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Segment Information
 6 Months Ended
Jun. 30, 2020
Segment Reporting [Abstract]  
Segment Information
NSP-Minnesota evaluates performance based on profit or loss generated from the product or service provided. These segments are managed separately because the revenue streams are dependent upon regulated rate recovery, which is separately determined for each segment.
NSP-Minnesota has the following reportable segments:
•Regulated Electric — The regulated electric utility segment generates electricity which is transmitted and distributed in Minnesota, North Dakota and South Dakota. In addition, this segment includes sales for resale and provides wholesale transmission service to various entities in the United States. The regulated electric utility segment also includes NSP-Minnesota’s wholesale commodity and trading operations; and
•Regulated Natural Gas — The regulated natural gas utility segment transports, stores and distributes natural gas in portions of Minnesota and North Dakota.
NSP-Minnesota presents Other, which includes operating segments with revenues below the necessary quantitative thresholds. Those operating segments primarily include appliance repair services, non-utility real estate activities and revenues associated with processing solid waste into refuse-derived fuel.
Asset and capital expenditure information is not provided for NSP-Minnesota’s reportable segments. As an integrated electric and natural gas utility, NSP-Minnesota operates significant assets that are not dedicated to a specific business segment. Reporting assets and capital expenditures by business segment would require arbitrary and potentially misleading allocations which may not necessarily reflect the assets that would be required for the operation of the business segments on a stand-alone basis. Certain costs, such as common depreciation, common O&M expenses and interest expense are allocated based on cost causation allocators across each segment. In addition, a general allocator is used for certain general and administrative expenses, including office supplies, rent, property insurance and general advertising.
NSP-Minnesota’s segment information for the three and six months ended June 30:
Three Months Ended June 30
(Millions of Dollars)20202019
Regulated Electric
Operating revenues (a)
$1,095.7  $1,097.2  
Intersegment revenues
0.1  0.2  
Total revenue
$1,095.8  $1,097.4  
Net income113.2  93.9  
Regulated Natural Gas
Operating revenues (b)
$75.0  $79.4  
Intersegment revenues
0.1  0.2  
Total revenue
$75.1  $79.6  
Net income0.6  0.3  
All Other
Operating revenues
$9.2  $8.4  
Net income 3.6  1.7  
Consolidated Total
Operating revenues (a)(b)
$1,180.1  $1,185.4  
Reconciling eliminations(0.2) (0.4) 
Total operating revenues$1,179.9  $1,185.0  
Net income117.4  95.9  
(a) Operating revenues include $106.1 million and $116.2 million of affiliate electric revenue for the three months ended June 30, 2020 and 2019.
(b) Operating revenues includes an immaterial amount of affiliate gas revenue for the three months ended June 30, 2020 and 2019.
Six Months Ended June 30
(Millions of Dollars)20202019
Regulated Electric
Operating revenues (a)
$2,131.0  $2,175.9  
Intersegment revenues
0.2  0.3  
Total revenue
$2,131.2  $2,176.2  
Net income199.2  176.8  
Regulated Natural Gas
Operating revenues (b)
$281.1  $343.5  
Intersegment revenues
0.3  0.5  
Total revenue
$281.4  $344.0  
Net income23.9  29.0  
All Other
Operating revenues
$18.0  $16.1  
Net income 1.3  3.3  
Consolidated Total
Operating revenues (a)(b)
$2,430.6  $2,536.3  
Reconciling eliminations(0.5) (0.8) 
Total operating revenues$2,430.1  $2,535.5  
Net income224.4  209.1  
(a) Operating revenues include $215.7 million and $236.3 million of affiliate electric revenue for the six months ended June 30, 2020 and 2019.
(b) Operating revenues includes an immaterial amount of affiliate gas revenue for the six months ended June 30, 2020 and 2019.