SEGMENT INFORMATION

At September 30, 2017, we reported six segments, which are described below.


•	The Wisconsin segment includes the electric and natural gas utility operations of WE, WG, and WPS, including WE's and WPS's electric and natural gas operations in the state of Michigan that were transferred to UMERC effective January 1, 2017.


•	The Illinois segment includes the natural gas utility and non-utility operations of PGL and NSG.


•	The other states segment includes the natural gas utility and non-utility operations of MERC and MGU.


•	The electric transmission segment includes our approximate 60% ownership interest in ATC, a for-profit, electric transmission company regulated by the FERC and certain state regulatory commissions.


•	Following the acquisition of Bluewater, our We Power segment was renamed the non-utility energy infrastructure segment. This segment includes We Power, which owns and leases generating facilities to WE, and Bluewater, which owns underground natural gas storage facilities in Michigan. See Note 2, Acquisitions, for more information on the Bluewater transaction.

•

The corporate and other segment includes the operations of the WEC Energy Group holding company, the Integrys holding company, the Peoples Energy, LLC holding company, Wispark LLC, Bostco, Wisvest, Wisconsin Energy Capital Corporation, WBS, WPS Power Development LLC, and ITF. In the first quarter of 2017, we sold substantially all of the remaining assets of Bostco and in the second quarter of 2016, we sold certain assets of Wisvest. The sale of ITF was completed in the first quarter of 2016. See Note 3, Dispositions, for more information on these sales.

All of our operations are located within the United States. The following tables show summarized financial information related to our reportable segments for the three and nine months ended September 30, 2017 and 2016:



	Utility Operations
(in millions)	Wisconsin		Illinois		Other States			Total Utility Operations		Electric Transmission		Non-Utility Energy Infrastructure		Corporate and Other			Reconciling Eliminations			WEC Energy Group Consolidated
Three Months Ended
September 30, 2017
External revenues	$	1,401.3	$	187.2	$	49.8		$	1,638.3	$	—	$	13.6	$	5.6		$	—		$	1,657.5
Intersegment revenues	—		—		—			—		—		111.6		—			(111.6		)	—
Other operation and maintenance	458.3		100.8		21.6			580.7		—		1.5		(1.5		)	(109.0		)	471.7
Depreciation and amortization	131.5		38.9		6.3			176.7		—		18.2		6.3			—			201.2
Operating income (loss)	279.7		12.5		(3.1		)	289.1		—		103.4		1.1			—			393.6
Equity in earnings of transmission affiliate	—		—		—			—		39.2		—		—			—			39.2
Interest expense	48.5		11.0		2.3			61.8		—		16.2		25.4			0.4			103.8



	Utility Operations
(in millions)	Wisconsin		Illinois		Other States			Total Utility Operations		Electric Transmission		Non-Utility Energy Infrastructure		Corporate and Other			Reconciling Eliminations			WEC Energy Group Consolidated
Three Months Ended
September 30, 2016
External revenues	$	1,470.6	$	181.8	$	49.9		$	1,702.3	$	—	$	6.2	$	4.0		$	—		$	1,712.5
Intersegment revenues	—		—		—			—		—		105.0		—			(105.0		)	—
Other operation and maintenance	498.2		105.9		21.2			625.3		—		0.4		(3.2		)	(105.0		)	517.5
Depreciation and amortization	124.5		33.5		5.2			163.2		—		17.1		11.3			—			191.6
Operating income (loss)	299.1		11.7		(1.0		)	309.8		—		93.7		(4.5		)	—			399.0
Equity in earnings of transmission affiliate	—		—		—			—		38.3		—		—			—			38.3
Interest expense	44.6		9.3		1.9			55.8		—		15.6		29.7			(2.0		)	99.1



	Utility Operations
(in millions)	Wisconsin		Illinois		Other States		Total Utility Operations		Electric Transmission		Non-Utility Energy Infrastructure		Corporate and Other			Reconciling Eliminations			WEC Energy Group Consolidated
Nine Months Ended
September 30, 2017
External revenues	$	4,316.6	$	965.7	$	273.4	$	5,555.7	$	—	$	26.1	$	11.7		$	—		$	5,593.5
Intersegment revenues	—		—		—		—		—		333.2		—			(333.2		)	—
Other operation and maintenance	1,379.9		326.6		73.2		1,779.7		—		4.6		(0.3		)	(330.6		)	1,453.4
Depreciation and amortization	391.1		112.6		18.4		522.1		—		53.1		18.3			—			593.5
Operating income (loss)	835.6		209.3		35.0		1,079.9		—		299.5		(6.3		)	—			1,373.1
Equity in earnings of transmission affiliate	—		—		—		—		122.9		—		—			—			122.9
Interest expense	145.4		33.0		6.5		184.9		—		46.7		81.3			(2.5		)	310.4



	Utility Operations
(in millions)	Wisconsin		Illinois		Other States		Total Utility Operations		Electric Transmission		Non-Utility Energy Infrastructure		Corporate and Other			Reconciling Eliminations			WEC Energy Group Consolidated
Nine Months Ended
September 30, 2016
External revenues	$	4,354.9	$	853.1	$	262.3	$	5,470.3	$	—	$	18.7	$	20.3		$	—		$	5,509.3
Intersegment revenues	0.3		—		—		0.3		—		317.1		—			(317.4		)	—
Other operation and maintenance	1,477.3		340.0		80.6		1,897.9		—		3.5		(13.0		)	(317.4		)	1,571.0
Depreciation and amortization	370.1		99.4		15.5		485.0		—		51.1		33.4			—			569.5
Operating income (loss)	841.3		171.3		33.1		1,045.7		—		281.1		(6.4		)	—			1,320.4
Equity in earnings of transmission affiliate	—		—		—		—		107.7		—		—			—			107.7
Interest expense	133.5		28.8		6.5		168.8		—		46.8		91.2			(6.7		)	300.1