Schedule I - Condensed Financial Information of Parent (Exelon Corporate) - Debt and Credit Agreements - Schedule of Debt Maturities (Details) $ in Millions	Dec. 31, 2023 USD ($)
Debt Instrument [Line Items]
2024	$ 1,403
2025	1,327
2026	1,615
2027	1,023
2028	1,990
Thereafter	33,921
Total	41,279
Corporate, Non-Segment
Debt Instrument [Line Items]
2024	500
2025	807
2026	750
2027	650
2028	1,000
Thereafter	7,432
Total	$ 11,139