Utility Plant and Nonutility Property (Tables)

12 Months Ended

Dec. 31, 2019

Utility Plant And Non Utility Property [Abstract]

Property, Plant and Equipment

Major classes of utility plant and other property and their respective balances at December 31, 2019 and 2018 were as follows:

At December 31,	2019		2018
(millions)
Gross utility plant:
Generation	$	5,765	$	5,751
Transmission		1,905		1,758
Distribution		4,685		4,456
Storage		73		74
General and other		549		535
Intangible		231		229
Construction work in progress		339		350
Nuclear fuel		608		611
Total gross utility plant	$	14,155	$	13,764
Gross nonutility property	$	75	$	73

Schedule of Jointly Owned Utility Plants

At December 31,	2019			2018
	Summer Unit 1			Summer Unit 1
Percent owned	66.7%			66.7%
Plant in service	$	1.4	billion	$	1.5	billion
Accumulated depreciation	$	684	million	$	644	million
Construction work in progress	$	79	million	$	128	million