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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, 2015
USD ($)
Debt Instrument [Line Items]  
2015 $ 1,487
2016 1,841
2017 1,393
2018 973
2019 3,311
Thereafter 16,756 [1]
Total 25,761
Exelon Corporate [Member]  
Debt Instrument [Line Items]  
2015 45
2016 569
2017 0
2018 0
2019 1,450
Thereafter 3,789
Total $ 5,853
[1] Includes $648 million due to ComEd, PECO and BGE financing trusts.