Statements of Changes in Shareholder's Equity - 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, 2020			$ 4,197	$ 2,318	$ 1,879
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 1,829	$ 1,706	408		408
Common stock dividends	(1,499)	(1,499)	(292)		(292)
Contributions from parent			257	257
Ending Balance at Dec. 31, 2021			4,570	2,575	1,995
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,171	2,170	380		380
Common stock dividends	(1,336)	(1,336)	(300)		(300)
Contributions from parent			286	286
Ending Balance at Dec. 31, 2022	24,744		4,936	2,861	2,075
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,328	2,328	485		485
Common stock dividends	(1,435)	$ (1,435)	(316)		(316)
Contributions from parent			385	385
Ending Balance at Dec. 31, 2023	$ 25,755		$ 5,490	$ 3,246	$ 2,244