Statements of Cash Flows - BGE - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash flows from operating activities
Net income	$ 2,328	$ 2,171	$ 1,829
Adjustments to reconcile net income to net cash flows used in operating activities:
Depreciation and amortization	3,506	3,533	7,573
Asset impairments	0	48	552
Deferred income taxes and amortization of investment tax credits	319	255	18
Other non-cash operating activities	(335)	370	(200)
Changes in assets and liabilities:
Accounts receivable	(37)	(1,222)	(703)
Inventories	(45)	(121)	(141)
Accounts payable and accrued expenses	(191)	1,318	440
Collateral (paid) received, net	(146)	1,248	(74)
Income taxes	48	(4)	327
Regulatory assets and liabilities, net	439	1,326	634
Pension and non-pension postretirement benefit contributions	(129)	(616)	(665)
Other assets and liabilities	(188)	(905)	(3,777)
Net cash flows provided by operating activities	4,703	4,870	3,012
Cash flows from investing activities
Capital expenditures	(7,408)	(7,147)	(7,981)
Other investing activities	8	0	26
Net cash flows used in investing activities	(7,375)	(6,990)	(3,317)
Cash flows from financing activities
Changes in short-term borrowings	(313)	986	269
Issuance of long-term debt	5,825	6,309	3,481
Retirement of long-term debt	(1,713)	(2,073)	(1,640)
Dividends paid on common stock	(1,433)	(1,334)	(1,497)
Other financing activities	(114)	(102)	(80)
Net cash flows provided by financing activities	2,683	1,591	758
(Decrease) increase in cash, restricted cash, and cash equivalents	11	(529)	453
Cash, restricted cash, and cash equivalents at beginning of period	1,090	1,619	1,166
Cash, restricted cash, and cash equivalents at end of period	1,101	1,090	1,619
Baltimore Gas and Electric Company
Cash flows from operating activities
Net income	485	380	408
Adjustments to reconcile net income to net cash flows used in operating activities:
Depreciation and amortization	654	630	591
Asset impairments	0	48	0
Deferred income taxes and amortization of investment tax credits	66	9	(17)
Other non-cash operating activities	(1)	135	75
Changes in assets and liabilities:
Accounts receivable	89	(197)	30
Inventories	47	(61)	(29)
Accounts payable and accrued expenses	(75)	77	14
Collateral (paid) received, net	(22)	19	3
Income taxes	37	(17)	20
Regulatory assets and liabilities, net	(292)	(160)	(152)
Pension and non-pension postretirement benefit contributions	(19)	(68)	(81)
Other assets and liabilities	(13)	(33)	(120)
Net cash flows provided by operating activities	951	760	729
Cash flows from investing activities
Capital expenditures	(1,367)	(1,262)	(1,226)
Other investing activities	7	11	18
Net cash flows used in investing activities	(1,360)	(1,251)	(1,208)
Cash flows from financing activities
Changes in short-term borrowings	(72)	278	130
Issuance of long-term debt	700	500	600
Retirement of long-term debt	(300)	(250)	(300)
Dividends paid on common stock	(316)	(300)	(292)
Contributions from parent	385	286	257
Other financing activities	(7)	(11)	(6)
Net cash flows provided by financing activities	390	503	389
(Decrease) increase in cash, restricted cash, and cash equivalents	(19)	12	(90)
Cash, restricted cash, and cash equivalents at beginning of period	67	55	145
Cash, restricted cash, and cash equivalents at end of period	48	67	55
Baltimore Gas and Electric Company | Related Party
Changes in assets and liabilities:
Receivables from and payables to affiliates, net	$ (5)	$ (2)	$ (13)