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FAIR VALUE MEASUREMENTS (Tables) | 12 Months Ended
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Sep. 30, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Fair Value Measurements, Measured on Recurring Basis | The following table categorizes the assets and liabilities in the Consolidated Balance Sheets that are accounted for at fair value on a recurring basis in periods subsequent to initial recognition.
($ Millions) | Quoted Prices in Active Markets (Level 1) |  | Significant Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3) |  | Effects of Netting and Cash Margin Receivables /Payables |  | Total
As of September 30, 2014 |  |  |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |  |  |
Gas Utility |  |  |  |  |  |  |  |  |
U. S. Stock/Bond Mutual Funds | $ | 15.7 |  |  | $ | 3.9 |  |  | $ | — |  |  | $ | — |  |  | $ | 19.6 |
NYMEX natural gas contracts | 2.4 |  |  | — |  |  | — |  |  | (2.4 | ) |  | — |
OTCBB natural gas contracts | — |  |  | 0.1 |  |  | — |  |  | (0.1 | ) |  | — |
Gasoline and heating oil contracts | — |  |  | — |  |  | — |  |  | — |  |  | — |
Subtotal | 18.1 |  |  | 4.0 |  |  | — |  |  | (2.5 | ) |  | 19.6 |
Gas Marketing |  |  |  |  |  |  |  |  |
NYMEX natural gas contracts | 1.0 |  |  | 1.2 |  |  | — |  |  | (1.8 | ) |  | 0.4 |
Natural gas commodity contracts | — |  |  | 2.7 |  |  | 0.2 |  |  | (0.2 | ) |  | 2.7 |
Total | $ | 19.1 |  |  | $ | 7.9 |  |  | $ | 0.2 |  |  | $ | (4.5 | ) |  | $ | 22.7 |
LIABILITIES |  |  |  |  |  |  |  |  |
Gas Utility |  |  |  |  |  |  |  |  |
NYMEX/ICE natural gas contracts | $ | 5.2 |  |  | $ | — |  |  | $ | — |  |  | $ | (5.2 | ) |  | $ | — |
OTCBB natural gas contracts | — |  |  | 4.1 |  |  | — |  |  | (0.1 | ) |  | 4.0 |
NYMEX gasoline and heating oil contracts | 0.2 |  |  | — |  |  | — |  |  | (0.2 | ) |  | — |
Subtotal | 5.4 |  |  | 4.1 |  |  | — |  |  | (5.5 | ) |  | 4.0 |
Gas Marketing |  |  |  |  |  |  |  |  |
NYMEX natural gas contracts | 1.1 |  |  | 0.7 |  |  | — |  |  | (1.8 | ) |  | — |
Natural gas commodity contracts | — |  |  | 0.7 |  |  | — |  |  | (0.2 | ) |  | 0.5 |
Total | $ | 6.5 |  |  | $ | 5.5 |  |  | $ | — |  |  | $ | (7.5 | ) |  | $ | 4.5 |
As of September 30, 2013 |  |  |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |  |  |
Gas Utility |  |  |  |  |  |  |  |  |
U. S. Stock/Bond Mutual Funds | $ | 14.5 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 14.5 |
NYMEX natural gas contracts | 1.5 |  |  | — |  |  | — |  |  | (1.5 | ) |  | — |
OTCBB natural gas contracts | — |  |  | 0.2 |  |  | — |  |  | (0.2 | ) |  | — |
Gasoline and heating oil contracts | 0.1 |  |  | — |  |  | — |  |  | (0.1 | ) |  | — |
Subtotal | 16.1 |  |  | 0.2 |  |  | — |  |  | (1.8 | ) |  | 14.5 |
Gas Marketing |  |  |  |  |  |  |  |  |
Natural gas contracts | 2.8 |  |  | 1.5 |  |  | 0.2 |  |  | (1.2 | ) |  | 3.3 |
Total | $ | 18.9 |  |  | $ | 1.7 |  |  | $ | 0.2 |  |  | $ | (3.0 | ) |  | $ | 17.8 |
LIABILITIES |  |  |  |  |  |  |  |  |
Gas Utility |  |  |  |  |  |  |  |  |
NYMEX/ICE natural gas contracts | $ | 3.5 |  |  | $ | — |  |  |  |  | $ | (3.5 | ) |  | $ | — |
OTCBB natural gas contracts | — |  |  | 5.4 |  |  | — |  |  | (0.2 | ) |  | 5.2 |
Subtotal | 3.5 |  |  | 5.4 |  |  | — |  |  | (3.7 | ) |  | 5.2 |
Gas Marketing |  |  |  |  |  |  |  |  |
Natural gas contracts | 0.2 |  |  | 1.5 |  |  | — |  |  | (1.0 | ) |  | 0.7 |
Total | $ | 3.7 |  |  | $ | 6.9 |  |  | $ | — |  |  | $ | (4.7 | ) |  | $ | 5.9 |
Laclede Gas |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Fair Value Measurements, Measured on Recurring Basis | The following table categorizes the assets and liabilities in the Balance Sheets that are accounted for at fair value on a recurring basis in periods subsequent to initial recognition.
($ Millions) | Quoted Prices in Active Markets (Level 1) |  | Significant Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3) |  | Effects of Netting and Cash Margin Receivables /Payables |  | Total
As of September 30, 2014 |  |  |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |  |  |
U. S. Stock/Bond Mutual Funds | $ | 15.7 |  |  | $ | 3.9 |  |  | $ | — |  |  | $ | — |  |  | $ | 19.6 |
NYMEX natural gas contracts | 2.4 |  |  | — |  |  | — |  |  | (2.4 | ) |  | — |
OTCBB natural gas contracts | — |  |  | 0.1 |  |  | — |  |  | (0.1 | ) |  | — |
Total | $ | 18.1 |  |  | $ | 4.0 |  |  | $ | — |  |  | $ | (2.5 | ) |  | $ | 19.6 |
LIABILITIES |  |  |  |  |  |  |  |  |
NYMEX natural gas contracts | 5.2 |  |  | — |  |  | — |  |  | (5.2 | ) |  | $ | — |
OTCBB natural gas contracts | — |  |  | 4.1 |  |  | — |  |  | (0.1 | ) |  | 4.0 |
Gasoline and heating oil contracts | $ | 0.2 |  |  | $ | — |  |  | $ | — |  |  | $ | (0.2 | ) |  | $ | — |
Total | $ | 5.4 |  |  | $ | 4.1 |  |  | $ | — |  |  | $ | (5.5 | ) |  | $ | 4.0 |
As of September 30, 2013 |  |  |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |  |  |
U. S. Stock/Bond Mutual Funds | $ | 14.5 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 14.5 |
NYMEX natural gas contracts | 1.5 |  |  | — |  |  | — |  |  | (1.5 | ) |  | — |
OTCBB natural gas contracts | — |  |  | 0.2 |  |  | — |  |  | (0.2 | ) |  | — |
Gasoline and heating oil contracts | 0.1 |  |  | — |  |  | — |  |  | (0.1 | ) |  | — |
Total | $ | 16.1 |  |  | $ | 0.2 |  |  | $ | — |  |  | $ | (1.8 | ) |  | $ | 14.5 |
LIABILITIES |  |  |  |  |  |  |  |  |
NYMEX Natural gas contracts | 3.5 |  |  | — |  |  | — |  |  | (3.5 | ) |  | — |
OTCBB natural gas contracts | — |  |  | 5.4 |  |  | — |  |  | (0.2 | ) |  | 5.2 |
Total | $ | 3.5 |  |  | $ | 5.4 |  |  | $ | — |  |  | $ | (3.7 | ) |  | $ | 5.2 |

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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19190-110258 + Details
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