CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Net Income	$ 67.3	$ 116.0
Cash flow hedging derivative instruments:
Net hedging (loss) gain arising during the period	(10.4)	0.1
Reclassification adjustment for income included in net income	(0.3)	(0.4)
Net unrealized loss on cash flow hedging derivative instruments	(10.7)	(0.3)
Net gain on defined benefit pension and other postretirement plans		0.1
Net unrealized loss on available for sale securities		(0.1)
Other Comprehensive Loss, Before Tax	(10.7)	(0.3)
Income Tax Benefit Related to Items of Other Comprehensive Loss	(2.5)	(0.1)
Other Comprehensive Loss, Net of Tax	(8.2)	(0.2)
Comprehensive Income	59.1	115.8
Operating Revenues:
Gas Utility	573.8	541.9
Total Operating Revenues	602.0	561.8
Gas Utility
Natural and propane gas	251.7	240.8
Other operation and maintenance expenses	102.5	99.0
Depreciation and amortization	43.7	40.3
Taxes, other than income taxes	39.2	36.7
Total Operating Expenses	496.9	457.8
Operating Income	105.1	104.0
Other (Expense) Income, Net	2.8	3.3
Interest Charges:
Interest on long-term debt	20.4	20.7
Other interest charges	5.5	3.7
Total Interest Charges	25.9	24.4
Income Before Income Taxes	82.0	82.9
Income Tax Expense (Benefit)	14.7	(33.1)
Net Income (Loss)	67.3	116.0
Spire Missouri
Net Income	51.2	89.4
Operating Revenues:
Gas Utility	413.2	392.3
Total Operating Revenues	413.2	392.3
Gas Utility
Natural and propane gas	223.4	206.2
Other operation and maintenance expenses	63.1	60.1
Depreciation and amortization	27.2	24.8
Taxes, other than income taxes	28.1	26.2
Total Operating Expenses	341.8	317.3
Operating Income	71.4	75.0
Other (Expense) Income, Net	(0.7)	1.0
Interest Charges:
Interest on long-term debt	9.4	9.9
Other interest charges	2.7	1.7
Total Interest Charges	12.1	11.6
Income Before Income Taxes	58.6	64.4
Income Tax Expense (Benefit)	7.4	(25.0)
Net Income (Loss)	$ 51.2	$ 89.4