LONG-TERM DEBT (Tables)

12 Months Ended

Sep. 30, 2017

Debt Disclosure [Abstract]

Schedule of maturities of long-term debt by fiscal year

Maturities of long-term debt for Spire on a consolidated basis, Spire Missouri and Spire Alabama for the five fiscal years subsequent to September 30, 2017 are as follows:

	Spire		Spire Missouri		Spire Alabama
2018	$	100.0	$	100.0	$	—
2019	180.0		50.0		—
2020	40.0		—		40.0
2021	55.0		—		—
2022	50.0		—		50.0