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FAIR VALUE MEASUREMENTS (Details) (Fair Value, Measurements, Recurring, USD $) In Millions, unless otherwise specified | Sep. 30, 2014 | Sep. 30, 2013
--- | --- | ---
ASSETS |  |
Total | $ 22.7 | $ 17.8
LIABILITIES |  |
Total | 4.5 | 5.9
Quoted Prices in Active Markets (Level 1) |  |
ASSETS |  |
Total | 19.1 | 18.9
LIABILITIES |  |
Total | 6.5 | 3.7
Significant Observable Inputs (Level 2) |  |
ASSETS |  |
Total | 7.9 | 1.7
LIABILITIES |  |
Total | 5.5 | 6.9
Significant Unobservable Inputs (Level 3) |  |
ASSETS |  |
Total | 0.2 | 0.2
LIABILITIES |  |
Total | 0 | 0
Effects of Netting and Cash Margin Receivables /Payables |  |
ASSETS |  |
Total | (4.5) | (3.0)
LIABILITIES |  |
Total | (7.5) | (4.7)
Gas Utility |  |
ASSETS |  |
U. S. Stock/Bond Mutual Funds | 19.6 | 14.5
NYMEX natural gas contracts | 0 | 0
OTCBB natural gas contracts | 0 | 0
Gasoline and heating oil contracts | 0 | 0
Total | 19.6 | 14.5
LIABILITIES |  |
NYMEX/ICE natural gas contracts | 0 | 0
OTCBB natural gas contracts | 4.0 | 5.2
NYMEX gasoline and heating oil contracts | 0 |
Total | 4.0 | 5.2
Gas Utility | Quoted Prices in Active Markets (Level 1) |  |
ASSETS |  |
U. S. Stock/Bond Mutual Funds | 15.7 | 14.5
NYMEX natural gas contracts | 2.4 | 1.5
OTCBB natural gas contracts | 0 | 0
Gasoline and heating oil contracts | 0 | 0.1
Total | 18.1 | 16.1
LIABILITIES |  |
NYMEX/ICE natural gas contracts | 5.2 | 3.5
OTCBB natural gas contracts | 0 | 0
NYMEX gasoline and heating oil contracts | 0.2 |
Total | 5.4 | 3.5
Gas Utility | Significant Observable Inputs (Level 2) |  |
ASSETS |  |
U. S. Stock/Bond Mutual Funds | 3.9 | 0
NYMEX natural gas contracts | 0 | 0
OTCBB natural gas contracts | 0.1 | 0.2
Gasoline and heating oil contracts | 0 | 0
Total | 4.0 | 0.2
LIABILITIES |  |
NYMEX/ICE natural gas contracts | 0 | 0
OTCBB natural gas contracts | 4.1 | 5.4
NYMEX gasoline and heating oil contracts | 0 |
Total | 4.1 | 5.4
Gas Utility | Significant Unobservable Inputs (Level 3) |  |
ASSETS |  |
U. S. Stock/Bond Mutual Funds | 0 | 0
NYMEX natural gas contracts | 0 | 0
OTCBB natural gas contracts | 0 | 0
Gasoline and heating oil contracts | 0 | 0
Total | 0 | 0
LIABILITIES |  |
NYMEX/ICE natural gas contracts | 0 |
OTCBB natural gas contracts | 0 | 0
NYMEX gasoline and heating oil contracts | 0 |
Total | 0 | 0
Gas Utility | Effects of Netting and Cash Margin Receivables /Payables |  |
ASSETS |  |
U. S. Stock/Bond Mutual Funds | 0 | 0
NYMEX natural gas contracts | (2.4) | (1.5)
OTCBB natural gas contracts | (0.1) | (0.2)
Gasoline and heating oil contracts | 0 | (0.1)
Total | (2.5) | (1.8)
LIABILITIES |  |
NYMEX/ICE natural gas contracts | (5.2) | (3.5)
OTCBB natural gas contracts | (0.1) | (0.2)
NYMEX gasoline and heating oil contracts | (0.2) |
Total | (5.5) | (3.7)
Gas Marketing |  |
ASSETS |  |
NYMEX natural gas contracts | 0.4 | 3.3
Natural gas commodity contracts | 2.7 |
LIABILITIES |  |
NYMEX natural gas contracts | 0 | 0.7
Natural gas commodity contracts | 0.5 |
Gas Marketing | Quoted Prices in Active Markets (Level 1) |  |
ASSETS |  |
NYMEX natural gas contracts | 1.0 | 2.8
Natural gas commodity contracts | 0 |
LIABILITIES |  |
NYMEX natural gas contracts | 1.1 | 0.2
Natural gas commodity contracts | 0 |
Gas Marketing | Significant Observable Inputs (Level 2) |  |
ASSETS |  |
NYMEX natural gas contracts | 1.2 | 1.5
Natural gas commodity contracts | 2.7 |
LIABILITIES |  |
NYMEX natural gas contracts | 0.7 | 1.5
Natural gas commodity contracts | 0.7 |
Gas Marketing | Significant Unobservable Inputs (Level 3) |  |
ASSETS |  |
NYMEX natural gas contracts | 0 | 0.2
Natural gas commodity contracts | 0.2 |
LIABILITIES |  |
NYMEX natural gas contracts | 0 | 0
Natural gas commodity contracts | 0 |
Gas Marketing | Effects of Netting and Cash Margin Receivables /Payables |  |
ASSETS |  |
NYMEX natural gas contracts | (1.8) | (1.2)
Natural gas commodity contracts | (0.2) |
LIABILITIES |  |
NYMEX natural gas contracts | (1.8) | (1.0)
Natural gas commodity contracts | (0.2) |
Laclede Gas |  |
ASSETS |  |
U. S. Stock/Bond Mutual Funds | 19.6 | 14.5
NYMEX natural gas contracts | 0 | 0
OTCBB natural gas contracts | 0 | 0
Gasoline and heating oil contracts |  | 0
Total | 19.6 | 14.5
LIABILITIES |  |
NYMEX/ICE natural gas contracts | 0 | 0
OTCBB natural gas contracts | 4.0 | 5.2
NYMEX gasoline and heating oil contracts | 0 |
Total | 4.0 | 5.2
Laclede Gas | Quoted Prices in Active Markets (Level 1) |  |
ASSETS |  |
U. S. Stock/Bond Mutual Funds | 15.7 | 14.5
NYMEX natural gas contracts | 2.4 | 1.5
OTCBB natural gas contracts | 0 | 0
Gasoline and heating oil contracts |  | 0.1
Total | 18.1 | 16.1
LIABILITIES |  |
NYMEX/ICE natural gas contracts | 5.2 | 3.5
OTCBB natural gas contracts | 0 | 0
NYMEX gasoline and heating oil contracts | 0.2 |
Total | 5.4 | 3.5
Laclede Gas | Significant Observable Inputs (Level 2) |  |
ASSETS |  |
U. S. Stock/Bond Mutual Funds | 3.9 | 0
NYMEX natural gas contracts | 0 | 0
OTCBB natural gas contracts | 0.1 | 0.2
Gasoline and heating oil contracts |  | 0
Total | 4.0 | 0.2
LIABILITIES |  |
NYMEX/ICE natural gas contracts | 0 | 0
OTCBB natural gas contracts | 4.1 | 5.4
NYMEX gasoline and heating oil contracts | 0 |
Total | 4.1 | 5.4
Laclede Gas | Significant Unobservable Inputs (Level 3) |  |
ASSETS |  |
U. S. Stock/Bond Mutual Funds | 0 | 0
NYMEX natural gas contracts | 0 | 0
OTCBB natural gas contracts | 0 | 0
Gasoline and heating oil contracts |  | 0
Total | 0 | 0
LIABILITIES |  |
NYMEX/ICE natural gas contracts | 0 | 0
OTCBB natural gas contracts | 0 | 0
NYMEX gasoline and heating oil contracts | 0 |
Total | 0 | 0
Laclede Gas | Effects of Netting and Cash Margin Receivables /Payables |  |
ASSETS |  |
U. S. Stock/Bond Mutual Funds | 0 | 0
NYMEX natural gas contracts | (2.4) | (1.5)
OTCBB natural gas contracts | (0.1) | (0.2)
Gasoline and heating oil contracts |  | (0.1)
Total | (2.5) | (1.8)
LIABILITIES |  |
NYMEX/ICE natural gas contracts | (5.2) | (3.5)
OTCBB natural gas contracts | (0.1) | (0.2)
NYMEX gasoline and heating oil contracts | (0.2) |
Total | $ (5.5) | $ (3.7)

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