Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
CURRENT ASSETS
Cash and cash equivalents	$ 122	$ 23
Restricted cash equivalents	202	13
Accounts receivable, less allowance for uncollectible accounts	872	835
Inventories	142	148
Deferred income tax assets, net	56	51
Income taxes and related accrued interest receivable	8	274
Prepaid expenses and other	62	54
Total Current Assets	1,464	1,398
OTHER ASSETS
Goodwill	1,407	1,407
Regulatory assets	1,990	2,087
Income taxes and related accrued interest receivable	58	75
Restricted cash equivalents	13	14
Other	166	163
Total Other Assets	3,634	3,746
PROPERTY, PLANT AND EQUIPMENT
Property, plant and equipment	14,803	14,567
Accumulated depreciation	(4,897)	(4,863)
Net Property, Plant and Equipment	9,906	9,704
TOTAL ASSETS	15,004	14,848
CURRENT LIABILITIES
Short-term debt	509	565
Current portion of long-term debt and project funding	449	446
Accounts payable	187	215
Accrued liabilities	319	301
Capital lease obligations due within one year	9	9
Taxes accrued	49	56
Interest accrued	81	47
Liabilities and accrued interest related to uncertain tax positions	6	397
Other	303	277
Total Current Liabilities	1,912	2,313
DEFERRED CREDITS
Regulatory liabilities	383	399
Deferred income tax liabilities, net	3,118	2,928
Investment tax credits	17	17
Pension benefit obligation	118	116
Other postretirement benefit obligations	203	206
Liabilities and accrued interest related to uncertain tax positions	6	28
Other	185	189
Total Deferred Credits	4,030	3,883
OTHER LONG-TERM LIABILITIES
Long-term debt	4,452	4,053
Transition bonds issued by ACE Funding	204	214
Long-term project funding	10	10
Capital lease obligations	60	60
Total Other Long-Term Liabilities	4,726	4,337
COMMITMENTS AND CONTINGENCIES
EQUITY
Common stock	3	3
Premium on stock and other capital contributions	3,764	3,751
Accumulated other comprehensive loss	(33)	(34)
Retained earnings	602	595
Total Equity	4,336	4,315
TOTAL LIABILITIES AND EQUITY	15,004	14,848
Potomac Electric Power Co [Member]
CURRENT ASSETS
Cash and cash equivalents	105	9
Restricted cash equivalents	182	3
Accounts receivable, less allowance for uncollectible accounts	360	345
Inventories	66	67
Deferred income tax assets, net	57	48
Income taxes and related accrued interest receivable	94	113
Prepaid expenses and other	21	18
Total Current Assets	885	603
OTHER ASSETS
Regulatory assets	563	563
Prepaid pension expense	327	332
Investment in trust	33	33
Income taxes and related accrued interest receivable	28	36
Other	74	66
Total Other Assets	1,025	1,030
PROPERTY, PLANT AND EQUIPMENT
Property, plant and equipment	7,415	7,310
Accumulated depreciation	(2,787)	(2,772)
Net Property, Plant and Equipment	4,628	4,538
TOTAL ASSETS	6,538	6,171
CURRENT LIABILITIES
Short-term debt		151
Current portion of long-term debt and project funding	175	175
Accounts payable	111	132
Accrued liabilities	97	90
Accounts payable due to associated companies	29	32
Capital lease obligations due within one year	9	9
Taxes accrued	21	34
Interest accrued	38	20
Liabilities and accrued interest related to uncertain tax positions		37
Customer deposits	46	46
Other	86	75
Total Current Liabilities	612	801
DEFERRED CREDITS
Regulatory liabilities	113	113
Deferred income tax liabilities, net	1,465	1,412
Investment tax credits	3	3
Other postretirement benefit obligations	60	61
Liabilities and accrued interest related to uncertain tax positions		10
Other	67	65
Total Deferred Credits	1,708	1,664
OTHER LONG-TERM LIABILITIES
Long-term debt	2,124	1,724
Capital lease obligations	60	60
Total Other Long-Term Liabilities	2,184	1,784
COMMITMENTS AND CONTINGENCIES
EQUITY
Common stock
Premium on stock and other capital contributions	1,010	930
Retained earnings	1,024	992
Total Equity	2,034	1,922
TOTAL LIABILITIES AND EQUITY	6,538	6,171
Delmarva Power & Light Co/De [Member]
CURRENT ASSETS
Cash and cash equivalents	9	2
Restricted cash equivalents	9
Accounts receivable, less allowance for uncollectible accounts	221	208
Inventories	46	51
Deferred income tax assets, net	62	59
Income taxes and related accrued interest receivable	32	32
Prepaid expenses and other	7	9
Total Current Assets	386	361
OTHER ASSETS
Goodwill	8	8
Regulatory assets	314	311
Prepaid pension expense	226	228
Income taxes and related accrued interest receivable	4	4
Other	12	12
Total Other Assets	564	563
PROPERTY, PLANT AND EQUIPMENT
Property, plant and equipment	3,747	3,673
Accumulated depreciation	(1,022)	(1,016)
Net Property, Plant and Equipment	2,725	2,657
TOTAL ASSETS	3,675	3,581
CURRENT LIABILITIES
Short-term debt	282	252
Current portion of long-term debt and project funding	100	100
Accounts payable	35	46
Accrued liabilities	74	71
Accounts payable due to associated companies	20	22
Taxes accrued	5	4
Interest accrued	14	6
Other	71	60
Total Current Liabilities	601	561
DEFERRED CREDITS
Regulatory liabilities	241	229
Deferred income tax liabilities, net	845	816
Investment tax credits	5	5
Other postretirement benefit obligations	22	23
Other	33	36
Total Deferred Credits	1,146	1,109
OTHER LONG-TERM LIABILITIES
Long-term debt	867	867
COMMITMENTS AND CONTINGENCIES
EQUITY
Common stock
Premium on stock and other capital contributions	407	407
Retained earnings	654	637
Total Equity	1,061	1,044
TOTAL LIABILITIES AND EQUITY	3,675	3,581
Atlantic City Electric Co [Member]
CURRENT ASSETS
Cash and cash equivalents	7	3
Restricted cash equivalents	11	10
Accounts receivable, less allowance for uncollectible accounts	191	186
Inventories	28	28
Income taxes and related accrued interest receivable	147	147
Prepaid expenses and other	16	16
Total Current Assets	400	390
OTHER ASSETS
Regulatory assets	478	569
Prepaid pension expense	103	106
Income taxes and related accrued interest receivable	34	34
Restricted cash equivalents	13	14
Other	11	12
Total Other Assets	639	735
PROPERTY, PLANT AND EQUIPMENT
Property, plant and equipment	2,941	2,901
Accumulated depreciation	(755)	(751)
Net Property, Plant and Equipment	2,186	2,150
TOTAL ASSETS	3,225	3,275
CURRENT LIABILITIES
Short-term debt	119	138
Current portion of long-term debt and project funding	149	148
Accounts payable	24	21
Accrued liabilities	107	105
Accounts payable due to associated companies	13	15
Taxes accrued	18	12
Interest accrued	19	13
Customer deposits	20	22
Other	27	23
Total Current Liabilities	496	497
DEFERRED CREDITS
Regulatory liabilities	29	57
Deferred income tax liabilities, net	838	833
Investment tax credits	5	5
Other postretirement benefit obligations	35	35
Other	14	14
Total Deferred Credits	921	944
OTHER LONG-TERM LIABILITIES
Long-term debt	753	753
Transition bonds issued by ACE Funding	204	214
Total Other Long-Term Liabilities	957	967
COMMITMENTS AND CONTINGENCIES
EQUITY
Common stock	26	26
Premium on stock and other capital contributions	651	651
Retained earnings	174	190
Total Equity	851	867
TOTAL LIABILITIES AND EQUITY	$ 3,225	$ 3,275