Property Plant and Equipment Property Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2023

Property, Plant and Equipment [Abstract]

Public Utility Property, Plant, and Equipment

Major classes of property, plant and equipment

(Millions of Dollars)	Dec. 31, 2023		Dec. 31, 2022
Property, plant and equipment, net
Electric plant	$	3,845	$	3,579
Natural gas plant	502		465
Common and other property	278		260
CWIP	252		174
Total property, plant and equipment	4,877		4,478
Less accumulated depreciation	(1,640)		(1,564)
Property, plant and equipment, net	$	3,237	$	2,914

Schedule of Jointly Owned Utility Plants

Jointly owned assets as of Dec. 31, 2023:

(Millions of Dollars, Except Percent Owned)	Plant in Service		Accumulated Depreciation		Percent Owned
Electric transmission:
La Crosse, WI to Madison, WI	$	178	$	25	37	%
CapX2020	169		39		80
Total (a)	$	347	$	64

(a)Projects additionally include $1 million in CWIP.