INTERIM FINANCIAL INFORMATION (UNAUDITED) (Tables)

12 Months Ended

Sep. 30, 2017

Quarterly Financial Information [Line Items]

Schedule of Quarterly Financial Information

Three Months Ended	Dec. 31		March 31		June 30		Sept. 30
Fiscal Year 2017
Total Operating Revenues	$	495.1	$	663.4	$	323.5	$	258.7
Operating Income	89.1		180.4		50.3		1.9
Net Income (Loss)	45.2		108.0		21.7		(13.3		)
Basic Earnings (Loss) Per Share of Common Stock	$	0.99	$	2.36	$	0.45	$	(0.28	)
Diluted Earnings (Loss) Per Share of Common Stock	$	0.99	$	2.36	$	0.45	$	(0.28	)
Fiscal Year 2016
Total Operating Revenues	$	399.4	$	609.3	$	249.3	$	279.3
Operating Income (Loss)	87.0		167.7		35.3		(7.7		)
Net Income (Loss)	46.9		100.8		10.7		(14.2		)
Basic Earnings (Loss) Per Share of Common Stock	$	1.08	$	2.32	$	0.24	$	(0.31	)
Diluted Earnings (Loss) Per Share of Common Stock	$	1.08	$	2.31	$	0.24	$	(0.31	)

Spire Missouri

Quarterly Financial Information [Line Items]

Schedule of Quarterly Financial Information

Three Months Ended	Dec. 31		March 31		June 30		Sept. 30
Fiscal Year 2017
Total Operating Revenues	$	363.6	$	447.2	$	198.5	$	162.6
Operating Income	64.5		90.2		30.5		11.7
Net Income	38.0		57.0		15.5		2.5
Fiscal Year 2016
Total Operating Revenues	$	317.2	$	446.7	$	179.3	$	144.3
Operating Income	65.1		87.0		29.4		5.4
Net Income (Loss)	39.4		54.3		13.9		(1.7		)

Spire Alabama

Quarterly Financial Information [Line Items]

Schedule of Quarterly Financial Information

Three Months Ended	Dec. 31		March 31		June 30		Sept. 30
Fiscal Year 2017
Total Operating Revenues	$	86.7	$	158.8	$	90.5	$	64.5
Operating Income (Loss)	19.8		78.9		15.5		(8.4		)
Net Income (Loss)	10.3		47.6		7.4		(7.2		)
Fiscal Year 2016
Total Operating Revenues	$	82.3	$	166.0	$	74.0	$	46.2
Operating Income (Loss)	18.9		80.4		9.3		(17.1		)
Net Income (Loss)	9.9		48.1		4.0		(8.8		)