Jointly Owned Electric Utility Plant (Exelon, Generation, PECO, DPL and ACE)

12 Months Ended

Dec. 31, 2019

Public Utilities, Property, Plant and Equipment [Abstract]

Jointly Owned Electric Utility Plant (Exelon, Generation, PECO, DPL and ACE)

Exelon's, Generation's, PECO's, DPL's and ACE's material undivided ownership interests in jointly owned electric plants and transmission facilities at December 31, 2019 and 2018 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 at December 31, 2019:
Plant in service	$	1,161		$	1,466		$	663		$	951		$	102
Accumulated depreciation	627			571			249			156			53
Construction work in progress	13			21			53			27			—
Exelon’s share at December 31, 2018:
Plant in service	$	1,131		$	1,451		$	648		$	910		$	103
Accumulated depreciation	587			523			227			126			53
Construction work in progress	13			15			44			56			—

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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.

Exelon’s, Generation’s, PECO's, DPL's and ACE's undivided ownership interests are financed with their funds and all operations are accounted for as if such participating interests were wholly owned facilities. Exelon’s, Generation’s, PECO's, DPL's and ACE's share of direct expenses of the jointly owned plants are included in Purchased power and fuel and Operating and maintenance expenses in Exelon’s and Generation’s Consolidated Statements of Operations and Comprehensive Income and in Operating and maintenance expenses in PECO's, PHI's, DPL's and ACE's Consolidated Statements of Operations and Comprehensive Income.