Segment Reporting (Tables)

3 Months Ended

Mar. 31, 2022

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment

NSP-Wisconsin's segment information:

	Three Months Ended March 31
(Millions of Dollars)	2022		2021
Regulated Electric
Total revenues (a)	$	250	$	224
Net income	32		24
Regulated Natural Gas
Total revenues	$	78	$	57
Net income	15		8
Consolidated Total
Total revenues (a)	$	328	$	281
Net income	47		32

(a)Total revenues include $47 million and $46 million of affiliate electric revenue for the three months ended March 31, 2022 and 2021, respectively.