CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Net Income	$ 154.6	$ 98.2	$ 221.9	$ 214.2
Cash flow hedging derivative instruments:
Net hedging (loss) gain arising during the period	(7.7)	1.8	(18.1)	1.9
Reclassification adjustment for gains included in net income	(0.4)	(0.4)	(0.7)	(0.8)
Net unrealized (loss) gain on cash flow hedging derivative instruments	(8.1)	1.4	(18.8)	1.1
Net gain on defined benefit pension and other postretirement plans	0.1		0.1	0.1
Net unrealized gain (loss) on available for sale securities	0.1		0.1	(0.1)
Other Comprehensive (Loss) Income, Before Tax	(7.9)	1.4	(18.6)	1.1
Income Tax (Benefit) Expense Related to Items of Other Comprehensive (Loss) Income	(1.9)	0.3	(4.4)	0.2
Other Comprehensive (Loss) Income, Net of Tax	(6.0)	1.1	(14.2)	0.9
Comprehensive Income	148.6	99.3	207.7	215.1
Operating Revenues:
Gas Utility	776.7	790.6	1,350.5	1,332.5
Total Operating Revenues	803.5	813.4	1,405.5	1,375.2
Gas Utility
Natural and propane gas	337.4	383.7	589.1	624.5
Other operation and maintenance expenses	109.5	135.3	212.0	234.3
Depreciation and amortization	44.4	41.1	88.1	81.4
Taxes, other than income taxes	57.4	58.0	96.6	94.7
Total Operating Expenses	594.0	663.3	1,090.9	1,121.1
Operating Income	209.5	150.1	314.6	254.1
Other Income (Expense), Net	6.1	(7.6)	8.9	(4.3)
Interest Charges:
Interest on long-term debt	21.5	21.0	41.9	41.7
Other interest charges	6.1	4.4	11.6	8.1
Total Interest Charges	27.6	25.4	53.5	49.8
Income Before Income Taxes	188.0	117.1	270.0	200.0
Income Tax Expense (Benefit)	33.4	18.9	48.1	(14.2)
Net Income (Loss)	154.6	98.2	221.9	214.2
Spire Missouri
Net Income	80.0	38.4	131.2	127.8
Cash flow hedging derivative instruments:
Other Comprehensive (Loss) Income, Net of Tax		(0.1)		(0.1)
Comprehensive Income	80.0	38.3	131.2	127.7
Operating Revenues:
Gas Utility	556.6	533.2	969.8	925.5
Total Operating Revenues	556.6	533.2	969.8	925.5
Gas Utility
Natural and propane gas	313.8	311.2	537.2	517.4
Other operation and maintenance expenses	70.7	94.0	133.8	154.1
Depreciation and amortization	27.8	25.2	55.0	50.0
Taxes, other than income taxes	41.9	41.2	70.0	67.4
Total Operating Expenses	454.2	471.6	796.0	788.9
Operating Income	102.4	61.6	173.8	136.6
Other Income (Expense), Net	2.5	(9.9)	1.8	(8.9)
Interest Charges:
Interest on long-term debt	10.0	9.8	19.4	19.7
Other interest charges	3.2	2.1	5.9	3.8
Total Interest Charges	13.2	11.9	25.3	23.5
Income Before Income Taxes	91.7	39.8	150.3	104.2
Income Tax Expense (Benefit)	11.7	1.4	19.1	(23.6)
Net Income (Loss)	$ 80.0	$ 38.4	$ 131.2	$ 127.8