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Inventories - Schedule of Inventories (Details) - USD ($) $ in Millions | Sep. 30, 2015 | Sep. 30, 2014
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Public Utilities, Inventory |  |
Total inventories | $ 239.9 | $ 423.0
Non-utility LPG and Natural Gas |  |
Public Utilities, Inventory |  |
Total inventories | 140.7 | 283.6
Gas Utility Natural Gas |  |
Public Utilities, Inventory |  |
Total inventories | 37.5 | 82.7
Materials, Supplies and Other |  |
Public Utilities, Inventory |  |
Total inventories | $ 61.7 | $ 56.7

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- Definition Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.6(a)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -SubTopic 10 -Section 35 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=51655945&loc=d3e3927-108312 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6676-107765 + Details
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