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Schedule I - Condensed Financial Information of Parent (Exelon Corporate) - Debt and Credit Agreements - Schedule of Debt Maturities (Details)
$ in Millions
Dec. 31, 2021
USD ($)
Debt Instrument [Line Items]  
2022 $ 2,153
2023 864
2024 817
2025 1,322
2026 1,611
Thereafter 25,888
Total 32,655
Corporate, Non-Segment [Member]  
Debt Instrument [Line Items]  
2022 1,150
2023 0
2024 0
2025 807
2026 750
Thereafter 4,582
Total $ 7,289