Statements of Changes in Shareholders Equity (Unaudited) - BGE - USD ($) $ in Millions	Total	Retained Earnings	Baltimore Gas and Electric Company	Baltimore Gas and Electric Company Common Stock	Baltimore Gas and Electric Company Retained Earnings
Beginning Balance at Dec. 31, 2021			$ 4,570	$ 2,575	$ 1,995
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 598	$ 597	198		198
Common stock dividends	(332)	(332)	(76)		(76)
Ending Balance at Mar. 31, 2022			4,692	2,575	2,117
Beginning Balance at Dec. 31, 2021			4,570	2,575	1,995
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,739		267
Ending Balance at Sep. 30, 2022			4,798	2,761	2,037
Beginning Balance at Mar. 31, 2022			4,692	2,575	2,117
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	465	465	37		37
Common stock dividends	(332)	(332)	(75)		(75)
Contributions from parent			186	186
Ending Balance at Jun. 30, 2022			4,840	2,761	2,079
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	676	676	33		33
Common stock dividends	(335)	(335)	(75)		(75)
Ending Balance at Sep. 30, 2022			4,798	2,761	2,037
Beginning Balance at Dec. 31, 2022	24,744		4,936	2,861	2,075
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	669	669	200		200
Common stock dividends	(359)	(359)	(80)		(80)
Contributions from parent			237	237
Ending Balance at Mar. 31, 2023			5,293	3,098	2,195
Beginning Balance at Dec. 31, 2022	24,744		4,936	2,861	2,075
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,711		286
Ending Balance at Sep. 30, 2023	25,470		5,222	3,098	2,124
Beginning Balance at Mar. 31, 2023			5,293	3,098	2,195
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	343	343	42		42
Common stock dividends	(359)	(359)	(79)		(79)
Ending Balance at Jun. 30, 2023			5,256	3,098	2,158
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	700	700	45		45
Common stock dividends	(358)	$ (358)	(79)		(79)
Ending Balance at Sep. 30, 2023	$ 25,470		$ 5,222	$ 3,098	$ 2,124