Segments and Related Information (Tables)

12 Months Ended

Dec. 31, 2020

Segment Reporting [Abstract]

Results from Operations by Reportable Segment

PSCo’s segment information:

(Millions of Dollars)	2020		2019		2018
Regulated Electric
Operating revenues - external	$	3,116	$	3,033	$	3,031
Intersegment revenue	1		1		—
Total revenues	$	3,117	$	3,034	$	3,031
Depreciation and amortization	497		455		416
Interest charges and financing costs	173		173		142
Income tax expense	13		45		103
Net income	460		465		429
Regulated Natural Gas
Operating revenues - external	$	1,024	$	1,161	$	1,015
Intersegment revenue	—		—		1
Total revenues	$	1,024	$	1,161	$	1,016
Depreciation and amortization	152		141		140
Interest charges and financing costs	50		50		43
Income tax expense	29		33		13
Net income	126		119		121
All Other
Total revenues (a)	$	43	$	43	$	40
Depreciation and amortization	6		6		5
Interest charges and financing costs	1		1		1
Income tax expense (benefit)	3		2		(3)
Net income (loss)	2		(6)		2
Consolidated Total
Total revenues (a)	$	4,184	$	4,238	$	4,087
Reconciling eliminations	(1)		(1)		(1)
Total operating revenues	$	4,183	$	4,237	$	4,086
Depreciation and amortization	655		602		561
Interest charges and financing costs	224		224		186
Income tax expense	45		80		113
Net income	588		578		552

(a)    Operating revenues include $5 million, $5 million and $4 million of intercompany revenue for the years ended Dec. 31, 2020, 2019 and 2018, respectively. See Note 13 for further information.