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Other Operating Income, Net (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2015
Component of Operating Income [Abstract] |  |  |
Finance charges | $ 11.8 | $ 15.2 | $ 12.7
AFUDC associated with pipeline projects | 5.5 | 3.3 | 0.0
Interest and interest-related income | 1.7 | 0.2 | 0.8
Utility non-tariff service income | 1.5 | 2.6 | 4.8
Loss on private equity partnership investment | (11.0) | 0.0 | 0.0
(Losses) gains on sales of fixed assets, net | (3.9) | 3.3 | 11.1
Other, net | 4.9 | (2.2) | 15.0
Total other operating income, net | $ 10.5 | $ 22.4 | $ 44.4

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- Definition Allowance For Funds Used During Construction, Associated With Pipeline Projects + References No definition available. + Details
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- Definition Finance charges. + References No definition available. + Details
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- Definition This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the cost method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 325 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=75025870&loc=d3e40691-111596 + Details
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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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