INFORMATION BY OPERATING SEGMENT (Tables)

6 Months Ended

Mar. 31, 2017

Segment Reporting [Abstract]

Schedule of operating segment information

	Gas Utility		Gas Marketing			Other			Eliminations			Consolidated
Three Months Ended March 31, 2017
Operating Revenues:
Revenues from external customers	$	641.1	$	22.2		$	0.1		$	—		$	663.4
Intersegment revenues	2.6		—			1.7			(4.3		)	—
Total Operating Revenues	643.7		22.2			1.8			(4.3		)	663.4
Operating Expenses:
Gas Utility
Natural and propane gas	275.6		—			—			(21.3		)	254.3
Operation and maintenance	99.3		—			—			(0.9		)	98.4
Depreciation and amortization	37.9		—			—			—			37.9
Taxes, other than income taxes	48.3		—			—			—			48.3
Total Gas Utility Operating Expenses	461.1		—			—			(22.2		)	438.9
Gas Marketing and Other	—		23.9			2.3			17.9			44.1
Total Operating Expenses	461.1		23.9			2.3			(4.3		)	483.0
Operating Income (Loss)	$	182.6	$	(1.7	)	$	(0.5	)	$	—		$	180.4
Net Economic Earnings (Loss)	$	112.2	$	—		$	(3.2	)	$	—		$	109.0
Three Months Ended March 31, 2016
Operating Revenues:
Revenues from external customers	$	611.5	$	(2.6	)	$	0.4		$	—		$	609.3
Intersegment revenues	1.2		10.6			0.5			(12.3		)	—
Total Operating Revenues	612.7		8.0			0.9			(12.3		)	609.3
Operating Expenses:
Gas Utility
Natural and propane gas	273.0		—			—			(11.9		)	261.1
Operation and maintenance	94.6		—			—			(0.3		)	94.3
Depreciation and amortization	33.8		—			—			—			33.8
Taxes, other than income taxes	43.9		—			—			—			43.9
Total Gas Utility Operating Expenses	445.3		—			—			(12.2		)	433.1
Gas Marketing and Other	—		5.5			3.1			(0.1		)	8.5
Total Operating Expenses	445.3		5.5			3.1			(12.3		)	441.6
Operating Income (Loss)	$	167.4	$	2.5		$	(2.2	)	$	—		$	167.7
Net Economic Earnings (Loss)	$	102.5	$	3.0		$	(2.0	)	$	—		$	103.5

	Gas Utility		Gas Marketing			Other			Eliminations			Consolidated
Six Months Ended March 31, 2017
Operating Revenues:
Revenues from external customers	$	1,113.4	$	43.9		$	1.2		$	—		$	1,158.5
Intersegment revenues	7.0		—			2.4			(9.4		)	—
Total Operating Revenues	1,120.4		43.9			3.6			(9.4		)	1,158.5
Operating Expenses:
Gas Utility
Natural and propane gas	490.1		—			—			(42.0		)	448.1
Operation and maintenance	199.8		—			—			(2.0		)	197.8
Depreciation and amortization	75.6		—			—			—			75.6
Taxes, other than income taxes	81.7		—			—			—			81.7
Total Gas Utility Operating Expenses	847.2		—			—			(44.0		)	803.2
Gas Marketing and Other	—		46.9			4.3			34.6			85.8
Total Operating Expenses	847.2		46.9			4.3			(9.4		)	889.0
Operating Income (Loss)	$	273.2	$	(3.0	)	$	(0.7	)	$	—		$	269.5
Net Economic Earnings (Loss)	$	164.0	$	1.4		$	(8.9	)	$	—		$	156.5
Six Months Ended March 31, 2016
Operating Revenues:
Revenues from external customers	$	1,010.3	$	(2.4	)	$	0.8		$	—		$	1,008.7
Intersegment revenues	1.9		23.2			0.9			(26.0		)	—
Total Operating Revenues	1,012.2		20.8			1.7			(26.0		)	1,008.7
Operating Expenses:
Gas Utility
Natural and propane gas	434.9		—			—			(25.3		)	409.6
Operation and maintenance	186.5		—			—			(0.6		)	185.9
Depreciation and amortization	67.3		—			—			—			67.3
Taxes, other than income taxes	72.1		—			—			—			72.1
Total Gas Utility Operating Expenses	760.8		—			—			(25.9		)	734.9
Gas Marketing and Other	—		14.5			4.7			(0.1		)	19.1
Total Operating Expenses	760.8		14.5			4.7			(26.0		)	754.0
Operating Income (Loss)	$	251.4	$	6.3		$	(3.0	)	$	—		$	254.7
Net Economic Earnings (Loss)	$	152.5	$	2.7		$	(6.6	)	$	—		$	148.6

The Company’s total assets by segment were as follows:

	March 31,			September 30,			March 31,
	2017			2016			2016
Total Assets:
Gas Utility	$	5,290.8		$	5,184.7		$	4,680.2
Gas Marketing	218.2			205.0			156.5
Other	2,199.1			1,836.6			1,516.5
Eliminations	(1,451.4		)	(1,161.9		)	(1,045.7		)
Total Assets	$	6,256.7		$	6,064.4		$	5,307.5

Schedule of the reconciliation of consolidated net economic earnings to consolidated net income

The following table reconciles the Company’s net economic earnings to net income.

	Three Months Ended March 31,						Six Months Ended March 31,
	2017			2016			2017			2016
Net Income	$	108.0		$	100.8		$	153.2		$	147.7
Adjustments, pre-tax:
Unrealized loss (gain) on energy-related derivative contracts	1.6			2.9			5.4			(2.0		)
Lower of cost or market inventory adjustments	0.1			0.1			—			0.7
Realized gain on economic hedges prior to sale of the physical commodity	(0.1		)	(0.5		)	(0.2		)	(0.6		)
Acquisition, divestiture and restructuring activities	0.1			2.0			0.2			3.3
Income tax effect of adjustments	(0.7		)	(1.8		)	(2.1		)	(0.5		)
Net Economic Earnings	$	109.0		$	103.5		$	156.5		$	148.6