FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables)

6 Months Ended

Mar. 31, 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 March 31, 2016
Cash and cash equivalents	$	8.7	$	8.7	$	8.7	$	—	$	—
Short-term debt	253.6		253.6		—		253.6		—
Long-term debt	1,851.6		1,960.4		—		1,960.4		—
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 March 31, 2015
Cash and cash equivalents	$	46.9	$	46.9	$	46.9	$	—	$	—
Short-term debt	247.6		247.6		—		247.6		—
Long-term debt, including current portion	1,816.3		1,971.0		—		1,971.0		—

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 March 31, 2016
Cash and cash equivalents	$	3.8	$	3.8	$	3.8	$	—	$	—
Short-term debt	169.6		169.6		—		169.6		—
Long-term debt	808.2		885.9		—		885.9		—
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 March 31, 2015
Cash and cash equivalents	$	9.3	$	9.3	$	9.3	$	—	$	—
Short-term debt	153.0		153.0		—		153.0		—
Long-term debt	808.0		909.5		—		909.5		—

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 March 31, 2016
Cash and cash equivalents	$	2.3	$	2.3	$	2.3	$	—	$	—
Short-term debt	41.0		41.0		—		41.0		—
Long-term debt	250.0		262.7		—		262.7		—
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 March 31, 2015
Cash and cash equivalents	$	35.4	$	35.4	$	35.4	$	—	$	—
Short-term debt	25.0		25.0		—		25.0		—
Long-term debt, including current portion	215.0		235.1		—		235.1		—