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Other Operating Income, Net (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2017
Component of Operating Income [Abstract] |  |  |
Finance charges | $ 16.5 | $ 16.4 | $ 11.8
AFUDC associated with pipeline projects | 0.0 | 0.0 | 5.5
Interest and interest-related income | 5.6 | 3.2 | 1.7
Utility non-tariff service income | 0.7 | 2.8 | 1.5
Loss on private equity partnership investment | (1.5) | 0.0 | (11.0)
Gains (losses) on sales of fixed assets, net | 2.9 | 5.3 | (3.9)
Other, net | 6.9 | 3.6 | 4.9
Total other operating income, net | $ 31.1 | $ 31.3 | $ 10.5

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- Definition Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 + Details
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