Subsequent Events (Exelon and Generation)	3 Months Ended
Mar. 31, 2017
Subsequent Events [Abstract]
Subsequent Events [Text Block]	EGTP, a Delaware limited liability company, was formed in 2014 with the purpose of financing a portfolio of assets comprised of two combined-cycle gas turbines (CCGTs) and three peaking/simple cycle facilities consisting of approximately 3.4 GW of generation capacity in ERCOT North and Houston Zones. EGTP is an indirect wholly owned subsidiary of Exelon and Generation. Each of the aforementioned facilities is held through a wholly-owned direct subsidiary of EGTP. EGTP also owns two equity method investments in shared facility companies. EGTP, its direct parent and its wholly owned subsidiaries secure a nonrecourse senior secured term loan facility, a revolving loan facility and certain commodity and interest rate swaps. EGTP’s operating cash flows have been negatively impacted by certain market conditions including, but not limited to: low power prices, higher fuel prices and the seasonality of its cash flows. Despite the declining operating cash flows, EGTP remained in compliance with its covenants related to the project financing through March 31, 2017. On May 2, 2017, EGTP entered into a consent agreement with its lenders to permit EGTP to draw on its revolving credit facility and initiate an orderly sales process to sell the assets of its wholly-owned subsidiaries, the proceeds from which will first be used to pay the administrative costs of administering the sale, the normal and ordinary costs of operating the plants and repayment of the secured debt of EGTP, including the revolving credit facility. As a result, in the second quarter, Exelon and Generation will reclassify certain EGTP’s assets and liabilities on Exelon’s and Generation’s Consolidated Balance Sheets as held for sale at their respective fair values. Exelon and Generation estimate a pre-tax impairment charge upon reclassification ranging from $300 million to $400 million will be recognized in the second quarter of 2017. See Note 10 - Debt and Credit Agreements for details regarding the nonrecourse debt associated with EGTP. The resolution of this matter has no direct effect on any other Exelon or Generation debt or credit facilities.

EGTP, a Delaware limited liability company, was formed in 2014 with the purpose of financing a portfolio of assets comprised of two combined-cycle gas turbines (CCGTs) and three peaking/simple cycle facilities consisting of approximately 3.4 GW of generation capacity in ERCOT North and Houston Zones. EGTP is an indirect wholly owned subsidiary of Exelon and Generation. Each of the aforementioned facilities is held through a wholly-owned direct subsidiary of EGTP. EGTP also owns two equity method investments in shared facility companies. EGTP, its direct parent and its wholly owned subsidiaries secure a nonrecourse senior secured term loan facility, a revolving loan facility and certain commodity and interest rate swaps.

EGTP’s operating cash flows have been negatively impacted by certain market conditions including, but not limited to: low power prices, higher fuel prices and the seasonality of its cash flows. Despite the declining operating cash flows, EGTP remained in compliance with its covenants related to the project financing through March 31, 2017. On May 2, 2017, EGTP entered into a consent agreement with its lenders to permit EGTP to draw on its revolving credit facility and initiate an orderly sales process to sell the assets of its wholly-owned subsidiaries, the proceeds from which will first be used to pay the administrative costs of administering the sale, the normal and ordinary costs of operating the plants and repayment of the secured debt of EGTP, including the revolving credit facility. As a result, in the second quarter, Exelon and Generation will reclassify certain EGTP’s assets and liabilities on Exelon’s and Generation’s Consolidated Balance Sheets as held for sale at their respective fair values. Exelon and Generation estimate a pre-tax impairment charge upon reclassification ranging from $300 million to $400 million will be recognized in the second quarter of 2017. See Note 10 - Debt and Credit Agreements for details regarding the nonrecourse debt associated with EGTP. The resolution of this matter has no direct effect on any other Exelon or Generation debt or credit facilities.