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INFORMATION BY OPERATING SEGMENT (Tables) | 12 Months Ended
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Sep. 30, 2017
Segment Reporting [Abstract] |
Schedule of operating segment information |
| Gas Utility |  | Gas Marketing |  | Other |  | Eliminations |  | Consolidated
2017 |  |  |  |
Revenues from external customers | $ | 1,660.0 |  |  | $ | 79.3 |  |  | $ | 1.4 |  |  | $ | — |  |  | $ | 1,740.7 |
Intersegment revenues | 7.9 |  |  | — |  |  | 6.3 |  |  | (14.2 | ) |  | — |
Total Operating Revenues | 1,667.9 |  |  | 79.3 |  |  | 7.7 |  |  | (14.2 | ) |  | 1,740.7 |
Operating Expenses |  |  |  |  |  |  |  |  |
Gas Utility |  |  |  |  |  |  |  |  |
Natural and propane gas | 645.9 |  |  | — |  |  | — |  |  | (75.4 | ) |  | 570.5 |
Other operation and maintenance | 409.1 |  |  | — |  |  | — |  |  | (4.1 | ) |  | 405.0 |
Depreciation and amortization | 153.5 |  |  | — |  |  | — |  |  | — |  |  | 153.5 |
Taxes, other than income taxes | 137.8 |  |  | — |  |  | — |  |  | — |  |  | 137.8 |
Total Gas Utility Operating Expenses | 1,346.3 |  |  | — |  |  | — |  |  | (79.5 | ) |  | 1,266.8 |
Gas Marketing and Other * | — |  |  | 74.1 |  |  | 12.8 |  |  | 65.3 |  |  | 152.2 |
Total Operating Expenses | 1,346.3 |  |  | 74.1 |  |  | 12.8 |  |  | (14.2 | ) |  | 1,419.0 |
Operating Income (Loss) | $ | 321.6 |  |  | $ | 5.2 |  |  | $ | (5.1 | ) |  | $ | — |  |  | $ | 321.7 |
Net Economic Earnings (Loss) | $ | 181.5 |  |  | $ | 6.8 |  |  | $ | (20.7 | ) |  | $ | — |  |  | $ | 167.6 |
Capital Expenditures | $ | 412.6 |  |  | $ | — |  |  | $ | 25.5 |  |  | $ | — |  |  | $ | 438.1 |
| Gas Utility |  | Gas Marketing |  | Other |  | Eliminations |  | Consolidated
2016 |  |  |  |
Revenues from external customers | $ | 1,457.2 |  |  | $ | 78.5 |  |  | $ | 1.6 |  |  | $ | — |  |  | $ | 1,537.3 |
Intersegment revenues | 2.2 |  |  | — |  |  | 3.2 |  |  | (5.4 | ) |  | — |
Total Operating Revenues | 1,459.4 |  |  | 78.5 |  |  | 4.8 |  |  | (5.4 | ) |  | 1,537.3 |
Operating Expenses |  |  |  |  |  |  |  |  |
Gas Utility |  |  |  |  |  |  |  |  |
Natural and propane gas | 539.7 |  |  | — |  |  | — |  |  | (47.5 | ) |  | 492.2 |
Other operation and maintenance | 379.3 |  |  | — |  |  | — |  |  | (1.8 | ) |  | 377.5 |
Depreciation and amortization | 136.9 |  |  | — |  |  | — |  |  | — |  |  | 136.9 |
Taxes, other than income taxes | 125.2 |  |  | — |  |  | — |  |  | — |  |  | 125.2 |
Total Gas Utility Operating Expenses | 1,181.1 |  |  | — |  |  | — |  |  | (49.3 | ) |  | 1,131.8 |
Gas Marketing and Other * | — |  |  | 66.7 |  |  | 12.6 |  |  | 43.9 |  |  | 123.2 |
Total Operating Expenses | 1,181.1 |  |  | 66.7 |  |  | 12.6 |  |  | (5.4 | ) |  | 1,255.0 |
Operating Income (Loss) | $ | 278.3 |  |  | $ | 11.8 |  |  | $ | (7.8 | ) |  | $ | — |  |  | $ | 282.3 |
Net Economic Earnings (Loss) | $ | 160.3 |  |  | $ | 6.4 |  |  | $ | (17.6 | ) |  | $ | — |  |  | $ | 149.1 |
Capital Expenditures | $ | 291.7 |  |  | $ | — |  |  | $ | 1.6 |  |  | $ | — |  |  | $ | 293.3 |
| Gas Utility |  | Gas Marketing |  | Other |  | Eliminations |  | Consolidated
2015 |  |  |  |
Revenues from external customers | $ | 1,891.8 |  |  | $ | 82.9 |  |  | $ | 1.7 |  |  | $ | — |  |  | $ | 1,976.4 |
Intersegment revenues | 4.0 |  |  | 70.5 |  |  | 2.0 |  |  | (76.5 | ) |  | — |
Total Operating Revenues | 1,895.8 |  |  | 153.4 |  |  | 3.7 |  |  | (76.5 | ) |  | 1,976.4 |
Operating Expenses |  |  |  |  |  |  |  |  |
Gas Utility |  |  |  |  |  |  |  |  |
Natural and propane gas | 957.6 |  |  | — |  |  | — |  |  | (75.2 | ) |  | 882.4 |
Other operation and maintenance | 391.6 |  |  | — |  |  | — |  |  | (1.0 | ) |  | 390.6 |
Depreciation and amortization | 129.9 |  |  | — |  |  | — |  |  | — |  |  | 129.9 |
Taxes, other than income taxes | 142.1 |  |  | — |  |  | — |  |  | — |  |  | 142.1 |
Total Gas Utility Operating Expenses | 1,621.2 |  |  | — |  |  | — |  |  | (76.2 | ) |  | 1,545.0 |
Gas Marketing and Other * | — |  |  | 146.6 |  |  | 12.6 |  |  | (0.3 | ) |  | 158.9 |
Total Operating Expenses | 1,621.2 |  |  | 146.6 |  |  | 12.6 |  |  | (76.5 | ) |  | 1,703.9 |
Operating Income (Loss) | $ | 274.6 |  |  | $ | 6.8 |  |  | $ | (8.9 | ) |  | $ | — |  |  | $ | 272.5 |
Net Economic Earnings (Loss) | $ | 150.4 |  |  | $ | 4.2 |  |  | $ | (16.3 | ) |  | $ | — |  |  | $ | 138.3 |
Capital Expenditures | $ | 284.4 |  |  | $ | — |  |  | $ | 5.4 |  |  | $ | — |  |  | $ | 289.8 |
* | Operating Expenses for “Gas Marketing and Other” include depreciation and amortization for Gas Marketing ($0.1 for 2017, $0.1 for 2016, and $0.3 for 2015) and for Other ($0.5 for 2017, $0.5 for 2016, and $0.6 for 2015).
Total Assets at End of Year | 2017 |  | 2016 |  | 2015
Gas Utility | $ | 5,551.2 |  |  | $ | 5,184.7 |  |  | $ | 4,679.3 |
Gas Marketing | 246.2 |  |  | 205.0 |  |  | 160.6 |
Other | 2,239.5 |  |  | 1,836.6 |  |  | 1,554.5 |
Eliminations | (1,490.2 | ) |  | (1,161.9 | ) |  | (1,116.8 | )
Total Assets | $ | 6,546.7 |  |  | $ | 6,064.4 |  |  | $ | 5,277.6 |
Schedule of the reconciliation of consolidated net economic earnings to consolidated net income |
Reconciliation of Consolidated Net Income to Consolidated Net Economic Earnings | 2017 |  | 2016 |  | 2015
Net Income | $ | 161.6 |  |  | $ | 144.2 |  |  | $ | 136.9 |
Adjustments, pre-tax: |  |  |  |  |
Unrealized loss (gain) on energy-related derivatives | 6.0 |  |  | (0.1 | ) |  | (2.8 | )
Lower of cost or market inventory adjustments | — |  |  | 0.2 |  |  | 0.4 |
Realized (gain) loss on economic hedges prior to the sale of the physical commodity | (0.3 | ) |  | (1.6 | ) |  | 2.4 |
Acquisition, divestiture and restructuring activities | 4.0 |  |  | 9.2 |  |  | 9.8 |
Gain on sale of property | — |  |  | — |  |  | (7.6 | )
Income tax effect of adjustments | (3.7 | ) |  | (2.8 | ) |  | (0.8 | )
Net Economic Earnings | $ | 167.6 |  |  | $ | 149.1 |  |  | $ | 138.3 |

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