOTAL LIABILITIES AND EQUITY	$ 3,275	$ 3,229