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

Exelon's, 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:

	Nuclear Generation												Transmission
	Quad Cities			Peach Bottom			Salem			Nine Mile Point Unit 2			NJ/DE(a)
Operator	Generation			Generation			PSEG Nuclear			Generation			PSEG/DPL
Ownership interest	75.00		%	50.00		%	42.59		%	82.00		%	various
Exelon’s share as of December 31, 2021:
Plant in service	$	1,211		$	1,515		$	756		$	1,002		$	103
Accumulated depreciation	715			628			299			222			55
Construction work in progress	11			12			20			41			—
Exelon’s share as of December 31, 2020:
Plant in service	$	1,188		$	1,506		$	717		$	990		$	103
Accumulated depreciation	670			601			265			187			54
Construction work in progress	13			13			39			25			—

__________

(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.