Segment Reporting (Tables)

9 Months Ended

Sep. 30, 2023

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment

NSP-Wisconsin's segment information:

	Three Months Ended Sept. 30
(Millions of Dollars)	2023		2022
Regulated Electric
Total revenues (a)	$	263	$	274
Net income	32		42
Regulated Natural Gas
Total revenues	$	15	$	20
Net loss	(3)		(3)
All Other
Total revenues	$	1	$	—
Net income	$	2	$	1
Consolidated Total
Total operating revenues (a)	$	279	$	294
Net income	31		40

(a)Total revenues include $50 million and $51 million of affiliate electric revenue for the three months ended Sept. 30, 2023 and 2022, respectively.

	Nine Months Ended Sept. 30
(Millions of Dollars)	2023		2022
Regulated Electric
Total revenues (a)	$	753	$	767
Net income	95		89
Regulated Natural Gas
Operating revenues	$	116	$	133
Intersegment revenue	1		—
Total revenues	$	117	$	133
Net income	5		11
All Other
Total revenues	$	1	$	—
Net income	$	2	$	2
Consolidated Total
Operating revenues (a)	$	871	$	900
Reconciling eliminations	(1)		—
Total operating revenues	$	870	$	900
Net income	102		102

(a)Total revenues include $151 million and $150 million of affiliate electric revenue for the nine months ended Sept. 30, 2023 and 2022, respectively.