Segment Information

Operating results from the regulated electric utility and regulated natural gas utility are each separately and regularly reviewed by NSP-Wisconsin’s chief operating decision maker. NSP-Wisconsin 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-Wisconsin has the following reportable segments: regulated electric utility, regulated natural gas utility and all other.


•	NSP-Wisconsin’s regulated electric utility segment generates, transmits and distributes electricity primarily in portions of Wisconsin and Michigan.


•	NSP-Wisconsin’s regulated natural gas utility segment purchases, transports, stores and distributes natural gas primarily in portions of Wisconsin and Michigan.


•	Revenues from operating segments not included above are below the necessary quantitative thresholds and are therefore included in the all other category. Those primarily include investments in rental housing projects that qualify for low-income housing tax credits.

Asset and capital expenditure information is not provided for NSP-Wisconsin’s reportable segments because as an integrated electric and natural gas utility, NSP-Wisconsin operates significant assets that are not dedicated to a specific business segment, and 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.

To report income from operations for regulated electric and regulated natural gas utility segments, the majority of costs are directly assigned to each segment. However, some costs, such as common depreciation, common operating and maintenance (O&M) expenses and interest expense are allocated based on cost causation allocators. A general allocator is used for certain general and administrative expenses, including office supplies, rent, property insurance and general advertising.



(Thousands of Dollars)	Regulated Electric		Regulated Natural Gas			All Other		Reconciling Eliminations			Consolidated Total
Three Months Ended Sept. 30, 2018
Operating revenues ^(a)	$	240,344	$	15,355		$	298	$	—		$	255,997
Intersegment revenues	112		(33		)	—		(79		)	—
Total revenues	$	240,456	$	15,322		$	298	$	(79	)	$	255,997
Net income (loss)	$	34,256	$	(3,448	)	$	200	$	—		$	31,008



(Thousands of Dollars)	Regulated Electric		Regulated Natural Gas			All Other			Reconciling Eliminations			Consolidated Total
Three Months Ended Sept. 30, 2017
Operating revenues ^(a)	$	232,802	$	14,394		$	315		$	—		$	247,511
Intersegment revenues	144		56			—			(200		)	—
Total revenues	$	232,946	$	14,450		$	315		$	(200	)	$	247,511
Net income (loss)	$	24,594	$	(2,184	)	$	(85	)	$	—		$	22,325


^(a)	Operating revenues include $40 million and $46 million of affiliate electric revenue for the three months ended Sept. 30, 2018 and 2017, respectively.



(Thousands of Dollars)	Regulated Electric		Regulated Natural Gas		All Other		Reconciling Eliminations			Consolidated Total
Nine Months Ended Sept. 30, 2018
Operating revenues ^(a)	$	666,212	$	93,836	$	847	$	—		$	760,895
Intersegment revenues	327		242		—		(569		)	—
Total revenues	$	666,539	$	94,078	$	847	$	(569	)	$	760,895
Net income	$	70,181	$	6,802	$	630	$	—		$	77,613



(Thousands of Dollars)	Regulated Electric		Regulated Natural Gas		All Other		Reconciling Eliminations			Consolidated Total
Nine Months Ended Sept. 30, 2017
Operating revenues ^(a)	$	659,853	$	81,768	$	847	$	—		$	742,468
Intersegment revenues	363		238		—		(601		)	—
Total revenues	$	660,216	$	82,006	$	847	$	(601	)	$	742,468
Net income	$	54,580	$	3,388	$	1,017	$	—		$	58,985


^(a)	Operating revenues include $116 million and $131 million of affiliate electric revenue for the nine months ended Sept. 30, 2018 and 2017, respectively.