Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
CURRENT ASSETS
Cash and cash equivalents	$ 14	$ 23
Restricted cash equivalents	25	13
Accounts receivable, less allowance for uncollectible accounts	782	835
Inventories	141	148
Deferred income tax assets, net	50	51
Income taxes and related accrued interest receivable	9	274
Prepaid expenses and other	63	54
Total Current Assets	1,084	1,398
OTHER ASSETS
Goodwill	1,407	1,407
Regulatory assets	2,409	2,087
Income taxes and related accrued interest receivable	81	75
Restricted cash equivalents	14	14
Other	166	163
Total Other Assets	4,077	3,746
PROPERTY, PLANT AND EQUIPMENT
Property, plant and equipment	15,465	14,567
Accumulated depreciation	(4,959)	(4,863)
Net Property, Plant and Equipment	10,506	9,704
TOTAL ASSETS	15,667	14,848
CURRENT LIABILITIES
Short-term debt	729	565
Current portion of long-term debt and project funding	431	446
Accounts payable	174	215
Accrued liabilities	313	301
Capital lease obligations due within one year	10	9
Taxes accrued	41	56
Interest accrued	47	47
Liabilities and accrued interest related to uncertain tax positions	6	397
Other	314	277
Total Current Liabilities	2,065	2,313
DEFERRED CREDITS
Regulatory liabilities	343	399
Deferred income tax liabilities, net	3,266	2,928
Investment tax credits	16	17
Pension benefit obligation	396	116
Other postretirement benefit obligations	265	206
Liabilities and accrued interest related to uncertain tax positions	2	28
Other	193	189
Total Deferred Credits	4,481	3,883
OTHER LONG-TERM LIABILITIES
Long-term debt	4,441	4,053
Transition bonds issued by ACE Funding	171	214
Long-term project funding	8	10
Capital lease obligations	50	60
Total Other Long-Term Liabilities	4,670	4,337
COMMITMENTS AND CONTINGENCIES
PREFERRED STOCK
Series A preferred stock, $.01 par value, 18,000 shares authorized, 12,600 and zero shares outstanding, respectively	129
EQUITY
Common stock	3	3
Premium on stock and other capital contributions	3,800	3,751
Accumulated other comprehensive loss	(46)	(34)
Retained earnings	565	595
Total Equity	4,322	4,315
TOTAL LIABILITIES AND EQUITY	15,667	14,848
Potomac Electric Power Co [Member]
CURRENT ASSETS
Cash and cash equivalents	6	9
Restricted cash equivalents	5	3
Accounts receivable, less allowance for uncollectible accounts	315	345
Inventories	62	67
Deferred income tax assets, net	14	48
Income taxes and related accrued interest receivable	94	113
Prepaid expenses and other	21	18
Total Current Assets	517	603
OTHER ASSETS
Regulatory assets	697	563
Prepaid pension expense	316	332
Investment in trust	34	33
Income taxes and related accrued interest receivable	30	36
Other	71	66
Total Other Assets	1,148	1,030
PROPERTY, PLANT AND EQUIPMENT
Property, plant and equipment	7,764	7,310
Accumulated depreciation	(2,816)	(2,772)
Net Property, Plant and Equipment	4,948	4,538
TOTAL ASSETS	6,613	6,171
CURRENT LIABILITIES
Short-term debt	104	151
Current portion of long-term debt and project funding	12	175
Accounts payable	94	132
Accrued liabilities	91	90
Accounts payable due to associated companies	30	32
Capital lease obligations due within one year	10	9
Taxes accrued	32	34
Interest accrued	19	20
Liabilities and accrued interest related to uncertain tax positions		37
Customer deposits	44	46
Other	102	75
Total Current Liabilities	538	801
DEFERRED CREDITS
Regulatory liabilities	104	113
Deferred income tax liabilities, net	1,584	1,412
Investment tax credits	2	3
Other postretirement benefit obligations	57	61
Liabilities and accrued interest related to uncertain tax positions		10
Other	67	65
Total Deferred Credits	1,814	1,664
OTHER LONG-TERM LIABILITIES
Long-term debt	2,124	1,724
Capital lease obligations	50	60
Total Other Long-Term Liabilities	2,174	1,784
COMMITMENTS AND CONTINGENCIES
EQUITY
Common stock
Premium on stock and other capital contributions	1,010	930
Retained earnings	1,077	992
Total Equity	2,087	1,922
TOTAL LIABILITIES AND EQUITY	6,613	6,171
Delmarva Power & Light Co/De [Member]
CURRENT ASSETS
Cash and cash equivalents	4	2
Restricted cash equivalents	5
Accounts receivable, less allowance for uncollectible accounts	193	208
Inventories	55	51
Deferred income tax assets, net	16	59
Income taxes and related accrued interest receivable	34	32
Prepaid expenses and other	12	9
Total Current Assets	319	361
OTHER ASSETS
Goodwill	8	8
Regulatory assets	356	311
Prepaid pension expense	220	228
Income taxes and related accrued interest receivable	4	4
Other	12	12
Total Other Assets	600	563
PROPERTY, PLANT AND EQUIPMENT
Property, plant and equipment	3,946	3,673
Accumulated depreciation	(1,021)	(1,016)
Net Property, Plant and Equipment	2,925	2,657
TOTAL ASSETS	3,844	3,581
CURRENT LIABILITIES
Short-term debt	211	252
Current portion of long-term debt and project funding	100	100
Accounts payable	39	46
Accrued liabilities	74	71
Accounts payable due to associated companies	17	22
Taxes accrued	3	4
Interest accrued	7	6
Customer deposits	24	25
Other	42	35
Total Current Liabilities	517	561
DEFERRED CREDITS
Regulatory liabilities	225	229
Deferred income tax liabilities, net	893	816
Investment tax credits	4	5
Other postretirement benefit obligations	21	23
Other	35	36
Total Deferred Credits	1,178	1,109
OTHER LONG-TERM LIABILITIES
Long-term debt	971	867
COMMITMENTS AND CONTINGENCIES
EQUITY
Common stock
Premium on stock and other capital contributions	537	407
Retained earnings	641	637
Total Equity	1,178	1,044
TOTAL LIABILITIES AND EQUITY	3,844	3,581
Atlantic City Electric Co [Member]
CURRENT ASSETS
Cash and cash equivalents	2	3
Restricted cash equivalents	10	10
Accounts receivable, less allowance for uncollectible accounts	167	186
Inventories	23	28
Deferred income tax assets, net	10	15
Income taxes and related accrued interest receivable	151	147
Prepaid expenses and other	13	16
Total Current Assets	366	390
OTHER ASSETS
Regulatory assets	427	569
Prepaid pension expense	96	106
Income taxes and related accrued interest receivable	34	34
Restricted cash equivalents	14	14
Other	12	12
Total Other Assets	583	735
PROPERTY, PLANT AND EQUIPMENT
Property, plant and equipment	3,073	2,901
Accumulated depreciation	(760)	(751)
Net Property, Plant and Equipment	2,313	2,150
TOTAL ASSETS	3,262	3,275
CURRENT LIABILITIES
Short-term debt	127	138
Current portion of long-term debt and project funding	59	148
Accounts payable	20	21
Accrued liabilities	103	105
Accounts payable due to associated companies	15	15
Taxes accrued	1	12
Interest accrued	13	13
Customer deposits	21	22
Other	22	23
Total Current Liabilities	381	497
DEFERRED CREDITS
Regulatory liabilities	14	57
Deferred income tax liabilities, net	865	833
Investment tax credits	5	5
Other postretirement benefit obligations	36	35
Other	16	14
Total Deferred Credits	936	944
OTHER LONG-TERM LIABILITIES
Long-term debt	888	753
Transition bonds issued by ACE Funding	171	214
Total Other Long-Term Liabilities	1,059	967
COMMITMENTS AND CONTINGENCIES
EQUITY
Common stock	26	26
Premium on stock and other capital contributions	651	651
Retained earnings	209	190
Total Equity	886	867
TOTAL LIABILITIES AND EQUITY	$ 3,262	$ 3,275