CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Net (Loss) Income	$ (3.0)	$ 25.9	$ 218.9	$ 240.1
Cash flow hedging derivative instruments:
Net hedging (loss) gain arising during the period	(12.3)	0.6	(30.4)	2.5
Reclassification adjustment for gains included in net income	(0.3)	(0.3)	(1.0)	(1.1)
Net unrealized (loss) gain on cash flow hedging derivative instruments	(12.6)	0.3	(31.4)	1.4
Net gain on defined benefit pension and other postretirement plans	0.1		0.2	0.1
Net unrealized gain (loss) on available for sale securities			0.1	(0.1)
Other Comprehensive (Loss) Income, Before Tax	(12.5)	0.3	(31.1)	1.4
Income Tax (Benefit) Expense Related to Items of Other Comprehensive (Loss) Income	(3.1)		(7.5)	0.2
Other Comprehensive (Loss) Income, Net of Tax	(9.4)	0.3	(23.6)	1.2
Comprehensive (Loss) Income	(12.4)	26.2	195.3	241.3
Operating Revenues:
Gas Utility	301.4	334.8	1,651.9	1,667.3
Total Operating Revenues	321.3	350.6	1,726.8	1,725.8
Gas Utility
Natural and propane gas	75.5	107.2	664.6	731.7
Other operation and maintenance expenses	111.2	99.1	323.2	333.4
Depreciation and amortization	45.1	40.5	133.2	121.9
Taxes, other than income taxes	29.7	33.5	126.3	128.2
Total Operating Expenses	308.0	291.7	1,398.9	1,412.8
Operating Income	13.3	58.9	327.9	313.0
Other Income (Expense), Net	6.4	(3.1)	15.3	(7.4)
Interest Charges:
Interest on long-term debt	20.5	20.8	62.4	62.5
Other interest charges	5.1	3.4	16.7	11.5
Total Interest Charges	25.6	24.2	79.1	74.0
(Loss) Income Before Income Taxes	(5.9)	31.6	264.1	231.6
Income Tax (Benefit) Expense	(2.9)	5.7	45.2	(8.5)
Net (Loss) Income	(3.0)	25.9	218.9	240.1
Spire Missouri
Net (Loss) Income	1.1	11.5	132.3	139.3
Cash flow hedging derivative instruments:
Other Comprehensive (Loss) Income, Net of Tax	0.1	0.1	0.1
Comprehensive (Loss) Income	1.2	11.6	132.4	139.3
Operating Revenues:
Gas Utility	191.4	215.5	1,161.2	1,141.0
Total Operating Revenues	191.4	215.5	1,161.2	1,141.0
Gas Utility
Natural and propane gas	63.1	81.1	600.3	598.5
Other operation and maintenance expenses	68.2	59.8	202.0	213.9
Depreciation and amortization	28.0	24.2	83.0	74.2
Taxes, other than income taxes	19.9	23.7	89.9	91.1
Total Operating Expenses	179.2	188.8	975.2	977.7
Operating Income	12.2	26.7	186.0	163.3
Other Income (Expense), Net	0.5	(3.7)	2.3	(12.6)
Interest Charges:
Interest on long-term debt	9.3	9.6	28.7	29.3
Other interest charges	2.6	1.7	8.5	5.5
Total Interest Charges	11.9	11.3	37.2	34.8
(Loss) Income Before Income Taxes	0.8	11.7	151.1	115.9
Income Tax (Benefit) Expense	(0.3)	0.2	18.8	(23.4)
Net (Loss) Income	$ 1.1	$ 11.5	$ 132.3	$ 139.3