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v3.23.1

Note 14 - Information by Operating Segment - Segment Information by Segment (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2020
Revenues from external customers | $ 2,198.5 | $ 2,235.5 | $ 1,855.4
Intersegment revenues | 0.0 | 0.0 | 0.0
Operating Revenues | 2,198.5 | 2,235.5 | 1,855.4
Natural gas | 923.9 | 946.3 | 696.1
Operation and maintenance | 449.6 | 465.8 | 458.6
Depreciation and amortization | 237.3 | 213.1 | 197.3
Taxes, other than income taxes | 179.5 | 160.1 | 148.4
Total Operating Expenses | 1,790.3 | 1,785.3 | 1,649.0
Operating Income | 408.2 | 450.2 | 206.4
Net Economic Earnings (Loss) | 216.3 | 266.3 | 207.8
Capital Expenditures | 552.2 | 624.8 | 638.4
Impairments | 0.0 | 0.0 | 148.6
Intersegment Eliminations [Member] |  |  |
Revenues from external customers | 0.0 | 0.0 | 0.0
Intersegment revenues | (51.7) | (48.0) | (42.3)
Operating Revenues | (51.7) | (48.0) | (42.3)
Natural gas | (36.3) | (34.3) | (29.6)
Operation and maintenance | (15.4) | (13.7) | (12.7)
Depreciation and amortization | 0.0 | 0.0 | 0.0
Taxes, other than income taxes | 0.0 | 0.0 | 0.0
Total Operating Expenses | (51.7) | (48.0) | (42.3)
Operating Income | 0.0 | 0.0 | 0.0
Net Economic Earnings (Loss) | 0.0 | 0.0 | 0.0
Capital Expenditures | (0.6) | 0.0 | 0.0
Impairments |  |  | 0.0
Gas Utility [Member] | Operating Segments [Member] |  |  |
Revenues from external customers | 1,945.6 | 2,118.2 | 1,751.8
Intersegment revenues | 0.5 | 1.1 | 0.2
Operating Revenues | 1,946.1 | 2,119.3 | 1,752.0
Natural gas | 788.8 | 961.7 | 660.2
Operation and maintenance | 413.3 | 422.2 | 421.3
Depreciation and amortization | 227.9 | 204.4 | 189.7
Taxes, other than income taxes | 176.2 | 157.0 | 146.5
Total Operating Expenses | 1,606.2 | 1,745.3 | 1,417.7
Operating Income | 339.9 | 374.0 | 334.3
Net Economic Earnings (Loss) | 202.7 | 230.6 | 213.4
Capital Expenditures | 528.6 | 590.4 | 547.8
Impairments |  |  | 0.0
Gas Marketing [Member] | Operating Segments [Member] |  |  |
Revenues from external customers | 234.9 | 96.5 | 87.9
Intersegment revenues | 0.0 | 0.0 | 0.0
Operating Revenues | 234.9 | 96.5 | 87.9
Natural gas | 171.4 | 18.8 | 65.1
Operation and maintenance | 14.6 | 17.1 | 11.8
Depreciation and amortization | 1.4 | 1.2 | 0.6
Taxes, other than income taxes | 0.6 | 0.9 | 1.1
Total Operating Expenses | 188.0 | 38.0 | 78.6
Operating Income | 46.9 | 58.5 | 9.3
Net Economic Earnings (Loss) | 27.0 | 47.0 | 9.1
Capital Expenditures | 0.9 | 0.7 | 3.6
Impairments |  |  | 0.0
Midstream [Member] | Operating Segments [Member] |  |  |
Revenues from external customers | 17.4 | 19.9 | 14.9
Intersegment revenues | 35.7 | 32.7 | 28.2
Operating Revenues | 53.1 | 52.6 | 43.1
Natural gas | 0.0 | 0.0 | 0.3
Operation and maintenance | 22.2 | 24.2 | 21.9
Depreciation and amortization | 7.5 | 6.9 | 6.5
Taxes, other than income taxes | 2.6 | 2.0 | 1.0
Total Operating Expenses | 32.3 | 33.1 | 170.5
Operating Income | 20.8 | 19.5 | (127.4)
Net Economic Earnings (Loss) | 11.1 | 11.1 | 5.9
Capital Expenditures | 23.3 | 33.0 | 86.3
Impairments |  |  | 140.8
Other Segments [Member] | Operating Segments [Member] |  |  |
Revenues from external customers | 0.6 | 0.9 | 0.8
Intersegment revenues | 15.5 | 14.2 | 13.9
Operating Revenues | 16.1 | 15.1 | 14.7
Natural gas | 0.0 | 0.1 | 0.1
Operation and maintenance | 14.9 | 16.0 | 16.3
Depreciation and amortization | 0.5 | 0.6 | 0.5
Taxes, other than income taxes | 0.1 | 0.2 | (0.2)
Total Operating Expenses | 15.5 | 16.9 | 24.5
Operating Income | 0.6 | (1.8) | (9.8)
Net Economic Earnings (Loss) | (24.5) | (22.4) | (20.6)
Capital Expenditures | $ 0.0 | $ 0.7 | 0.7
Impairments |  |  | $ 7.8

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