Consolidated Statements of Operations and Comprehensive Income - ComEd - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Operating revenues
Revenues from alternative revenue programs	$ 696	$ 161	$ 171
Total operating revenues	21,727	19,078	17,938
Operating expenses
Operating and maintenance	4,559	4,673	4,547
Depreciation and amortization	3,506	3,325	3,033
Taxes other than income taxes	1,408	1,390	1,291
Total operating expenses	17,714	15,761	15,256
Gain (loss) on sale of assets and businesses	10	(2)	0
Operating income	4,023	3,315	2,682
Other income and (deductions)
Interest expense, net	(1,704)	(1,422)	(1,264)
Other, net	408	535	261
Total other income and (deductions)	(1,321)	(912)	(1,028)
Income before income taxes	2,702	2,403	1,654
Income taxes	374	349	38
Net income	2,328	2,171	1,829
Comprehensive income	2,240	2,260	2,479
Related Party
Operating expenses
Purchased power and/or fuel from affiliates	0	159	1,178
Other income and (deductions)
Interest Expense to Affiliates	(25)	(25)	(25)
Commonwealth Edison Co
Operating revenues
Revenues from alternative revenue programs	556	267	42
Operating revenues from affiliates	16	16	41
Total operating revenues	7,844	5,761	6,406
Operating expenses
Operating and maintenance	1,096	1,094	1,048
Depreciation and amortization	1,403	1,323	1,205
Taxes other than income taxes	369	374	320
Total operating expenses	6,038	4,218	5,151
Gain (loss) on sale of assets and businesses	0	(2)	0
Operating income	1,806	1,541	1,255
Other income and (deductions)
Interest expense, net	(464)	(401)	(376)
Other, net	75	54	48
Total other income and (deductions)	(402)	(360)	(341)
Income before income taxes	1,404	1,181	914
Income taxes	314	264	172
Net income	1,090	917	742
Comprehensive income	1,090	917	742
Commonwealth Edison Co | Related Party
Operating revenues
Operating revenues from affiliates	16	16	41
Operating expenses
Purchased power and/or fuel from affiliates	0	59	383
Operating and maintenance from affiliates	354	318	307
Other income and (deductions)
Interest Expense to Affiliates	(13)	(13)	(13)
Electricity, US Regulated
Operating revenues
Operating revenues	19,267	16,899	16,245
Operating expenses
Purchased power and/or fuel	7,648	5,380	4,703
Electricity, US Regulated | Commonwealth Edison Co
Operating revenues
Operating revenues	7,272	5,478	6,323
Operating expenses
Purchased power and/or fuel	2,816	1,050	1,888
Natural Gas, US Regulated
Operating revenues
Operating revenues	1,764	2,018	1,522
Operating expenses
Purchased power and/or fuel	$ 593	$ 834	$ 504