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Report of Business Segments (Tables)

3 Months Ended

Mar. 31, 2018

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment [Table Text Block]

The following tables summarize the results of the Company's business segments during the three months ended March 31, 2018 and 2017.



Three Months Ended March 31, 2018	Electric Utility			Natural Gas Midstream Operations			Other Operations			Eliminations			Total
(In millions)
Operating revenues	$	492.7		$	—		$	—		$	—		$	492.7
Cost of sales	210.5			—			—			—			210.5
Other operation and maintenance	119.7			0.3			(1.2		)	—			118.8
Depreciation and amortization	78.8			—			—			—			78.8
Taxes other than income	22.7			0.2			1.2			—			24.1
Operating income (loss)	61.0			(0.5		)	—			—			60.5
Equity in earnings of unconsolidated affiliates	—			33.9			—			—			33.9
Other income (expense)	10.6			—			(0.7		)	(0.6		)	9.3
Interest expense	37.3			—			1.9			(0.6		)	38.6
Income tax expense (benefit)	3.0			9.8			(2.7		)	—			10.1
Net income	$	31.3		$	23.6		$	0.1		$	—		$	55.0
Investment in unconsolidated affiliates	$	—		$	1,150.6		$	10.0		$	—		$	1,160.6
Total assets	$	9,303.3		$	1,159.0		$	98.3		$	(124.2	)	$	10,436.4



Three Months Ended March 31, 2017	Electric Utility			Natural Gas Midstream Operations			Other Operations			Eliminations			Total
(In millions)
Operating revenues	$	456.0		$	—		$	—		$	—		$	456.0
Cost of sales	208.7			—			—			—			208.7
Other operation and maintenance	124.7			0.1			(2.7		)	—			122.1
Depreciation and amortization	54.7			—			0.9			—			55.6
Taxes other than income	22.3			0.2			1.4			—			23.9
Operating income	45.6			(0.3		)	0.4			—			45.7
Equity in earnings of unconsolidated affiliates	—			35.6			—			—			35.6
Other income (expense)	11.5			0.1			(1.8		)	(0.1		)	9.7
Interest expense	33.6			—			1.5			(0.1		)	35.0
Income tax expense (benefit)	7.3			15.4			(2.7		)	—			20.0
Net income (loss)	$	16.2		$	20.0		$	(0.2	)	$	—		$	36.0
Investment in unconsolidated affiliates	$	—		$	1,158.9		$	—		$	—		$	1,158.9
Total assets	$	8,950.9		$	1,521.2		$	91.1		$	(428.3	)	$	10,134.9