Segments and Related Information (Tables)

12 Months Ended

Dec. 31, 2022

Segment Reporting [Abstract]

Results from Operations by Reportable Segment

NSP-Wisconsin’s segment information:

(Millions of Dollars)	2022		2021		2020
Regulated Electric
Operating revenues — external (a)	$	1,002	$	922	$	855
Intersegment revenue	—		—		1
Total revenues	$	1,002	$	922	$	856
Depreciation and amortization	131		120		108
Interest charges and financing costs	38		36		34
Income tax expense	29		27		12
Net income	105		98		98
Regulated Natural Gas
Operating revenues — external	$	198	$	182	$	119
Intersegment revenue	—		1		—
Total revenues	$	198	$	183	$	119
Depreciation and amortization	27		27		48
Interest charges and financing costs	4		4		4
Income tax expense (benefit)	6		2		(20)
Net income	17		7		7
All Other
Total revenues	$	1	$	1	$	—
Income tax expense	—		1		1
Net income	3		3		2
Consolidated Total
Total revenues (a)	$	1,201	$	1,106	$	975
Reconciling eliminations	—		(1)		(1)
Total operating revenues	$	1,201	$	1,105	$	974
Depreciation and amortization	158		147		156
Interest charges and financing costs	42		40		38
Income tax expense (benefit)	35		30		(7)
Net income	125		108		107

(a)    Operating revenues include $202 million, $189 million and $168 million of affiliate electric revenue for the years ended Dec. 31, 2022, 2021 and 2020, respectively. See Note 12 for further information.