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INFORMATION BY OPERATING SEGMENT (Tables)
 3 Months Ended
Dec. 31, 2015
Segment Reporting [Abstract]  
Schedule of operating segment information
 
Gas Utility
 
Gas Marketing
 
Other
 
Eliminations
 
Consolidated
Three Months Ended December 31, 2015
 
 
 
 
 
 
 
 
 
Operating Revenues:
 
 
 
 
 
 
 
 
 
Revenues from external customers
$
398.8

 
$
0.2

 
$
0.4

 
$
—

 
$
399.4

Intersegment revenues
0.7

 
12.6

 
0.4

 
(13.7
)
 
—

Total Operating Revenues
399.5

 
12.8

 
0.8

 
(13.7
)
 
399.4

Operating Expenses:
 
 
 
 
 
 
 
 
 
Gas Utility
 
 
 
 
 
 
 
 
 
Natural and propane gas
161.9

 
—

 
—

 
(13.4
)
 
148.5

Other operation and maintenance
91.9

 
—

 
—

 
(0.3
)
 
91.6

Depreciation and amortization
33.5

 
—

 
—

 
—

 
33.5

Taxes, other than income taxes
28.2

 
—

 
—

 
—

 
28.2

Total Gas Utility Operating Expenses
315.5

 
—

 
—

 
(13.7
)
 
301.8

Gas Marketing and Other
—

 
9.0

 
1.6

 
—

 
10.6

Total Operating Expenses
315.5

 
9.0

 
1.6

 
(13.7
)
 
312.4

Operating Income (Loss)
$
84.0

 
$
3.8

 
$
(0.8
)
 
$
—

 
$
87.0

Net Economic Earnings (Loss)
$
50.0

 
$
(0.3
)
 
$
(4.6
)
 
$
—

 
$
45.1

 
 
 
 
 
 
 
 
 
 
Three Months Ended December 31, 2014
 
 
 
 
 
 
 
 
 
Operating Revenues:
 
 
 
 
 
 
 
 
 
Revenues from external customers
$
581.4

 
$
37.8

 
$
0.4

 
$
—

 
$
619.6

Intersegment revenues
1.0

 
24.4

 
0.5

 
(25.9
)
 
—

Total Operating Revenues
582.4

 
62.2

 
0.9

 
(25.9
)
 
619.6

Operating Expenses:
 
 
 
 
 
 
 
 
 
Gas Utility
 
 
 
 
 
 
 
 
 
Natural and propane gas
329.8

 
—

 
—

 
(25.5
)
 
304.3

Other operation and maintenance
97.4

 
—

 
—

 
(0.3
)
 
97.1

Depreciation and amortization
32.0

 
—

 
—

 
—

 
32.0

Taxes, other than income taxes
38.0

 
—

 
—

 
—

 
38.0

Total Gas Utility Operating Expenses
497.2

 
—

 
—

 
(25.8
)
 
471.4

Gas Marketing and Other
—

 
58.6

 
2.4

 
(0.1
)
 
60.9

Total Operating Expenses
497.2

 
58.6

 
2.4

 
(25.9
)
 
532.3

Operating Income (Loss)
$
85.2

 
$
3.6

 
$
(1.5
)
 
$
—

 
$
87.3

Net Economic Earnings (Loss)
$
49.8

 
$
0.4

 
$
(4.5
)
 
$
—

 
$
45.7



The Company's total assets by segment were as follows:
 
December 31,
 
September 30,
 
December 31,
 
2015
 
2015
 
2014
Total Assets:
Gas Utility
$
4,806.0

 
$
4,686.2

 
$
4,735.6

Gas Marketing
163.8

 
160.6

 
152.7

Other
1,551.1

 
1,560.2

 
1,576.1

Eliminations
(1,109.5
)
 
(1,116.8
)
 
(1,175.9
)
Total Assets
$
5,411.4

 
$
5,290.2

 
$
5,288.5
Schedule of the reconciliation of consolidated net economic earnings to consolidated net income
The following table reconciles the Company's net income to net economic earnings:
 
Three Months Ended December 31,
 
2015
 
2014
Net Income (GAAP)
$
46.9

 
$
47.1

Unrealized gain on energy-related derivative contracts
(3.0
)
 
(3.0
)
Lower of cost or market inventory adjustments
0.3

 
1.2

Acquisition, divestiture and restructuring activities
0.9

 
0.4

Net Economic Earnings (Non-GAAP)
$
45.1

 
$
45.7