Jointly Owned Electric Utility Plant (Tables)

12 Months Ended

Dec. 31, 2021

Public Utilities, Property, Plant and Equipment [Abstract]

Schedule of Jointly Owned Utility Plants

PECO's, DPL's, and ACE's material undivided ownership interests in jointly owned electric plants and transmission facilities as of December 31, 2021 and 2020 were as follows:

	Transmission
	NJ/DE(a)
Operator	PSEG/DPL
Ownership interest	various
Exelon’s share as of December 31, 2021:
Plant in service	$	103
Accumulated depreciation	55
Exelon’s share as of December 31, 2020:
Plant in service	$	103
Accumulated depreciation	54

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(a)PECO, DPL, and ACE own a 42.55%, 1%, and 13.9% share, respectively in 151.3 miles of 500kV lines located in New Jersey and of the Salem generating plant substation. PECO, DPL, and ACE also own a 42.55%, 7.45%, and 7.45% share, respectively, in 2.5 miles of 500kV line located over the Delaware River. ACE also has a 21.78% share in a 500kV New Freedom Switching substation.