Property Plant and Equipment Property Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2021

Property, Plant and Equipment [Abstract]

Public Utility Property, Plant, and Equipment

Major classes of property, plant and equipment

(Millions of Dollars)	Dec. 31, 2021		Dec. 31, 2020
Property, plant and equipment, net
Electric plant	$	3,348	$	3,197
Natural gas plant	423		391
Common and other property	233		221
CWIP	134		71
Total property, plant and equipment	4,138		3,880
Less accumulated depreciation	(1,478)		(1,396)
Property, plant and equipment, net	$	2,660	$	2,484

Schedule of Jointly Owned Utility Plants

Jointly owned assets as of Dec. 31, 2021:

(Millions of Dollars, Except Percent Owned)	Plant in Service		Accumulated Depreciation		Percent Owned
Electric transmission:
La Crosse, WI to Madison, WI	$	177	$	15	37	%
CapX2020	169		28		80
Total (a)	$	346	$	43

(a)Projects additionally include $2 million in CWIP.