Balance Sheets (Unaudited) - BGE - 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
Baltimore Gas and Electric Company
Current assets
Cash and cash equivalents	15	43
Restricted cash and cash equivalents	1	24
Accounts receivable
Customer accounts receivable	438	617
Customer allowance for credit losses	(52)	(54)
Customer accounts receivable, net	386	563
Other accounts receivable	110	132
Other allowance for credit losses	(9)	(10)
Other accounts receivable, net	101	122
Inventories, net
Fossil fuel	41	91
Materials and supplies	70	65
Prepaid utility taxes	1	52
Regulatory assets	227	177
Other	19	13
Total current assets	861	1,150
Property, plant and equipment, net	11,893	11,338
Deferred debits and other assets
Regulatory assets	591	527
Investments	9	7
Prepaid pension asset	259	291
Total deferred debits and other assets	895	862
Total assets	13,649	13,350
Current liabilities
Short-term borrowings	59	408
Long-term debt due within one year	0	300
Accrued expenses	224	159
Customer deposits	111	105
Regulatory liabilities	36	47
Total current liabilities	861	1,575
Long-term debt	4,601	3,907
Deferred credits and other liabilities
Deferred income taxes and unamortized investment tax credits	1,905	1,832
Regulatory liabilities	787	816
Asset retirement obligations	32	30
Non-pension postretirement benefit obligations	160	166
Other	81	88
Total deferred credits and other liabilities	2,965	2,932
Total liabilities	8,427	8,414
Commitments and contingencies
Shareholders’ equity
Common stock	3,098	2,861
Retained earnings	2,124	2,075
Total shareholders’ equity	5,222	4,936
Members' Equity [Abstract]
Total liabilities and shareholders’ equity	13,649	13,350
Baltimore Gas and Electric Company | Related Party
Accounts receivable
Receivables from affiliates	0	0
Current liabilities
Accounts payable	33	39
Baltimore Gas and Electric Company | Nonrelated Party
Deferred debits and other assets
Other	36	37
Current liabilities
Accounts payable	364	462
Other	$ 34	$ 55