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Property, Plant and Equipment (All Registrants)
 12 Months Ended
Dec. 31, 2021
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment (All Registrants) Property, Plant, and Equipment (All Registrants)
The following tables present a summary of property, plant, and equipment by asset category as of December 31, 2021 and 2020:
Asset Category
Exelon(a)
ComEdPECOBGEPHIPepcoDPLACE
December 31, 2021
Electric—transmission and distribution$64,771 $31,077 $10,076 $9,352 $16,062 $10,798 $4,957 $4,882 
Electric—generation29,912 — — — — — — — 
Gas—transportation and distribution7,429 — 3,339 3,712 646 — 806 — 
Common—electric and gas2,335 — 1,005 1,224 201 — 180 — 
Nuclear fuel(b)
5,166 — — — — — — — 
Construction work in progress4,097 918 620 554 1,590 1,118 229 242 
Other property, plant, and equipment(c)
827 99 41 34 107 63 23 25 
Total property, plant, and equipment114,537 32,094 15,081 14,876 18,606 11,979 6,195 5,149 
Less: accumulated depreciation(d)
30,318 6,099 3,964 4,299 2,108 3,875 1,635 1,420 
Property, plant, and equipment, net$84,219 $25,995 $11,117 $10,577 $16,498 $8,104 $4,560 $3,729 
December 31, 2020
Electric—transmission and distribution$60,946 $29,371 $9,462 $8,797 $15,137 $10,264 $4,730 $4,568 
Electric—generation29,725 — — — — — — — 
Gas—transportation and distribution6,733 — 3,098 3,315 591 — 751 — 
Common—electric and gas2,170 — 956 1,138 178 — 180 — 
Nuclear fuel(b)
5,399 — — — — — — — 
Construction work in progress3,576 799 474 627 1,174 824 163 182 
Other property, plant and equipment(c)
762 59 34 29 108 65 23 28 
Total property, plant and equipment109,311 30,229 14,024 13,906 17,188 11,153 5,847 4,778 
Less: accumulated depreciation(d)
26,727 5,672 3,843 4,034 1,811 3,697 1,533 1,303 
Property, plant, and equipment, net$82,584 $24,557 $10,181 $9,872 $15,377 $7,456 $4,314 $3,475 
__________
(a)As of December 31, 2021, includes $19,612 million of Property, plant, and equipment, net related to Generation.
(b)Includes nuclear fuel that is in the fabrication and installation phase of $859 million and $939 million as of December 31, 2021 and 2020, respectively.
(c)Primarily composed of land and non-utility property.
(d)At Exelon, includes accumulated amortization of nuclear fuel in the reactor core of $2,765 million and $2,774 million as of December 31, 2021 and 2020, respectively.
The following table presents the average service life for each asset category in number of years:
Average Service Life (years)
Asset CategoryExelonComEdPECOBGEPHIPepcoDPLACE
Electric - transmission and distribution5-805-805-705-805-755-755-705-65
Electric - generation1-52N/AN/AN/AN/AN/AN/AN/A
Gas - transportation and distribution5-80N/A5-705-805-75N/A5-75N/A
Common - electric and gas4-75N/A5-554-505-75N/A5-75N/A
Nuclear fuel1-8N/AN/AN/AN/AN/AN/AN/A
Other property, plant, and equipment1-6132-505020-503-5033-508-5013-15
Depreciation provisions are based on the estimated useful lives of the stations, which corresponds with the term of the NRC operating licenses for the nuclear units. Beginning August 2020, Byron, Dresden, and Mystic depreciation provisions were based on their announced shutdown dates of September 2021, November 2021, and May 2024, respectively. On September 15, 2021, Generation updated the expected useful lives for Byron and Dresden to reflect the end of the available NRC operating license for each unit. See Note 3 — Regulatory Matters for additional information regarding license renewal and Note 7 — Early Plant Retirements for additional information on the impacts related to Byron, Dresden, and Mystic.
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
ExelonComEdPECOBGEPHIPepcoDPLACE
December 31, 2021
Electric—transmission and distribution2.81 %2.94 %2.28 %2.80 %2.87 %2.56 %2.86 %3.21 %
Electric—generation8.67 %N/AN/AN/AN/AN/AN/AN/A
Gas—transportation and distribution2.13 %N/A1.84 %2.54 %1.47 %N/A1.47 %N/A
Common—electric and gas7.31 %N/A6.34 %7.88 %8.33 %N/A8.69 %N/A
December 31, 2020
Electric—transmission and distribution2.79 %2.95 %2.31 %2.69 %2.81 %2.53 %2.85 %3.08 %
Electric—generation6.11 %N/AN/AN/AN/AN/AN/AN/A
Gas—transportation and distribution2.14 %N/A1.85 %2.56 %1.50 %N/A1.50 %N/A
Common—electric and gas7.01 %N/A6.39 %7.45 %7.36 %N/A6.72 %N/A
December 31, 2019
Electric—transmission and distribution2.80 %2.99 %2.36 %2.60 %2.77 %2.47 %2.86 %2.94 %
Electric—generation4.35 %N/AN/AN/AN/AN/AN/AN/A
Gas—transportation and distribution2.04 %N/A1.89 %2.30 %1.55 %N/A1.55 %N/A
Common—electric and gas7.37 %N/A6.06 %8.30 %8.25 %N/A6.24 %N/A
Capitalized Interest and AFUDC
The following table summarizes capitalized interest and credits to AFUDC by year:
ExelonComEdPECOBGEPHIPepcoDPLACE
December 31, 2021
Capitalized interest$16 $— $— $— $— $— $— $— 
AFUDC debt and equity189 47 34 36 72 59 8 5 
December 31, 2020
Capitalized interest$22 $— $— $— $— $— $— $— 
AFUDC debt and equity150 42 23 30 55 42 6 7 
December 31, 2019
Capitalized interest$24 $— $— $— $— $— $— $— 
AFUDC debt and equity132 32 17 29 54 39 6 9 
See Note 1 — Significant Accounting Policies for additional information regarding property, plant and equipment policies. See Note 17 — Debt and Credit Agreements for additional information regarding Exelon’s, ComEd’s, PECO's, Pepco's, DPL's, and ACE’s property, plant and equipment subject to mortgage liens.