Revenues (Tables)

3 Months Ended

Mar. 31, 2021

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

NSP-Minnesota’s operating revenues consisted of the following:

	Three Months Ended March 31, 2021
(Millions of Dollars)	Electric		Natural Gas		All Other		Total
Major revenue types
Revenue from contracts with customers:
Residential	$	326	$	114	$	7	$	447
C&I	416		79		—		495
Other	8		—		2		10
Total retail	750		193		9		952
Wholesale	98		—		—		98
Transmission	57		—		—		57
Interchange	115		—		—		115
Other	2		—		—		2
Total revenue from contracts with customers	1,022		193		9		1,224
Alternative revenue and other	117		11		—		128
Total revenues	$	1,139	$	204	$	9	$	1,352

	Three Months Ended March 31, 2020
(Millions of Dollars)	Electric		Natural Gas		All Other		Total
Major revenue types
Revenue from contracts with customers:
Residential	$	300	$	114	$	7	$	421
C&I	445		82		—		527
Other	7		—		2		9
Total retail	752		196		9		957
Wholesale	45		—		—		45
Transmission	56		—		—		56
Interchange	110		—		—		110
Other	2		1		—		3
Total revenue from contracts with customers	965		197		9		1,171
Alternative revenue and other	70		9		—		79
Total revenues	$	1,035	$	206	$	9	$	1,250