Segment Reporting (Tables)

3 Months Ended

Mar. 31, 2021

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment

NSP-Wisconsin's segment information:

	Three Months Ended March 31
(Millions of Dollars)	2021		2020
Regulated Electric
Total revenues (a)	$	224	$	212
Net income	24		25
Regulated Natural Gas
Total revenues	$	57	$	45
Net income	8		9
Consolidated Total
Total revenues (a)	$	281	$	257
Net income	32		34

(a)    Operating revenues include $46 million and $41 million of affiliate electric revenue for the three months ended March 31, 2021 and 2020, respectively.

^[1]

[1] Operating revenues include $46 million and $41 million of affiliate electric revenue for the three months ended March 31, 2021 and 2020, respectively.