Debt and Credit Agreements (Tables)

9 Months Ended

Sep. 30, 2021

Line of Credit Facility [Line Items]

Schedule of Commercial Paper Borrowings [Table Text Block]

The following table reflects the Registrants' commercial paper programs as of September 30, 2021 and December 31, 2020. PECO and BGE had no commercial paper borrowings as of September 30, 2021 and December 31, 2020.

	Outstanding Commercial Paper as of				Average Interest Rate on Commercial Paper Borrowings as of
Commercial Paper Issuer	September 30, 2021		December 31, 2020		September 30, 2021		December 31, 2020
Exelon(a)	$	287	$	1,031	0.19	%	0.25	%
Generation	—		340		—	%	0.27	%
ComEd	—		323		—	%	0.23	%
PHI(b)	287		368		0.19	%	0.24	%
Pepco	40		35		0.15	%	0.22	%
DPL	22		146		0.15	%	0.24	%
ACE	225		187		0.20	%	0.25	%

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(a)Exelon Corporate had no outstanding commercial paper borrowings as of September 30, 2021 and December 31, 2020.

(b)Represents the consolidated amounts of Pepco, DPL, and ACE.

Schedule of Long-term Debt Instruments [Table Text Block]

During the nine months ended September 30, 2021, the following long-term debt was issued:

Company	Type	Interest Rate			Maturity	Amount		Use of Proceeds
Exelon	Long-Term Software License Agreements	3.62	%		December 1, 2025	$	4	Procurement of software licenses.
Generation	West Medway II Nonrecourse Debt	LIBOR + 3%		(a)	March 31, 2026	150		Funding for general corporate purposes.
Generation	Energy Efficiency Project Financing(b)	2.53	%		November 30, 2021	1		Funding to install energy conservation measures for the Fort AP Hill project.
Generation	Energy Efficiency Project Financing(b)	4.24	%		November 30, 2021	1		Funding to install energy conservation measures for the Marine Corps. Logistics Project.
ComEd	First Mortgage Bonds, Series 130	3.13	%		March 15, 2051	700		Repay a portion of outstanding commercial paper obligations and two outstanding term loans, and to fund other general corporate purposes.
ComEd	First Mortgage Bonds, Series 131	2.75	%		September 1, 2051	450		Refinance existing indebtedness and for general corporate purposes.
PECO	First and Refunding Mortgage Bonds	3.05	%		March 15, 2051	375		Funding for general corporate purposes.
PECO	First and Refunding Mortgage Bonds	2.85	%		September 15, 2051	375		Refinance existing indebtedness and for general corporate purposes.
BGE	Senior Notes	2.25	%		June 15, 2031	600		Repay a portion of outstanding commercial paper obligations, repay existing indebtedness, and to fund other general corporate purposes.
Pepco	First Mortgage Bonds	2.32	%		March 30, 2031	150		Repay existing indebtedness and for general corporate purposes.
Pepco	First Mortgage Bonds	3.29	%		September 28, 2051	125		Repay existing indebtedness and for general corporate purposes.
DPL	First Mortgage Bonds	3.24	%		March 30, 2051	125		Repay existing indebtedness and for general corporate purposes.
ACE	First Mortgage Bonds	2.30	%		March 15, 2031	350		Refinance existing indebtedness, repay outstanding commercial paper obligations, and for general corporate purposes.

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(a)The nonrecourse debt has an average blended interest rate.

(b)For Energy Efficiency Project Financing, the maturity dates represent the expected date of project completion, upon which the respective customer assumes the outstanding debt.