Consolidated Balance Sheets - USD ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019
Current assets
Cash and cash equivalents		$ 663	$ 587
Restricted cash and cash equivalents		438	358
Accounts receivable
Customer accounts receivable		3,597	4,835
Customer allowance for credit losses		(366)	(243)
Customer accounts receivable, net		3,231	4,592
Other accounts receivable		1,469	1,631
Other allowance for credit losses		(71)	(48)
Other accounts receivable, net		1,398	1,583
Mark-to-market derivative assets, current		644	679
Unamortized energy contract assets, current		38	47
Inventories, net
Fossil fuel and emission allowances		297	312
Materials and supplies		1,425	1,456
Regulatory assets, current		1,228	1,170
Renewable energy credits, current		633	348
Assets held for sale		958	0
Other		1,609	905
Total current assets		12,562	12,037
Property, plant and equipment, net		82,584	80,233
Accumulated depreciation and amortization		26,727	23,979
Deferred debits and other assets
Regulatory assets, noncurrent		8,759	8,335
Nuclear decommissioning trust funds		14,464	13,190
Investments		440	464
Goodwill		6,677	6,677
Mark-to-market derivative assets, noncurrent		555	508
Unamortized energy contract assets, noncurrent		294	336
Other		2,982	3,197
Total deferred debits and other assets		34,171	32,707
Total assets	[1]	129,317	124,977
Current liabilities
Short-term borrowings		2,031	1,370
Long-term debt due within one year		1,819	4,710
Accounts payable		3,562	3,560
Accrued expenses		2,078	1,981
Payables to affiliates, current		5	5
Regulatory liabilities, current		581	406
Mark-to-market derivative liabilities, current		295	247
Unamortized energy contract liabilities, current		100	132
Renewable energy credit obligation		661	443
Liabilities held for sale		375	0
Other		1,264	1,331
Total current liabilities		12,771	14,185
Long-term debt		35,093	31,329
Long-term debt to financing trusts		390	390
Deferred credits and other liabilities
Deferred income taxes and unamortized investment tax credits		13,035	12,351
Asset retirement obligations, noncurrent		12,300	10,846
Pension obligations		4,503	4,247
Non-pension postretirement benefits obligations		2,011	2,076
Spent nuclear fuel obligation		1,208	1,199
Regulatory liabilities, noncurrent		9,485	9,986
Mark-to-market derivative liabilities, noncurrent		473	393
Unamortized energy contract liabilities, noncurrent		238	338
Other		2,942	3,064
Total deferred credits and other liabilities		46,195	44,500
Total liabilities	[1]	94,449	90,404
Commitments and contingencies
Shareholders’ equity
Common stock		19,373	19,274
Treasury stock, at cost		(123)	(123)
Retained earnings/Undistributed earnings (losses)		16,735	16,267
Accumulated other comprehensive loss, net		(3,400)	(3,194)
Total shareholders’ equity		32,585	32,224
Member’s equity
Noncontrolling interests		2,283	2,349
Total equity		34,868	34,573
Total liabilities and equity		$ 129,317	$ 124,977
Common Stock, Shares Authorized		2,000,000,000	2,000,000,000
Common Stock, Shares, Outstanding		976,000,000	973,000,000
Treasury Stock, Shares		2,000,000	2,000,000
Variable Interest Entity, Primary Beneficiary [Member]
Current assets
Cash and cash equivalents		$ 98	$ 163
Restricted cash and cash equivalents		47	88
Accounts receivable
Customer accounts receivable, net		148	151
Unamortized energy contract assets, current		22	23
Inventories, net
Materials and supplies		244	227
Assets held for sale		101	0
Other		674	32
Total current assets		1,370	723
Property, plant and equipment, net		5,803	6,022
Deferred debits and other assets
Nuclear decommissioning trust funds		3,007	2,741
Unamortized energy contract assets, noncurrent		249	250
Other		52	89
Total assets		10,481	9,825
Current liabilities
Long-term debt due within one year		94	544
Accounts payable		81	106
Accrued expenses		70	70
Unamortized energy contract liabilities, current		4	8
Liabilities held for sale		16	0
Other		5	3
Total current liabilities		270	731
Long-term debt		889	527
Deferred credits and other liabilities
Asset retirement obligations, noncurrent		2,318	2,128
Unamortized energy contract liabilities, noncurrent		0	1
Other		129	89
Total liabilities		3,606	3,476
Variable Interest Entity, Primary Beneficiary [Member] | Nonrecourse [Member]
Deferred credits and other liabilities
Total liabilities		3,598	3,473
Variable Interest Entity, Primary Beneficiary [Member] | Asset Pledged as Collateral [Member]
Deferred debits and other assets
Total assets		10,200	9,532
Exelon Generation Co L L C [Member]
Current assets
Cash and cash equivalents		226	303
Restricted cash and cash equivalents		89	146
Accounts receivable
Customer accounts receivable		1,330	2,973
Customer allowance for credit losses		(32)	(80)
Customer accounts receivable, net		1,298	2,893
Other accounts receivable		352	619
Other accounts receivable, net		352	619
Mark-to-market derivative assets, current		644	675
Receivables from affiliates, current		153	190
Unamortized energy contract assets, current		38	47
Inventories, net
Fossil fuel and emission allowances		233	236
Materials and supplies		978	1,026
Renewable energy credits, current		621	336
Assets held for sale		958	0
Other		1,357	605
Total current assets		6,947	7,076
Property, plant and equipment, net		22,214	24,193
Accumulated depreciation and amortization		13,370	12,017
Deferred debits and other assets
Nuclear decommissioning trust funds		14,464	13,190
Investments		184	235
Goodwill		47	47
Mark-to-market derivative assets, noncurrent		555	508
Prepaid pension asset		1,558	1,438
Unamortized energy contract assets, noncurrent		293	336
Deferred income taxes		6	12
Other		1,826	1,960
Total deferred debits and other assets		18,933	17,726
Total assets	[2]	48,094	48,995
Current liabilities
Short-term borrowings		840	320
Long-term debt due within one year		197	2,624
Long-term debt to affiliates due within one year		0	558
Accounts payable		1,253	1,692
Accrued expenses		788	786
Payables to affiliates, current		107	117
Borrowings from Exelon/PHI intercompany money pool		285	0
Mark-to-market derivative liabilities, current		262	215
Unamortized energy contract liabilities, current		7	17
Renewable energy credit obligation		661	443
Liabilities held for sale		375	0
Other		444	517
Total current liabilities		5,219	7,289
Long-term debt		5,566	4,464
Long-term debt to affiliates		324	328
Deferred credits and other liabilities
Deferred income taxes and unamortized investment tax credits		3,656	3,752
Asset retirement obligations, noncurrent		12,054	10,603
Non-pension postretirement benefits obligations		858	878
Spent nuclear fuel obligation		1,208	1,199
Payables to affiliates, noncurrent		3,017	3,103
Mark-to-market derivative liabilities, noncurrent		205	123
Unamortized energy contract liabilities, noncurrent		3	11
Other		1,308	1,415
Total deferred credits and other liabilities		22,309	21,084
Total liabilities	[2]	33,418	33,165
Commitments and contingencies
Shareholders’ equity
Retained earnings/Undistributed earnings (losses)		2,805	3,950
Accumulated other comprehensive loss, net		(30)	(32)
Member’s equity
Membership interest		9,624	9,566
Total member’s equity		12,399	13,484
Noncontrolling interests		2,277	2,346
Total equity		14,676	15,830
Total liabilities and equity		48,094	48,995
Exelon Generation Co L L C [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Current assets
Cash and cash equivalents		98	163
Restricted cash and cash equivalents		44	85
Accounts receivable
Customer accounts receivable, net		148	151
Unamortized energy contract assets, current		22	23
Inventories, net
Materials and supplies		244	227
Assets held for sale		101	0
Other		669	31
Total current assets		1,362	719
Property, plant and equipment, net		5,803	6,022
Deferred debits and other assets
Nuclear decommissioning trust funds		3,007	2,741
Unamortized energy contract assets, noncurrent		249	250
Other		42	73
Total assets		10,463	9,805
Current liabilities
Long-term debt due within one year		68	523
Accounts payable		81	106
Accrued expenses		70	70
Unamortized energy contract liabilities, current		4	8
Liabilities held for sale		16	0
Other		5	3
Total current liabilities		244	710
Long-term debt		889	504
Deferred credits and other liabilities
Asset retirement obligations, noncurrent		2,318	2,128
Unamortized energy contract liabilities, noncurrent		0	1
Other		129	89
Total liabilities		3,580	3,432
Exelon Generation Co L L C [Member] | Variable Interest Entity, Primary Beneficiary [Member] | Nonrecourse [Member]
Deferred credits and other liabilities
Total liabilities		3,572	3,429
Exelon Generation Co L L C [Member] | Variable Interest Entity, Primary Beneficiary [Member] | Asset Pledged as Collateral [Member]
Deferred debits and other assets
Total assets		10,182	9,512
Commonwealth Edison Co [Member]
Current assets
Cash and cash equivalents		83	90
Restricted cash and cash equivalents		279	150
Accounts receivable
Customer accounts receivable		656	604
Customer allowance for credit losses		(97)	(59)
Customer accounts receivable, net		559	545
Other accounts receivable		239	306
Other allowance for credit losses		(21)	(20)
Other accounts receivable, net		218	286
Receivables from affiliates, current		22	28
Inventories, net
Inventories, net		170	159
Regulatory assets, current		279	281
Other		49	44
Total current assets		1,659	1,583
Property, plant and equipment, net		24,557	23,107
Accumulated depreciation and amortization		5,672	5,168
Deferred debits and other assets
Regulatory assets, noncurrent		1,749	1,480
Investments		6	6
Goodwill		2,625	2,625
Receivable from affiliates, noncurrent		2,541	2,622
Prepaid pension asset		1,022	995
Other		307	347
Total deferred debits and other assets		8,250	8,075
Total assets		34,466	32,765
Current liabilities
Short-term borrowings		323	130
Long-term debt due within one year		350	500
Accounts payable		683	527
Accrued expenses		390	385
Payables to affiliates, current		96	103
Customer deposits		86	118
Regulatory liabilities, current		289	200
Mark-to-market derivative liabilities, current		33	32
Other		143	122
Total current liabilities		2,393	2,117
Long-term debt		8,633	7,991
Long-term debt to financing trusts		205	205
Deferred credits and other liabilities
Deferred income taxes and unamortized investment tax credits		4,341	4,021
Asset retirement obligations, noncurrent		126	128
Non-pension postretirement benefits obligations		173	180
Regulatory liabilities, noncurrent		6,403	6,542
Mark-to-market derivative liabilities, noncurrent		268	269
Other		595	635
Total deferred credits and other liabilities		11,906	11,775
Total liabilities		23,137	22,088
Commitments and contingencies
Shareholders’ equity
Common stock		1,588	1,588
Other paid-in capital		8,285	7,572
Retained deficit unappropriated		(1,639)	(1,639)
Retained earnings appropriated		3,095	3,156
Total shareholders’ equity		11,329	10,677
Member’s equity
Total liabilities and equity		$ 34,466	$ 32,765
Commonwealth Edison Co [Member] | Common Stock [Member]
Shareholders’ equity
Common Stock, Par or Stated Value Per Share		$ 12.50	$ 12.50
Member’s equity
Common Stock, Shares Authorized		250,000,000	250,000,000
Common Stock, Shares, Outstanding		127,000,000	127,000,000
PECO Energy Co [Member]
Current assets
Cash and cash equivalents		$ 19	$ 21
Restricted cash and cash equivalents		7	6
Accounts receivable
Customer accounts receivable		511	412
Customer allowance for credit losses		(116)	(55)
Customer accounts receivable, net		395	357
Other accounts receivable		130	145
Other allowance for credit losses		(8)	(7)
Other accounts receivable, net		122	138
Receivables from affiliates, current		2	1
Receivable from Exelon/PHI intercompany money pool		0	68
Inventories, net
Fossil fuel and emission allowances		33	36
Materials and supplies		38	35
Regulatory assets, current		25	41
Other		21	19
Total current assets		662	722
Property, plant and equipment, net		10,181	9,292
Accumulated depreciation and amortization		3,843	3,718
Deferred debits and other assets
Regulatory assets, noncurrent		776	554
Investments		30	27
Receivable from affiliates, noncurrent		475	480
Prepaid pension asset		375	365
Other		32	29
Total deferred debits and other assets		1,688	1,455
Total assets		12,531	11,469
Current liabilities
Long-term debt due within one year		300	0
Accounts payable		479	387
Accrued expenses		129	101
Payables to affiliates, current		50	55
Borrowings from Exelon/PHI intercompany money pool		40	0
Customer deposits		59	69
Regulatory liabilities, current		121	91
Other		30	19
Total current liabilities		1,208	722
Long-term debt		3,453	3,405
Long-term debt to financing trusts		184	184
Deferred credits and other liabilities
Deferred income taxes and unamortized investment tax credits		2,242	2,080
Asset retirement obligations, noncurrent		29	28
Non-pension postretirement benefits obligations		286	288
Regulatory liabilities, noncurrent		503	510
Other		93	74
Total deferred credits and other liabilities		3,153	2,980
Total liabilities		7,998	7,291
Commitments and contingencies
Shareholders’ equity
Common stock		3,014	2,766
Retained earnings/Undistributed earnings (losses)		1,519	1,412
Total shareholders’ equity		4,533	4,178
Member’s equity
Total liabilities and equity		$ 12,531	$ 11,469
PECO Energy Co [Member] | Common Stock [Member]
Member’s equity
Common Stock, Shares Authorized		500,000,000	500,000,000
Common Stock, Shares, Outstanding		170,000,000	170,000,000
Common Stock, No Par Value		$ 0	$ 0
Baltimore Gas and Electric Company [Member]
Current assets
Cash and cash equivalents		$ 144	$ 24
Restricted cash and cash equivalents		1	1
Accounts receivable
Customer accounts receivable		487	329
Customer allowance for credit losses		(35)	(12)
Customer accounts receivable, net		452	317
Other accounts receivable		117	152
Other allowance for credit losses		(9)	(5)
Other accounts receivable, net		108	147
Receivables from affiliates, current		3	1
Inventories, net
Fossil fuel and emission allowances		41	46
Materials and supplies		25	30
Prepaid utility taxes		0	78
Regulatory assets, current		168	183
Other		6	6
Total current assets		948	833
Property, plant and equipment, net		9,872	8,990
Accumulated depreciation and amortization		4,034	3,834
Deferred debits and other assets
Regulatory assets, noncurrent		481	454
Investments		10	7
Prepaid pension asset		270	264
Other		69	86
Total deferred debits and other assets		830	811
Total assets		11,650	10,634
Current liabilities
Short-term borrowings		0	76
Long-term debt due within one year		300	0
Accounts payable		346	243
Accrued expenses		205	152
Payables to affiliates, current		61	66
Customer deposits		110	120
Regulatory liabilities, current		30	33
Other		91	63
Total current liabilities		1,143	753
Long-term debt		3,364	3,270
Deferred credits and other liabilities
Deferred income taxes and unamortized investment tax credits		1,521	1,396
Asset retirement obligations, noncurrent		23	22
Non-pension postretirement benefits obligations		189	199
Regulatory liabilities, noncurrent		1,109	1,195
Other		104	116
Total deferred credits and other liabilities		2,946	2,928
Total liabilities		7,453	6,951
Commitments and contingencies
Shareholders’ equity
Common stock	[3]	2,318	1,907
Retained earnings/Undistributed earnings (losses)		1,879	1,776
Total shareholders’ equity		4,197	3,683
Member’s equity
Total liabilities and equity		$ 11,650	$ 10,634
Baltimore Gas and Electric Company [Member] | Common Stock [Member]
Member’s equity
Common Stock, Shares Authorized		1,500	1,500
Common Stock, Shares, Outstanding		1,000	1,000
Common Stock, No Par Value		$ 0	$ 0
Pepco Holdings LLC [Member]
Current assets
Cash and cash equivalents		$ 111	$ 131
Restricted cash and cash equivalents		39	36
Accounts receivable
Customer accounts receivable		611	516
Customer allowance for credit losses		(86)	(37)
Customer accounts receivable, net		525	479
Other accounts receivable		260	190
Other allowance for credit losses		(33)	(16)
Other accounts receivable, net		227	174
Receivables from affiliates, current		8	1
Inventories, net
Fossil fuel and emission allowances		6	8
Materials and supplies		198	190
Regulatory assets, current		440	412
Other		45	49
Total current assets		1,599	1,480
Property, plant and equipment, net		15,377	14,296
Accumulated depreciation and amortization		1,811	1,213
Deferred debits and other assets
Regulatory assets, noncurrent		1,933	2,061
Investments		140	135
Goodwill		4,005	4,005
Prepaid pension asset		365	406
Deferred income taxes		10	13
Other		307	323
Total deferred debits and other assets		6,760	6,943
Total assets		23,736	22,719
Current liabilities
Short-term borrowings		368	208
Long-term debt due within one year		347	103
Accounts payable		539	462
Accrued expenses		299	296
Payables to affiliates, current		104	98
Borrowings from Exelon/PHI intercompany money pool		21	12
Customer deposits		106	117
Regulatory liabilities, current		137	70
Unamortized energy contract liabilities, current		92	115
Other		141	131
Total current liabilities		2,154	1,612
Long-term debt		6,659	6,460
Deferred credits and other liabilities
Deferred income taxes and unamortized investment tax credits		2,439	2,278
Asset retirement obligations, noncurrent		59	57
Non-pension postretirement benefits obligations		86	93
Regulatory liabilities, noncurrent		1,438	1,707
Unamortized energy contract liabilities, noncurrent		235	327
Other		622	577
Total deferred credits and other liabilities		4,879	5,039
Total liabilities	[4]	13,692	13,111
Commitments and contingencies
Shareholders’ equity
Retained earnings/Undistributed earnings (losses)		(68)	(10)
Member’s equity
Membership interest		10,112	9,618
Total member’s equity		10,044	9,608
Total equity		10,044	9,608
Total liabilities and equity		23,736	22,719
Pepco Holdings LLC [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Current assets
Cash and cash equivalents		0	0
Restricted cash and cash equivalents		3	3
Accounts receivable
Customer accounts receivable, net		0	0
Unamortized energy contract assets, current		0	0
Inventories, net
Materials and supplies		0	0
Assets held for sale		0	0
Other		5	1
Total current assets		8	4
Property, plant and equipment, net		0	0
Deferred debits and other assets
Nuclear decommissioning trust funds		0	0
Unamortized energy contract assets, noncurrent		0	0
Other		10	16
Total assets		18	20
Current liabilities
Long-term debt due within one year		26	21
Accounts payable		0	0
Accrued expenses		0	0
Unamortized energy contract liabilities, current		0	0
Liabilities held for sale		0	0
Other		0	0
Total current liabilities		26	21
Long-term debt		0	23
Deferred credits and other liabilities
Asset retirement obligations, noncurrent		0	0
Unamortized energy contract liabilities, noncurrent		0	0
Other		0	0
Total liabilities		26	44
Pepco Holdings LLC [Member] | Variable Interest Entity, Primary Beneficiary [Member] | Nonrecourse [Member]
Deferred credits and other liabilities
Total liabilities		26	44
Pepco Holdings LLC [Member] | Variable Interest Entity, Primary Beneficiary [Member] | Asset Pledged as Collateral [Member]
Deferred debits and other assets
Total assets		18	20
Potomac Electric Power Company [Member]
Current assets
Cash and cash equivalents		30	30
Restricted cash and cash equivalents		35	33
Accounts receivable
Customer accounts receivable		279	244
Customer allowance for credit losses		(32)	(13)
Customer accounts receivable, net		247	231
Other accounts receivable		131	98
Other allowance for credit losses		(13)	(7)
Other accounts receivable, net		118	91
Receivables from affiliates, current		2	0
Inventories, net
Inventories, net		111	112
Regulatory assets, current		214	188
Other		13	11
Total current assets		770	696
Property, plant and equipment, net		7,456	6,909
Accumulated depreciation and amortization		3,697	3,517
Deferred debits and other assets
Regulatory assets, noncurrent		570	584
Investments		115	110
Prepaid pension asset		284	296
Other		69	66
Total deferred debits and other assets		1,038	1,056
Total assets		9,264	8,661
Current liabilities
Short-term borrowings		35	82
Long-term debt due within one year		3	2
Accounts payable		226	195
Accrued expenses		164	156
Payables to affiliates, current		55	66
Customer deposits		51	57
Regulatory liabilities, current		46	8
Merger related obligation		33	39
Current portion of DC PLUG obligation		30	30
Other		31	22
Total current liabilities		674	657
Long-term debt		3,162	2,862
Deferred credits and other liabilities
Deferred income taxes and unamortized investment tax credits		1,189	1,131
Asset retirement obligations, noncurrent		39	41
Non-pension postretirement benefits obligations		13	20
Regulatory liabilities, noncurrent		644	746
Other		340	297
Total deferred credits and other liabilities		2,225	2,235
Total liabilities		6,061	5,754
Commitments and contingencies
Shareholders’ equity
Common stock	[5]	2,058	1,796
Retained earnings/Undistributed earnings (losses)		1,145	1,111
Total shareholders’ equity		3,203	2,907
Member’s equity
Total liabilities and equity		$ 9,264	$ 8,661
Potomac Electric Power Company [Member] | Common Stock [Member]
Shareholders’ equity
Common Stock, Par or Stated Value Per Share		$ 0.01	$ 0.01
Member’s equity
Common Stock, Shares Authorized		200,000,000	200,000,000
Common Stock, Shares, Outstanding		100	100
Delmarva Power & Light Company [Member]
Current assets
Cash and cash equivalents		$ 15	$ 13
Restricted cash and cash equivalents		0	0
Accounts receivable
Customer accounts receivable		176	152
Customer allowance for credit losses		(22)	(11)
Customer accounts receivable, net		154	141
Other accounts receivable		68	42
Other allowance for credit losses		(9)	(4)
Other accounts receivable, net		59	38
Receivables from affiliates, current		1	0
Inventories, net
Fossil fuel and emission allowances		6	8
Materials and supplies		51	44
Prepaid utility taxes		11	18
Regulatory assets, current		58	52
Renewable energy credits, current		10	9
Other		3	2
Total current assets		368	325
Property, plant and equipment, net		4,314	4,035
Accumulated depreciation and amortization		1,533	1,425
Deferred debits and other assets
Regulatory assets, noncurrent		222	222
Investments		0	0
Goodwill		8	8
Prepaid pension asset		162	171
Other		66	69
Total deferred debits and other assets		458	470
Total assets		5,140	4,830
Current liabilities
Short-term borrowings		146	56
Long-term debt due within one year		82	80
Accounts payable		126	112
Accrued expenses		46	46
Payables to affiliates, current		36	32
Customer deposits		32	36
Regulatory liabilities, current		47	37
Other		20	15
Total current liabilities		535	414
Long-term debt		1,595	1,487
Deferred credits and other liabilities
Deferred income taxes and unamortized investment tax credits		715	655
Asset retirement obligations, noncurrent		14	12
Non-pension postretirement benefits obligations		15	16
Regulatory liabilities, noncurrent		493	574
Other		97	92
Total deferred credits and other liabilities		1,334	1,349
Total liabilities		3,464	3,250
Commitments and contingencies
Shareholders’ equity
Common stock	[6]	1,089	977
Retained earnings/Undistributed earnings (losses)		587	603
Total shareholders’ equity		1,676	1,580
Member’s equity
Total liabilities and equity		$ 5,140	$ 4,830
Delmarva Power & Light Company [Member] | Common Stock [Member]
Shareholders’ equity
Common Stock, Par or Stated Value Per Share		$ 2.25	$ 2.25
Member’s equity
Common Stock, Shares Authorized		1,000	1,000
Common Stock, Shares, Outstanding		1,000	1,000
Atlantic City Electric Company [Member]
Current assets
Cash and cash equivalents		$ 17	$ 12
Restricted cash and cash equivalents		3	2
Accounts receivable
Customer accounts receivable		156	121
Customer allowance for credit losses		(32)	(13)
Customer accounts receivable, net		124	108
Other accounts receivable		72	53
Other allowance for credit losses		(11)	(5)
Other accounts receivable, net		61	48
Receivables from affiliates, current		6	4
Inventories, net
Inventories, net		37	34
Regulatory assets, current		75	57
Other		3	5
Total current assets		326	270
Property, plant and equipment, net		3,475	3,190
Accumulated depreciation and amortization		1,303	1,210
Deferred debits and other assets
Regulatory assets, noncurrent		395	368
Investments		0	0
Prepaid pension asset		40	52
Other		50	53
Total deferred debits and other assets		485	473
Total assets	[7]	4,286	3,933
Current liabilities
Short-term borrowings		187	70
Long-term debt due within one year		261	20
Accounts payable		177	144
Accrued expenses		46	42
Payables to affiliates, current		31	25
Customer deposits		23	25
Regulatory liabilities, current		44	25
Other		11	9
Total current liabilities		780	360
Long-term debt		1,152	1,307
Deferred credits and other liabilities
Deferred income taxes and unamortized investment tax credits		624	577
Non-pension postretirement benefits obligations		17	17
Regulatory liabilities, noncurrent		274	357
Other		48	39
Total deferred credits and other liabilities		963	990
Total liabilities	[7]	2,895	2,657
Commitments and contingencies
Shareholders’ equity
Common stock		1,271	1,154
Retained earnings/Undistributed earnings (losses)		120	122
Total shareholders’ equity		1,391	1,276
Member’s equity
Total liabilities and equity		$ 4,286	$ 3,933
Atlantic City Electric Company [Member] | Common Stock [Member]
Shareholders’ equity
Common Stock, Par or Stated Value Per Share		$ 3	$ 3
Member’s equity
Common Stock, Shares Authorized		25,000,000	25,000,000
Common Stock, Shares, Outstanding		9,000,000	9,000,000
Atlantic City Electric Company [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Current assets
Cash and cash equivalents		$ 0	$ 0
Restricted cash and cash equivalents		3	3
Accounts receivable
Customer accounts receivable, net		0	0
Unamortized energy contract assets, current		0	0
Inventories, net
Materials and supplies		0	0
Assets held for sale		0	0
Other		0	0
Total current assets		3	3
Property, plant and equipment, net		0	0
Deferred debits and other assets
Nuclear decommissioning trust funds		0	0
Unamortized energy contract assets, noncurrent		0	0
Other		10	14
Total assets		13	17
Current liabilities
Long-term debt due within one year		21	20
Accounts payable		0	0
Accrued expenses		0	0
Unamortized energy contract liabilities, current		0	0
Liabilities held for sale		0	0
Other		0	0
Total current liabilities		21	20
Long-term debt		0	21
Deferred credits and other liabilities
Asset retirement obligations, noncurrent		0	0
Unamortized energy contract liabilities, noncurrent		0	0
Other		0	0
Total liabilities		21	41
Atlantic City Electric Company [Member] | Variable Interest Entity, Primary Beneficiary [Member] | Nonrecourse [Member]
Deferred credits and other liabilities
Total liabilities		21	41
Atlantic City Electric Company [Member] | Variable Interest Entity, Primary Beneficiary [Member] | Asset Pledged as Collateral [Member]
Deferred debits and other assets
Total assets		$ 13	$ 17

[1] Exelon’s consolidated assets include $10,200 million and $9,532 million at December 31, 2020 and 2019, respectively, of certain VIEs that can only be used to settle the liabilities of the VIE. Exelon’s consolidated liabilities include $3,598 million and $3,473 million at December 31, 2020 and 2019, respectively, of certain VIEs for which the VIE creditors do not have recourse to Exelon. See Note 23–Variable Interest Entities for additional information.

[2] Generation’s consolidated assets include $10,182 million and $9,512 million at December 31, 2020 and 2019, respectively, of certain VIEs that can only be used to settle the liabilities of the VIE. Generation’s consolidated liabilities include $3,572 million and $3,429 million at December 31, 2020 and 2019, respectively, of certain VIEs for which the VIE creditors do not have recourse to Generation. See Note 23–Variable Interest Entities for additional information.

[3] In millions, shares round to zero. Number of shares is 1,500 authorized and 1,000 outstanding at December 31, 2020 and 2019.

[4] PHI’s consolidated total assets include $18 million and $20 million at December 31, 2020 and 2019, respectively, of PHI's consolidated VIE that can only be used to settle the liabilities of the VIE. PHI’s consolidated total liabilities include $26 million and $44 million at December 31, 2020 and 2019, respectively, of PHI's consolidated VIE for which the VIE creditors do not have recourse to PHI. See Note 23 - Variable Interest Entities for additional information.

[5] In millions, shares round to zero. Number of shares is 100 outstanding at December 31, 2020 and 2019.

[6] In millions, shares round to zero. Number of shares is 1,000 authorized and 1,000 outstanding at December 31, 2020 and 2019.

[7] ACE’s consolidated assets include $13 million and $17 million at December 31, 2020 and 2019, respectively, of ACE’s consolidated VIE that can only be used to settle the liabilities of the VIE. ACE’s consolidated liabilities include $21 million and $41 million at December 31, 2020 and 2019, respectively, of ACE’s consolidated VIE for which the VIE creditors do not have recourse to ACE. See Note 23 - Variable Interest Entities for additional information.