Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions		Sep. 30, 2017	Dec. 31, 2016
Assets, Current [Abstract]
Cash and cash equivalents		$ 1,203	$ 635
Restricted cash and cash equivalents		320	253
Accounts receivable, net
Customer		3,854	4,158
Other		950	1,201
Mark-to-market derivative assets		699	917
Unamortized energy contract assets		81	88
Energy Related Inventory, Other Fossil Fuel		387	364
Inventories, net
Materials and supplies		1,281	1,274
Prepaid Taxes		1,250	1,250
Regulatory assets		1,264	1,342
Other		1,435	930
Total current assets		12,724	12,412
Property, plant and equipment, net		73,067	71,555
Deferred debits and other assets
Regulatory assets		10,238	10,046
Nuclear decommissioning trust funds		12,966	11,061
Investments		634	629
Goodwill		6,677	6,677
Mark-to-market derivative assets		426	492
Pledged assets for Zion Station decommissioning		57	113
Unamortized energy contract assets		407	447
Other		1,277	1,472
Total deferred debits and other assets		32,682	30,937
Total assets		118,473	114,904
Liabilities, Current [Abstract]
Short-term borrowings		710	1,267
Long-term debt due within one year		3,164	2,430
Accounts payable		3,132	3,441
Accrued expenses		3,080	3,460
Payables to affiliates		5	8
Unamortized energy contract liabilities		283	407
Regulatory liabilities		553	602
Mark-to-market derivative liabilities (current liabilities)		178	282
Energy Marketing Accounts Payable		261	428
Accounts Payable and Accrued Liabilities, Current		96	151
Other		933	981
Total current liabilities		12,395	13,457
Long-term debt		31,701	31,575
Long-term debt to financing trusts		389	641
Deferred credits and other liabilities
Deferred Income Taxes and Other Tax Liabilities, Noncurrent		19,250	18,138
Asset Retirement Obligations, Noncurrent		9,733	9,111
Pension obligations		4,055	4,248
Non-pension postretirement benefit obligations		1,977	1,848
Spent nuclear fuel obligation		1,142	1,024
Regulatory liabilities		4,549	4,187
Mark-to-market derivative liabilities (noncurrent liabilities)		410	392
Unamortized energy contract liabilities		656	830
Payable for Zion Station decommissioning		0	14
Other		1,899	1,827
Total deferred credits and other liabilities		43,671	41,619
Total liabilities	[1]	88,156	87,292
Commitments and contingencies
Stockholders' Equity Attributable to Parent [Abstract]
Common stock		18,862	18,794
Treasury stock, at cost (2 shares and 35 shares at September 30, 2017 and December 31, 2016, respectively)		(123)	(2,327)
Retained earnings		11,950	12,030
Accumulated other comprehensive loss, net		(2,589)	(2,660)
Total shareholders’ equity		28,100	25,837
Member’s equity
Noncontrolling interests		2,217	1,775
Total equity		30,317	27,612
Total liabilities and shareholders’ equity		118,473	114,904
Variable Interest Entity, Nonconsolidated, Carrying Amount, Liabilities	[2]	268	502
Variable Interest Entity, Primary Beneficiary [Member]
Assets, Current [Abstract]
Cash and cash equivalents	[3]	130	150	[4]
Restricted cash and cash equivalents	[3]	85	59	[4]
Accounts receivable, net
Customer	[3]	139	371	[4]
Other	[3]	25	48	[4]
Mark-to-market derivative assets	[3]	0	31	[4]
Inventories, net
Materials and supplies	[3]	196	199	[4]
Other	[3]	56	50	[4]
Total current assets	[3]	631	908	[4]
Property, plant and equipment, net	[3]	6,213	5,415	[4]
Deferred debits and other assets
Nuclear decommissioning trust funds	[3]	2,415	2,185	[4]
Goodwill	[3]	0	47	[4]
Mark-to-market derivative assets	[3]	0	23	[4]
Other	[3]	261	315	[4]
Total assets	[3]	9,520	8,893	[4]
Liabilities, Current [Abstract]
Long-term debt due within one year	[3]	182	181	[4]
Accounts payable	[3]	104	269	[4]
Accrued expenses	[3]	90	119	[4]
Unamortized energy contract liabilities	[3]	17	15	[4]
Mark-to-market derivative liabilities (current liabilities)	[3]	0	60	[4]
Other	[3]	11	30	[4]
Total current liabilities	[3]	404	674	[4]
Long-term debt	[3]	1,172	641	[4]
Deferred credits and other liabilities
Asset Retirement Obligations, Noncurrent	[3]	2,009	1,904	[4]
Pension obligations	[3],[5]	0	9	[4]
Unamortized energy contract liabilities	[3]	9	22	[4]
Other	[3]	94	106	[4]
Total liabilities	[3]	3,688	3,356	[4]
Variable Interest Entity, Primary Beneficiary, Aggregated Disclosure [Member]
Deferred debits and other assets
Total assets		9,520	8,893
Deferred credits and other liabilities
Total liabilities		3,688	3,356
Exelon Generation Co L L C [Member]
Assets, Current [Abstract]
Cash and cash equivalents		360	290
Restricted cash and cash equivalents		186	158
Accounts receivable, net
Customer		2,339	2,433
Other		275	558
Mark-to-market derivative assets		699	917
Receivables from affiliates		127	156
Unamortized energy contract assets		81	88
Energy Related Inventory, Other Fossil Fuel		298	292
Inventories, net
Materials and supplies		917	935
Other		1,157	701
Total current assets		6,439	6,528
Property, plant and equipment, net		24,793	25,585
Deferred debits and other assets
Nuclear decommissioning trust funds		12,966	11,061
Investments		429	418
Goodwill		47	47
Mark-to-market derivative assets		416	476
Prepaid pension asset		1,535	1,595
Pledged assets for Zion Station decommissioning		57	113
Unamortized energy contract assets		406	447
Deferred Tax Assets, Net, Noncurrent		8	16
Other		648	688
Total deferred debits and other assets		16,512	14,861
Total assets		47,744	46,974
Liabilities, Current [Abstract]
Short-term borrowings		92	699
Long-term debt due within one year		1,659	1,117
Accounts payable		1,492	1,610
Accrued expenses		797	989
Payables to affiliates		136	137
Unamortized energy contract liabilities		52	72
Other Short-term Borrowings		146	55
Mark-to-market derivative liabilities (current liabilities)		158	263
Energy Marketing Accounts Payable		261	428
Other		266	313
Total current liabilities		5,059	5,683
Long-term debt		6,956	7,202
Long-term debt to affiliate		913	922
Deferred credits and other liabilities
Deferred Income Taxes and Other Tax Liabilities, Noncurrent		5,596	5,585
Asset Retirement Obligations, Noncurrent		9,548	8,922
Non-pension postretirement benefit obligations		919	930
Spent nuclear fuel obligation		1,142	1,024
Due to Affiliate, Noncurrent		2,972	2,608
Mark-to-market derivative liabilities (noncurrent liabilities)		153	153
Unamortized energy contract liabilities		57	80
Payable for Zion Station decommissioning		0	14
Other		632	595
Total deferred credits and other liabilities		21,019	19,911
Total liabilities	[6]	33,947	33,718
Commitments and contingencies
Stockholders' Equity Attributable to Parent [Abstract]
Retained earnings		2,260	2,275
Accumulated other comprehensive loss, net		(36)	(54)
Member’s equity
Members' Capital		9,357	9,261
Total member's equity		11,581	11,482
Noncontrolling interests		2,216	1,774
Total equity		13,797	13,256
Total liabilities and shareholders’ equity		47,744	46,974
Exelon Generation Co L L C [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Assets, Current [Abstract]
Cash and cash equivalents		130	150
Restricted cash and cash equivalents		76	27
Accounts receivable, net
Customer		139	371
Other		25	48
Mark-to-market derivative assets		0	31
Inventories, net
Materials and supplies		196	199
Other		52	44
Total current assets		618	870
Property, plant and equipment, net		6,213	5,415
Deferred debits and other assets
Nuclear decommissioning trust funds		2,415	2,185
Goodwill		0	47
Mark-to-market derivative assets		0	23
Other		231	277
Total assets		9,477	8,817
Liabilities, Current [Abstract]
Long-term debt due within one year		146	99
Accounts payable		104	269
Accrued expenses		89	116
Unamortized energy contract liabilities		17	15
Mark-to-market derivative liabilities (current liabilities)		0	60
Other		11	30
Total current liabilities		367	589
Long-term debt		1,097	540
Deferred credits and other liabilities
Asset Retirement Obligations, Noncurrent		2,009	1,904
Pension obligations	[5]	0	9
Unamortized energy contract liabilities		9	22
Other		94	106
Total liabilities		3,576	3,170
Exelon Generation Co L L C [Member] | Variable Interest Entity, Primary Beneficiary, Aggregated Disclosure [Member]
Deferred debits and other assets
Total assets		9,477	8,817
Deferred credits and other liabilities
Total liabilities		3,576	3,170
Commonwealth Edison Co [Member]
Assets, Current [Abstract]
Cash and cash equivalents		257	56
Restricted cash and cash equivalents		52	2
Accounts receivable, net
Customer		496	528
Other		172	218
Receivables from affiliates		18	356
Inventories, net
Inventories, net		152	159
Regulatory assets		187	190
Other		67	45
Total current assets		1,401	1,554
Property, plant and equipment, net		20,353	19,335
Deferred debits and other assets
Regulatory assets		1,387	977
Investments		6	6
Goodwill		2,625	2,625
Receivable from affiliate		2,438	2,170
Prepaid pension asset		1,236	1,343
Other		203	325
Total deferred debits and other assets		7,895	7,446
Total assets		29,649	28,335
Liabilities, Current [Abstract]
Long-term debt due within one year		840	425
Accounts payable		579	645
Accrued expenses		305	1,250
Payables to affiliates		51	65
Customer deposits		114	121
Regulatory liabilities		249	329
Mark-to-market derivative liabilities (current liabilities)		20	19
Other		88	84
Total current liabilities		2,246	2,938
Long-term debt		6,760	6,608
Long-term debt to financing trusts		205	205
Deferred credits and other liabilities
Deferred Income Taxes and Other Tax Liabilities, Noncurrent		6,091	5,364
Asset Retirement Obligations, Noncurrent		110	119
Non-pension postretirement benefit obligations		224	239
Regulatory liabilities		3,735	3,369
Mark-to-market derivative liabilities (noncurrent liabilities)		257	239
Other		577	529
Total deferred credits and other liabilities		10,994	9,859
Total liabilities		20,205	19,610
Commitments and contingencies
Stockholders' Equity Attributable to Parent [Abstract]
Common stock		1,588	1,588
Retained earnings		(1,639)	(1,639)
Other paid-in capital		6,738	6,150
Retained Earnings, Appropriated		2,757	2,626
Total shareholders’ equity		9,444	8,725
Member’s equity
Total liabilities and shareholders’ equity		29,649	28,335
PECO Energy Co [Member]
Assets, Current [Abstract]
Cash and cash equivalents		330	63
Restricted cash and cash equivalents		4	4
Accounts receivable, net
Customer		240	306
Other		125	131
Receivables from affiliates		0	4
Receivable from Exelon intercompany pool		57	131
Energy Related Inventory, Other Fossil Fuel		36	35
Inventories, net
Materials and supplies		31	27
Prepaid Taxes		41	9
Regulatory assets		36	29
Other		16	18
Total current assets		916	757
Property, plant and equipment, net		7,875	7,565
Deferred debits and other assets
Regulatory assets		1,773	1,681
Investments		24	25
Receivable from affiliate		533	438
Prepaid pension asset		347	345
Other		12	20
Total deferred debits and other assets		2,689	2,509
Total assets		11,480	10,831
Liabilities, Current [Abstract]
Long-term debt due within one year		500	0
Accounts payable		285	342
Accrued expenses		132	104
Payables to affiliates		48	63
Customer deposits		64	61
Regulatory liabilities		159	127
Other		28	30
Total current liabilities		1,216	727
Long-term debt		2,402	2,580
Long-term debt to financing trusts		184	184
Deferred credits and other liabilities
Deferred Income Taxes and Other Tax Liabilities, Noncurrent		3,170	3,006
Asset Retirement Obligations, Noncurrent		27	28
Non-pension postretirement benefit obligations		289	289
Regulatory liabilities		560	517
Other		90	85
Total deferred credits and other liabilities		4,136	3,925
Total liabilities		7,938	7,416
Commitments and contingencies
Stockholders' Equity Attributable to Parent [Abstract]
Common stock		2,489	2,473
Retained earnings		1,052	941
Accumulated other comprehensive loss, net		1	1
Total shareholders’ equity		3,542	3,415
Member’s equity
Total liabilities and shareholders’ equity		11,480	10,831
Baltimore Gas and Electric Company [Member]
Assets, Current [Abstract]
Cash and cash equivalents		29	23
Restricted cash and cash equivalents		1	24
Accounts receivable, net
Customer		288	395
Other		86	102
Inventories, net
Energy Related Inventory, Natural Gas in Storage		46	30
Materials and supplies		40	38
Prepaid Taxes		0	15
Regulatory assets		208	208
Other		4	7
Total current assets		702	842
Property, plant and equipment, net		7,418	7,040
Deferred debits and other assets
Regulatory assets		497	504
Investments		5	12
Prepaid pension asset		297	297
Other		4	9
Total deferred debits and other assets		803	822
Total assets	[7]	8,923	8,704
Liabilities, Current [Abstract]
Short-term borrowings		0	45
Long-term debt due within one year		0	41
Accounts payable		218	205
Accrued expenses		147	175
Payables to affiliates		42	55
Customer deposits		114	110
Regulatory liabilities		63	50
Other		28	26
Total current liabilities		612	707
Long-term debt		2,577	2,281
Long-term debt to financing trusts		0	252
Deferred credits and other liabilities
Deferred Income Taxes and Other Tax Liabilities, Noncurrent		2,366	2,219
Asset Retirement Obligations, Noncurrent		23	21
Non-pension postretirement benefit obligations		201	205
Regulatory liabilities		84	110
Other		52	61
Total deferred credits and other liabilities		2,726	2,616
Total liabilities	[7]	5,915	5,856
Stockholders' Equity Attributable to Parent [Abstract]
Common stock		1,498	1,421
Retained earnings		1,510	1,427
Total shareholders’ equity		3,008	2,848
Member’s equity
Total liabilities and shareholders’ equity		8,923	8,704
Baltimore Gas and Electric Company [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Assets, Current [Abstract]
Cash and cash equivalents			0
Restricted cash and cash equivalents			23
Accounts receivable, net
Customer			0
Other			0
Mark-to-market derivative assets			0
Inventories, net
Materials and supplies			0
Other			0
Total current assets			23
Property, plant and equipment, net			0
Deferred debits and other assets
Nuclear decommissioning trust funds			0
Goodwill			0
Mark-to-market derivative assets			0
Other			3
Total assets			26
Liabilities, Current [Abstract]
Long-term debt due within one year			41
Accounts payable			0
Accrued expenses			1
Unamortized energy contract liabilities			0
Mark-to-market derivative liabilities (current liabilities)			0
Other			0
Total current liabilities			42
Long-term debt			0
Deferred credits and other liabilities
Asset Retirement Obligations, Noncurrent			0
Pension obligations	[5]		0
Unamortized energy contract liabilities			0
Other			0
Total liabilities			42
Baltimore Gas and Electric Company [Member] | Variable Interest Entity, Primary Beneficiary, Aggregated Disclosure [Member]
Deferred debits and other assets
Total assets			26
Deferred credits and other liabilities
Total liabilities			42
Pepco Holdings LLC [Member] | Successor [Member]
Assets, Current [Abstract]
Cash and cash equivalents		137	170
Restricted cash and cash equivalents		43	43
Accounts receivable, net
Customer		490	496
Other		209	283
Mark-to-market derivative assets		0	0
Inventories, net
Energy Related Inventory, Natural Gas in Storage		9	6
Materials and supplies		141	116
Regulatory assets		568	653
Other		59	71
Total current assets		1,656	1,838
Property, plant and equipment, net		12,219	11,598
Deferred debits and other assets
Regulatory assets		2,692	2,851
Investments		132	133
Goodwill		4,005	4,005
Notes, Loans and Financing Receivable, Gross, Noncurrent		4	4
Mark-to-market derivative assets		0	0
Prepaid pension asset		510	509
Deferred Tax Assets, Net, Noncurrent		6	6
Other		77	81
Total deferred debits and other assets		7,426	7,589
Total assets	[8]	21,301	21,025
Liabilities, Current [Abstract]
Short-term borrowings		118	522
Long-term debt due within one year		159	253
Accounts payable		397	458
Accrued expenses		294	272
Payables to affiliates		79	94
Unamortized energy contract liabilities		231	335
Customer deposits		119	123
Regulatory liabilities		65	79
Other Short-term Borrowings		1
Mark-to-market derivative liabilities (current liabilities)		0	0
Payables to Customers		53	101
Other		41	47
Total current liabilities		1,557	2,284
Long-term debt		5,771	5,645
Deferred credits and other liabilities
Deferred Income Taxes and Other Tax Liabilities, Noncurrent		4,003	3,775
Asset Retirement Obligations, Noncurrent		17	14
Non-pension postretirement benefit obligations		128	134
Regulatory liabilities		146	158
Mark-to-market derivative liabilities (noncurrent liabilities)		0	0
Unamortized energy contract liabilities		599	750
Other		214	249
Total deferred credits and other liabilities		5,107	5,080
Total liabilities		12,435	13,009
Stockholders' Equity Attributable to Parent [Abstract]
Retained earnings		31	(61)
Member’s equity
Members' Capital		8,835	8,077
Total member's equity		8,866	8,016
Total equity		8,866	8,016
Total liabilities and shareholders’ equity	[8]	21,301	21,025
Pepco Holdings LLC [Member] | Variable Interest Entity, Primary Beneficiary [Member] | Successor [Member]
Assets, Current [Abstract]
Cash and cash equivalents	[3]	0	0
Restricted cash and cash equivalents	[3]	9	9
Accounts receivable, net
Customer	[3]	0	0
Other	[3]	0	0
Mark-to-market derivative assets	[3]	0	0
Inventories, net
Materials and supplies	[3]	0	0
Other	[3]	4	5
Total current assets	[3]	13	14
Property, plant and equipment, net	[3]	0	0
Deferred debits and other assets
Nuclear decommissioning trust funds	[3]	0	0
Goodwill	[3]	0	0
Mark-to-market derivative assets	[3]	0	0
Other	[3]	30	35
Total assets	[3]	43	49
Liabilities, Current [Abstract]
Long-term debt due within one year	[3]	36	40
Accounts payable	[3]	0	0
Accrued expenses	[3]	1	2
Unamortized energy contract liabilities	[3]	0	0
Mark-to-market derivative liabilities (current liabilities)	[3]	0	0
Other	[3]	0	0
Total current liabilities	[3]	37	42
Long-term debt	[3]	75	101
Deferred credits and other liabilities
Asset Retirement Obligations, Noncurrent	[3]	0	0
Pension obligations	[3],[5]	0	0
Unamortized energy contract liabilities	[3]	0	0
Other	[3]	0	0
Total liabilities	[3]	112	143
Pepco Holdings LLC [Member] | Variable Interest Entity, Primary Beneficiary, Aggregated Disclosure [Member] | Successor [Member]
Deferred debits and other assets
Total assets		43	49
Deferred credits and other liabilities
Total liabilities		112	143
Potomac Electric Power Company [Member]
Assets, Current [Abstract]
Cash and cash equivalents		117	9
Restricted cash and cash equivalents		34	33
Accounts receivable, net
Customer		265	235
Other		92	150
Inventories, net
Materials and supplies		78	63
Regulatory assets		181	162
Other		10	32
Total current assets		777	684
Property, plant and equipment, net		5,866	5,571
Deferred debits and other assets
Regulatory assets		699	690
Investments		102	102
Prepaid pension asset		327	282
Other		4	6
Total deferred debits and other assets		1,132	1,080
Total assets		7,775	7,335
Liabilities, Current [Abstract]
Short-term borrowings		0	23
Long-term debt due within one year		19	16
Accounts payable		168	209
Accrued expenses		153	113
Payables to affiliates		64	74
Customer deposits		53	53
Regulatory liabilities		5	11
Payables to Customers		42	68
Other		20	29
Total current liabilities		524	596
Long-term debt		2,527	2,333
Deferred credits and other liabilities
Deferred Income Taxes and Other Tax Liabilities, Noncurrent		2,024	1,910
Non-pension postretirement benefit obligations		37	43
Regulatory liabilities		21	20
Other		126	133
Total deferred credits and other liabilities		2,208	2,106
Total liabilities		5,259	5,035
Stockholders' Equity Attributable to Parent [Abstract]
Common stock		1,470	1,309
Retained earnings		1,046	991
Total shareholders’ equity		2,516	2,300
Member’s equity
Total liabilities and shareholders’ equity		7,775	7,335
Delmarva Power and Light Company [Member]
Assets, Current [Abstract]
Cash and cash equivalents		3	46
Accounts receivable, net
Customer		118	136
Other		36	63
Receivables from affiliates		0	3
Inventories, net
Energy Related Inventory, Natural Gas in Storage		9	7
Materials and supplies		35	32
Regulatory assets		69	59
Other		16	24
Total current assets		286	370
Property, plant and equipment, net		3,480	3,273
Deferred debits and other assets
Regulatory assets		300	289
Goodwill		8	8
Prepaid pension asset		197	206
Other		5	7
Total deferred debits and other assets		510	510
Total assets		4,276	4,153
Liabilities, Current [Abstract]
Short-term borrowings		54	0
Long-term debt due within one year		109	119
Accounts payable		95	88
Accrued expenses		52	36
Payables to affiliates		35	38
Customer deposits		35	36
Regulatory liabilities		42	43
Payables to Customers		3	13
Other		7	8
Total current liabilities		432	381
Long-term debt		1,217	1,221
Deferred credits and other liabilities
Deferred Income Taxes and Other Tax Liabilities, Noncurrent		1,125	1,056
Non-pension postretirement benefit obligations		17	19
Regulatory liabilities		86	97
Other		48	53
Total deferred credits and other liabilities		1,276	1,225
Total liabilities		2,925	2,827
Stockholders' Equity Attributable to Parent [Abstract]
Common stock		764	764
Retained earnings		587	562
Total shareholders’ equity		1,351	1,326
Member’s equity
Total liabilities and shareholders’ equity		4,276	4,153
Atlantic City Electric Company [Member]
Assets, Current [Abstract]
Cash and cash equivalents		5	101
Restricted cash and cash equivalents		9	9
Accounts receivable, net
Customer		107	125
Other		54	44
Inventories, net
Materials and supplies		29	22
Prepaid Taxes		15	0
Regulatory assets		87	96
Other		3	2
Total current assets		309	399
Property, plant and equipment, net		2,662	2,521
Deferred debits and other assets
Regulatory assets		417	405
Notes, Loans and Financing Receivable, Gross, Noncurrent		4	4
Prepaid pension asset		76	84
Other		42	44
Total deferred debits and other assets		539	537
Total assets	[9]	3,510	3,457
Liabilities, Current [Abstract]
Short-term borrowings		65	0
Long-term debt due within one year		32	35
Accounts payable		122	132
Accrued expenses		39	38
Payables to affiliates		24	29
Customer deposits		31	33
Regulatory liabilities		18	25
Payables to Customers		8	20
Other		6	8
Total current liabilities		345	320
Long-term debt		1,098	1,120
Deferred credits and other liabilities
Deferred Income Taxes and Other Tax Liabilities, Noncurrent		951	917
Non-pension postretirement benefit obligations		33	34
Regulatory liabilities		0	0
Other		25	32
Total deferred credits and other liabilities		1,009	983
Total liabilities		2,452	2,423
Stockholders' Equity Attributable to Parent [Abstract]
Common stock		912	912
Retained earnings		146	122
Total shareholders’ equity		1,058	1,034
Member’s equity
Total liabilities and shareholders’ equity	[9]	3,510	3,457
Atlantic City Electric Company [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Assets, Current [Abstract]
Cash and cash equivalents		0	0
Restricted cash and cash equivalents		9	9
Accounts receivable, net
Customer		0	0
Other		0	0
Mark-to-market derivative assets		0	0
Inventories, net
Materials and supplies		0	0
Other		0	0
Total current assets		9	9
Property, plant and equipment, net		0	0
Deferred debits and other assets
Nuclear decommissioning trust funds		0	0
Goodwill		0	0
Mark-to-market derivative assets		0	0
Other		22	23
Total assets		31	32
Liabilities, Current [Abstract]
Long-term debt due within one year		32	35
Accounts payable		0	0
Accrued expenses		1	2
Unamortized energy contract liabilities		0	0
Mark-to-market derivative liabilities (current liabilities)		0	0
Other		0	0
Total current liabilities		33	37
Long-term debt		67	89
Deferred credits and other liabilities
Asset Retirement Obligations, Noncurrent		0	0
Pension obligations	[5]	0	0
Unamortized energy contract liabilities		0	0
Other		0	0
Total liabilities		100	126
Atlantic City Electric Company [Member] | Variable Interest Entity, Primary Beneficiary, Aggregated Disclosure [Member]
Member’s equity
Noncontrolling Interest in Variable Interest Entity		31	32
Variable Interest Entity, Nonconsolidated, Carrying Amount, Liabilities		$ 100	$ 126

[1] Exelon’s consolidated assets include $9,520 million and $8,893 million at September 30, 2017 and December 31, 2016, respectively, of certain VIEs that can only be used to settle the liabilities of the VIE. Exelon’s consolidated liabilities include $3,688 million and $3,356 million at September 30, 2017 and December 31, 2016, respectively, of certain VIEs for which the VIE creditors do not have recourse to Exelon. See Note 3 - Variable Interest Entities.

[2] These items represent amounts on the unconsolidated VIE balance sheets, not on Exelon’s or Generation’s Consolidated Balance Sheets. These items are included to provide information regarding the relative size of the unconsolidated VIEs.

[3] Includes certain purchase accounting adjustments not pushed down to the ACE standalone entity.

[4] Includes certain purchase accounting adjustments not pushed down to the BGE standalone entity.

[5] Includes the retail gas pension obligation, which is presented as a net asset balance within the Prepaid pension asset line item on Generation’s Consolidated Balance Sheets. See Note 14 - Retirement Benefits for additional details.

[6] Generation’s consolidated assets include $9,477 million and $8,817 million at September 30, 2017 and December 31, 2016, respectively, of certain VIEs that can only be used to settle the liabilities of the VIE. Generation’s consolidated liabilities include $3,576 million and $3,170 million at September 30, 2017 and December 31, 2016, respectively, of certain VIEs for which the VIE creditors do not have recourse to Generation. See Note 3 - Variable Interest Entities.

[7] BGE’s consolidated assets include $26 million at December 31, 2016 of BGE’s consolidated VIE that can only be used to settle the liabilities of the VIE. BGE’s consolidated liabilities include $42 million at December 31, 2016 of BGE’s consolidated VIE for which the VIE creditors do not have recourse to BGE. BGE no longer has interests in any VIEs as of September 30, 2017. See Note 3 - Variable Interest Entities.

[8] PHI’s consolidated total assets include $43 million and $49 million at September 30, 2017 and December 31, 2016, respectively, of PHI's consolidated VIE that can only be used to settle the liabilities of the VIE. PHI’s consolidated total liabilities include $112 million and $143 million at September 30, 2017 and December 31, 2016, respectively, of PHI's consolidated VIE for which the VIE creditors do not have recourse to PHI. See Note 3 - Variable Interest Entities.

[9] ACE’s consolidated total assets include $31 million and $32 million at September 30, 2017 and December 31, 2016, respectively, of ACE's consolidated VIE that can only be used to settle the liabilities of the VIE. ACE’s consolidated total liabilities include $100 million and $126 million at September 30, 2017 and December 31, 2016, respectively, of ACE's consolidated VIE for which the VIE creditors do not have recourse to ACE. See Note 3 - Variable Interest Entities.