Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2020

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

The following tables present a summary of property, plant, and equipment by asset category as of December 31, 2020 and 2019:

Asset Category	Exelon		Generation		ComEd		PECO		BGE		PHI		Pepco		DPL		ACE
December 31, 2020
Electric—transmission and distribution	$	60,946	$	—	$	29,371	$	9,462	$	8,797	$	15,137	$	10,264	$	4,730	$	4,568
Electric—generation	29,725		29,724		—		—		—		—		—		—		—
Gas—transportation and distribution	6,733		—		—		3,098		3,315		591		—		751		—
Common—electric and gas	2,170		—		—		956		1,138		178		—		180		—
Nuclear fuel(a)	5,399		5,399		—		—		—		—		—		—		—
Construction work in progress	3,576		450		799		474		627		1,174		824		163		182
Other property, plant, and equipment(b)	762		11		59		34		29		108		65		23		28
Total property, plant, and equipment	109,311		35,584		30,229		14,024		13,906		17,188		11,153		5,847		4,778
Less: accumulated depreciation(c)	26,727		13,370		5,672		3,843		4,034		1,811		3,697		1,533		1,303
Property, plant, and equipment, net	$	82,584	$	22,214	$	24,557	$	10,181	$	9,872	$	15,377	$	7,456	$	4,314	$	3,475
December 31, 2019
Electric—transmission and distribution	$	56,809	$	—	$	27,566	$	8,957	$	8,326	$	13,809	$	9,734	$	4,464	$	4,207
Electric—generation	29,839		29,839		—		—		—		—		—		—		—
Gas—transportation and distribution	6,147		—		—		2,899		2,999		525		—		690		—
Common—electric and gas	1,907		—		—		877		991		146		—		160		—
Nuclear fuel(a)	5,656		5,656		—		—		—		—		—		—		—
Construction work in progress	3,055		702		662		250		483		921		628		125		166
Other property, plant and equipment(b)	799		13		47		27		25		108		64		21		27
Total property, plant and equipment	104,212		36,210		28,275		13,010		12,824		15,509		10,426		5,460		4,400
Less: accumulated depreciation(c)	23,979		12,017		5,168		3,718		3,834		1,213		3,517		1,425		1,210
Property, plant, and equipment, net	$	80,233	$	24,193	$	23,107	$	9,292	$	8,990	$	14,296	$	6,909	$	4,035	$	3,190

__________

(a)Includes nuclear fuel that is in the fabrication and installation phase of $939 million and $1,025 million at December 31, 2020 and 2019, respectively.

(b)Primarily composed of land and non-utility property.

(c)Includes accumulated amortization of nuclear fuel in the reactor core at Generation of $2,774 million and $2,867 million as of December 31, 2020 and 2019, respectively.

The following table presents the average service life for each asset category in number of years:

	Average Service Life (years)
Asset Category	Exelon	Generation	ComEd	PECO	BGE	PHI	Pepco	DPL	ACE
Electric - transmission and distribution	5-80	N/A	5-80	5-70	5-80	5-75	5-75	5-70	5-65
Electric - generation	1-58	1-58	N/A	N/A	N/A	N/A	N/A	N/A	N/A
Gas - transportation and distribution	5-80	N/A	N/A	5-70	5-80	5-75	N/A	5-75	N/A
Common - electric and gas	4-75	N/A	N/A	5-55	4-50	5-75	N/A	5-75	N/A
Nuclear fuel	1-8	1-8	N/A	N/A	N/A	N/A	N/A	N/A	N/A
Other property, plant, and equipment	1-50	1-10	33-50	50	20-50	3-50	25-50	8-50	13-15

Property Plant And Equipment Average Service Life Percentage By Asset Category Table

The following table presents the annual depreciation rates for each asset category. Nuclear fuel amortization is charged to fuel expense using the unit-of-production method and not included in the below table.

	Annual Depreciation Rates
	Exelon		Generation		ComEd		PECO		BGE		PHI		Pepco		DPL		ACE
December 31, 2020
Electric—transmission and distribution	2.79	%	N/A		2.95	%	2.31	%	2.69	%	2.81	%	2.53	%	2.85	%	3.08	%
Electric—generation	6.11	%	6.11	%	N/A		N/A		N/A		N/A		N/A		N/A		N/A
Gas—transportation and distribution	2.14	%	N/A		N/A		1.85	%	2.56	%	1.50	%	N/A		1.50	%	N/A
Common—electric and gas	7.01	%	N/A		N/A		6.39	%	7.45	%	7.36	%	N/A		6.72	%	N/A
December 31, 2019
Electric—transmission and distribution	2.80	%	N/A		2.99	%	2.36	%	2.60	%	2.77	%	2.47	%	2.86	%	2.94	%
Electric—generation	4.35	%	4.35	%	N/A		N/A		N/A		N/A		N/A		N/A		N/A
Gas—transportation and distribution	2.04	%	N/A		N/A		1.89	%	2.30	%	1.55	%	N/A		1.55	%	N/A
Common—electric and gas	7.37	%	N/A		N/A		6.06	%	8.30	%	8.25	%	N/A		6.24	%	N/A
December 31, 2018
Electric—transmission and distribution	2.73	%	N/A		2.95	%	2.35	%	2.61	%	2.61	%	2.40	%	2.77	%	2.45	%
Electric—generation	5.37	%	5.37	%	N/A		N/A		N/A		N/A		N/A		N/A		N/A
Gas—transportation and distribution	2.07	%	N/A		N/A		1.90	%	2.36	%	1.59	%	N/A		1.59	%	N/A
Common—electric and gas	6.98	%	N/A		N/A		5.44	%	8.50	%	6.30	%	N/A		3.70	%	N/A

Schedule Of Capitalized Interest And AFUDC

The following table summarizes capitalized interest and credits to AFUDC by year:

	Exelon		Generation		ComEd		PECO		BGE		PHI		Pepco		DPL		ACE
December 31, 2020
Capitalized interest	$	22	$	22	$	—	$	—	$	—	$	—	$	—	$	—	$	—
AFUDC debt and equity	150		—		42		23		30		55		42		6		7
December 31, 2019
Capitalized interest	$	24	$	24	$	—	$	—	$	—	$	—	$	—	$	—	$	—
AFUDC debt and equity	132		—		32		17		29		54		39		6		9
December 31, 2018
Capitalized interest	$	31	$	31	$	—	$	—	$	—	$	—	$	—	$	—	$	—
AFUDC debt and equity	109		—		30		12		24		44		34		4		4