Property Plant and Equipment Property Plant and Equipment

12 Months Ended

Dec. 31, 2020

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment Disclosure

Major classes of property, plant and equipment

(Millions of Dollars)	Dec. 31, 2020		Dec. 31, 2019
Property, plant and equipment, net
Electric plant	$	3,197	$	3,025
Natural gas plant	391		365
Common and other property	221		201
CWIP	71		83
Total property, plant and equipment	3,880		3,674
Less accumulated depreciation	(1,396)		(1,315)
Property, plant and equipment, net	$	2,484	$	2,359

Joint Ownership of Transmission Facilities

Jointly owned assets as of Dec. 31, 2020:

(Millions of Dollars, Except Percent Owned)	Plant in Service		Accumulated Depreciation		CWIP		Percent Owned
Electric transmission:
La Crosse, WI to Madison, WI	$	188	$	12	$	—	37	%
CapX2020	169		23		—		80
Total	$	357	$	35	$	—

NSP-Wisconsin’s share of operating expenses and construction expenditures is included in the applicable utility accounts. Respective owners are responsible for providing their own financing.