Consolidated Statements of Operations and Comprehensive Income (Unaudited) - Exelon - USD ($) shares in Millions, $ in Millions		3 Months Ended
		Mar. 31, 2024	Mar. 31, 2023
Operating revenues
Revenues from alternative revenue programs		$ 106	$ 279
Total operating revenues		6,043	5,563
Operating expenses
Operating and maintenance		1,271	1,151
Depreciation and amortization		879	860
Taxes other than income taxes		371	355
Total operating expenses		4,931	4,457
Gain on sales of assets		2	0
Operating income		1,114	1,106
Other income and (deductions)
Interest expense, net		(462)	(406)
Other, net		75	109
Total other income and (deductions)		(393)	(303)
Income (Loss) before income taxes		721	803
Income taxes		63	134
Net income attributable to common shareholders		658	669
Net income		658	669
Other comprehensive income (loss), net of income taxes
Actuarial losses reclassified to periodic benefit cost		5	3
Pension and non-pension postretirement benefit plans valuation adjustments		(24)	(10)
Unrealized gains on cash flow hedges		33	6
Other comprehensive income (loss)		14	(1)
Comprehensive income		$ 672	$ 668
Average shares of common stock outstanding:
Basic average shares of common stock outstanding (in shares)		1,000	995
Assumed exercise and/or distributions of stock-based awards (in shares)	[1]	1	1
Diluted average shares of common stock outstanding (in shares)		1,001	996
Earnings Per Share [Abstract]
Basic earnings per average common share		$ 0.66	$ 0.67
Diluted earnings per average common share		$ 0.66	$ 0.67
PECO Energy Co
Operating revenues
Revenues from alternative revenue programs		$ (2)	$ (4)
Total operating revenues		1,054	1,112
Operating expenses
Operating and maintenance		235	219
Depreciation and amortization		104	98
Taxes other than income taxes		51	50
Total operating expenses		851	902
Gain on sales of assets		2	0
Operating income		205	210
Other income and (deductions)
Interest expense, net		(52)	(45)
Other, net		9	8
Total other income and (deductions)		(46)	(40)
Income (Loss) before income taxes		159	170
Income taxes		10	4
Net income		149	166
Related Party
Other income and (deductions)
Interest expense to affiliates		(6)	(6)
Related Party | PECO Energy Co
Operating expenses
Operating and maintenance from affiliates		58	51
Other income and (deductions)
Interest expense to affiliates		(3)	(3)
Electricity, US Regulated
Operating revenues
Electric operating revenues		5,198	4,462
Operating expenses
Purchased power and/or fuel		2,197	1,733
Electricity, US Regulated | PECO Energy Co
Operating revenues
Electric operating revenues		782	798
Operating expenses
Purchased power and/or fuel		306	330
Natural Gas, US Regulated
Operating revenues
Electric operating revenues		739	822
Operating expenses
Purchased power and/or fuel		213	358
Natural Gas, US Regulated | PECO Energy Co
Operating revenues
Electric operating revenues		272	316
Operating expenses
Purchased power and/or fuel		$ 97	$ 154

[1] The dilutive effects of stock-based compensation awards are calculated using the treasury stock method for all periods presented.