Balance Sheets (Unaudited) - DPL - USD ($) shares in Millions, $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Current assets
Cash and cash equivalents	$ 300	$ 407
Restricted cash and cash equivalents	435	566
Accounts receivable
Customer accounts receivable	2,575	2,544
Customer allowance for credit losses	(341)	(327)
Customer accounts receivable, net	2,234	2,217
Other accounts receivable	1,168	1,426
Other allowance for credit losses	(88)	(82)
Other accounts receivable, net	1,080	1,344
Inventories, net
Fossil fuel	105	208
Materials and supplies	657	547
Regulatory assets	2,307	1,641
Other	401	406
Total current assets	7,519	7,336
Property, plant and equipment, net	72,458	69,076
Deferred debits and other assets
Regulatory assets	8,128	8,037
Goodwill	6,630	6,630
Receivable related to Regulatory Agreement Units	2,923	2,897
Investments	246	232
Other	1,355	1,141
Total deferred debits and other assets	19,282	18,937
Total assets	99,259	95,349
Current liabilities
Short-term borrowings	1,720	2,586
Long-term debt due within one year	1,654	1,802
Accrued expenses	1,315	1,226
Regulatory liabilities	437	437
Mark-to-market derivative liabilities	44	8
Unamortized energy contract liabilities	8	10
Other	933	1,155
Total current liabilities	8,800	10,611
Long-term debt	39,431	35,272
Long-term debt to financing trusts	390	390
Deferred credits and other liabilities
Deferred income taxes and unamortized investment tax credits	11,792	11,250
Regulatory liabilities	9,236	9,112
Asset retirement obligations	269	269
Pension obligations	1,085	1,109
Non-pension postretirement benefit obligations	515	507
Mark-to-market derivative liabilities	113	83
Unamortized energy contract liabilities	29	35
Other	2,129	1,967
Total deferred credits and other liabilities	25,168	24,332
Total liabilities	73,789	70,605
Commitments and contingencies
Common stock (in dollars)	$ 0	$ 0
Common stock, shares authorized (in shares)	2,000	2,000
Common stock, shares outstanding (in shares)	995	994
Shareholders’ equity
Common stock	$ 20,956	$ 20,908
Treasury stock, common (in shares)	2	2
Treasury stock, at cost	$ (123)	$ (123)
Accumulated other comprehensive loss, net	(596)	(638)
Retained earnings	5,233	4,597
Total shareholders’ equity	25,470	24,744
Members' Equity [Abstract]
Total liabilities and shareholders’ equity	99,259	95,349
Related Party
Current liabilities
Accounts payable	5	5
Long-term debt to financing trusts	390	390
Nonrelated Party
Current liabilities
Accounts payable	2,684	3,382
Delmarva Power and Light Company
Current assets
Cash and cash equivalents	5	31
Restricted cash and cash equivalents	1	121
Accounts receivable
Customer accounts receivable	179	204
Customer allowance for credit losses	(23)	(21)
Customer accounts receivable, net	156	183
Other accounts receivable	59	52
Other allowance for credit losses	(9)	(7)
Other accounts receivable, net	50	45
Inventories, net
Fossil fuel	9	18
Materials and supplies	65	58
Prepaid utility taxes	30	23
Regulatory assets	55	80
Other	9	14
Total current assets	390	573
Property, plant and equipment, net	5,079	4,820
Deferred debits and other assets
Regulatory assets	210	202
Prepaid pension asset	140	153
Total deferred debits and other assets	401	409
Total assets	5,870	5,802
Current liabilities
Short-term borrowings	0	115
Long-term debt due within one year	584	584
Accrued expenses	63	41
Customer deposits	31	29
Regulatory liabilities	55	44
Total current liabilities	940	1,143
Long-term debt	1,476	1,354
Deferred credits and other liabilities
Deferred income taxes and unamortized investment tax credits	896	869
Regulatory liabilities	368	380
Asset retirement obligations	12	13
Non-pension postretirement benefit obligations	9	9
Other	89	84
Total deferred credits and other liabilities	1,374	1,355
Total liabilities	3,790	3,852
Commitments and contingencies
Shareholders’ equity
Common stock	1,455	1,356
Retained earnings	625	594
Total shareholders’ equity	2,080	1,950
Members' Equity [Abstract]
Total liabilities and shareholders’ equity	5,870	5,802
Delmarva Power and Light Company | Related Party
Accounts receivable
Receivables from affiliates	0	0
Receivable from Exelon/PHI intercompany money pool	10	0
Current liabilities
Accounts payable	25	22
Delmarva Power and Light Company | Nonrelated Party
Deferred debits and other assets
Other	51	54
Current liabilities
Accounts payable	161	172
Other	$ 21	$ 136