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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, 2016
USD ($)
Debt Instrument [Line Items]  
2017 $ 2,430
2018 1,742
2019 1,060
2020 3,331
2021 2,400
Thereafter 22,996 [1]
Total 33,959
Exelon Corporate [Member]  
Debt Instrument [Line Items]  
2017 570
2018 0
2019 0
2020 1,450
2021 300
Thereafter 5,288
Total $ 7,608
[1] Includes $648 million due to ComEd, PECO and BGE financing trusts.