Report of Business Segments

The Company reports its operations in two business segments: (i) the electric utility segment, which is engaged in the generation, transmission, distribution and sale of electric energy and (ii) the natural gas midstream operations segment.

Intersegment revenues are recorded at prices comparable to those of unaffiliated customers and are affected by regulatory considerations.

The following tables summarize the results of the Company's business segments during the three and nine months ended September 30, 2017 and 2016.



Three Months Ended September 30, 2017	Electric Utility		Natural Gas Midstream Operations			Other Operations			Eliminations			Total
(In millions)
Operating revenues	$	716.8	$	—		$	—		$	—		$	716.8
Cost of sales	255.7		—			—			—			255.7
Other operation and maintenance	120.2		(0.8		)	(1.7		)	—			117.7
Depreciation and amortization	76.2		—			0.7			—			76.9
Taxes other than income	21.7		0.5			1.0			—			23.2
Operating income	243.0		0.3			—			—			243.3
Equity in earnings of unconsolidated affiliates	—		33.6			—			—			33.6
Other income	24.7		—			0.3			(0.2		)	24.8
Interest expense	34.5		—			1.6			(0.2		)	35.9
Income tax expense (benefit)	71.7		12.6			(1.9		)	—			82.4
Net income	$	161.5	$	21.3		$	0.6		$	—		$	183.4
Investment in unconsolidated affiliates	$	—	$	1,152.9		$	5.2		$	—		$	1,158.1
Total assets	$	9,230.9	$	1,503.9		$	87.1		$	(358.2	)	$	10,463.7



Three Months Ended September 30, 2016	Electric Utility		Natural Gas Midstream Operations			Other Operations			Eliminations			Total
(In millions)
Operating revenues	$	743.9	$	—		$	—		$	—		$	743.9
Cost of sales	269.8		—			—			—			269.8
Other operation and maintenance	115.2		(0.1		)	(2.0		)	—			113.1
Depreciation and amortization	80.8		—			1.4			—			82.2
Taxes other than income	20.9		—			0.6			—			21.5
Operating income	257.2		0.1			—			—			257.3
Equity in earnings of unconsolidated affiliates	—		34.5			—			—			34.5
Other income	6.0		—			0.3			—			6.3
Interest expense	34.3		—			1.1			—			35.4
Income tax expense (benefit)	69.0		12.1			(2.0		)	—			79.1
Net income	$	159.9	$	22.5		$	1.2		$	—		$	183.6
Investment in unconsolidated affiliates	$	—	$	1,168.0		$	—		$	—		$	1,168.0
Total assets	$	8,511.5	$	1,503.1		$	93.3		$	(323.9	)	$	9,784.0



Nine Months Ended September 30, 2017	Electric Utility		Natural Gas Midstream Operations			Other Operations			Eliminations			Total
(In millions)
Operating revenues	$	1,759.2	$	—		$	—		$	—		$	1,759.2
Cost of sales	696.5		—			—			—			696.5
Other operation and maintenance	362.8		(0.5		)	(5.8		)	—			356.5
Depreciation and amortization	204.6		—			2.6			—			207.2
Taxes other than income	64.2		1.0			3.2			—			68.4
Operating income (loss)	431.1		(0.5		)	—			—			430.6
Equity in earnings of unconsolidated affiliates	—		98.6			—			—			98.6
Other income (expense)	53.2		0.1			(1.0		)	(0.3		)	52.0
Interest expense	103.7		—			4.6			(0.3		)	108.0
Income tax expense (benefit)	116.7		38.6			(6.3		)	—			149.0
Net income	$	263.9	$	59.6		$	0.7		$	—		$	324.2
Investment in unconsolidated affiliates	$	—	$	1,152.9		$	5.2		$	—		$	1,158.1
Total assets	$	9,230.9	$	1,503.9		$	87.1		$	(358.2	)	$	10,463.7



Nine Months Ended September 30, 2016	Electric Utility		Natural Gas Midstream Operations			Other Operations			Eliminations			Total
(In millions)
Operating revenues	$	1,728.4	$	—		$	—		$	—		$	1,728.4
Cost of sales	645.4		—			—			—			645.4
Other operation and maintenance	356.3		7.9			(9.6		)	—			354.6
Depreciation and amortization	235.9		—			4.9			—			240.8
Taxes other than income	63.6		—			2.9			—			66.5
Operating income (loss)	427.2		(7.9		)	1.8			—			421.1
Equity in earnings of unconsolidated affiliates	—		79.5			—			—			79.5
Other income (expense)	18.3		—			(0.8		)	(0.2		)	17.3
Interest expense	104.8		—			3.1			(0.2		)	107.7
Income tax expense (benefit)	102.4		31.5			(4.0		)	—			129.9
Net income	$	238.3	$	40.1		$	1.9		$	—		$	280.3
Investment in unconsolidated affiliates	$	—	$	1,168.0		$	—		$	—		$	1,168.0
Total assets	$	8,511.5	$	1,503.1		$	93.3		$	(323.9	)	$	9,784.0