FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables)

9 Months Ended

Jun. 30, 2016

Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]

Fair value of financial instruments

The carrying amounts and estimated fair values of financial instruments not measured at fair value on a recurring basis for the Company are as follows:

					Classification of Estimated Fair Value
	Carrying Amount		Fair Value		Quoted Prices in Active Markets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
As of June 30, 2016
Cash and cash equivalents	$	4.9	$	4.9	$	4.9	$	—	$	—
Short-term debt	97.6		97.6		—		97.6		—
Long-term debt	1,851.7		2,014.3		—		2,014.3		—
As of September 30, 2015
Cash and cash equivalents	$	13.8	$	13.8	$	13.8	$	—	$	—
Short-term debt	338.0		338.0		—		338.0		—
Long-term debt, including current portion	1,851.5		1,944.2		—		1,944.2		—
As of June 30, 2015
Cash and cash equivalents	$	5.7	$	5.7	$	5.7	$	—	$	—
Short-term debt	211.4		211.4		—		211.4		—
Long-term debt, including current portion	1,816.4		1,888.4		—		1,888.4		—

Laclede Gas

Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]

Fair value of financial instruments

The carrying amounts and estimated fair values of financial instruments not measured at fair value on a recurring basis for Laclede Gas are as follows:

					Classification of Estimated Fair Value
	Carrying Amount		Fair Value		Quoted Prices in Active Markets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
As of June 30, 2016
Cash and cash equivalents	$	1.5	$	1.5	$	1.5	$	—	$	—
Short-term debt	136.4		136.4		—		136.4		—
Long-term debt	808.3		901.8		—		901.8		—
As of September 30, 2015
Cash and cash equivalents	$	1.7	$	1.7	$	1.7	$	—	$	—
Short-term debt	233.0		233.0		—		233.0		—
Long-term debt	808.1		880.2		—		880.2		—
As of June 30, 2015
Cash and cash equivalents	$	3.0	$	3.0	$	3.0	$	—	$	—
Short-term debt	135.2		135.2		—		135.2		—
Long-term debt	808.1		868.5		—		868.5		—

Alagasco

Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]

Fair value of financial instruments

The carrying amounts and estimated fair values of financial instruments not measured at fair value on a recurring basis for Alagasco are as follows:

					Classification of Estimated Fair Value
	Carrying Amount		Fair Value		Quoted Prices in Active Markets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
As of June 30, 2016
Cash and cash equivalents	$	—	$	—	$	—	$	—	$	—
Short-term debt	37.8		37.8		—		37.8		—
Long-term debt	250.0		272.5		—		272.5		—
As of September 30, 2015
Cash and cash equivalents	$	7.2	$	7.2	$	7.2	$	—	$	—
Short-term debt	31.0		31.0		—		31.0		—
Long-term debt, including current portion	250.0		263.2		—		263.2		—
As of June 30, 2015
Cash and cash equivalents	$	0.2	$	0.2	$	0.2	$	—	$	—
Short-term debt	8.5		8.5		—		8.5		—
Long-term debt, including current portion	215.0		226.7		—		226.7		—