CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Operating Revenues:
Gas Utility	$ 1,859.2	$ 1,888.0	$ 1,660.0
Gas Marketing and other	93.2	77.0	80.7
Total Operating Revenues	1,952.4	1,965.0	1,740.7
Gas Utility
Natural and propane gas	698.2	770.1	570.5
Other operation and maintenance expenses	432.3	441.2	385.8
Depreciation and amortization	179.4	167.0	153.5
Taxes, other than income taxes	151.7	152.5	137.8
Total Gas Utility Operating Expenses	1,461.6	1,530.8	1,247.6
Gas Marketing and other	188.5	140.1	152.2
Total Operating Expenses	1,650.1	1,670.9	1,399.8
Operating Income	302.3	294.1	340.9
Interest Expense, Net	104.4	98.4	89.1
Other Income (Expense), Net	21.2	(8.0)	(12.6)
Income Before Income Taxes	219.1	187.7	239.2
Income Tax Expense (Benefit)	34.5	(26.5)	77.6
Net Income	184.6	214.2	161.6
Provision for preferred dividends	5.3
Income allocated to participating securities	0.4	0.5	0.4
Net Income Available to Common Shareholders	$ 178.9	$ 213.7	$ 161.2
Weighted Average Number of Common Shares Outstanding:
Basic	50.7	49.1	46.9
Diluted	50.8	49.3	47.0
Basic Earnings Per Share of Common Stock	$ 3.53	$ 4.35	$ 3.44
Diluted Earnings Per Share of Common Stock	$ 3.52	$ 4.33	$ 3.43
Spire Alabama
Operating Revenues:
Gas Utility	$ 465.5	$ 500.7	$ 400.5
Total Operating Revenues	465.5	500.7	400.5
Gas Utility
Natural and propane gas	135.5	176.0	84.5
Other operation and maintenance expenses	142.6	138.8	128.2
Depreciation and amortization	56.2	53.2	49.9
Taxes, other than income taxes	35.7	36.1	29.9
Total Operating Expenses	370.0	404.1	292.5
Operating Income	95.5	96.6	108.0
Interest Expense, Net	21.7	17.3	14.4
Other Income (Expense), Net	7.0	3.6	0.3
Income Before Income Taxes	80.8	82.9	93.9
Income Tax Expense (Benefit)	20.5	81.6	35.8
Net Income	$ 60.3	$ 1.3	$ 58.1