CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Operating Revenues	$ 1,855.4	$ 1,952.4	$ 1,965.0
Operating Expenses:
Natural gas	696.1	840.3	871.7
Operation and maintenance	458.6	474.1	477.3
Depreciation and amortization	197.3	181.7	168.4
Taxes, other than income taxes	148.4	154.0	153.5
Impairments	148.6	0.0	0.0
Total Operating Expenses	1,649.0	1,650.1	1,670.9
Operating Income	206.4	302.3	294.1
Interest Expense, Net	105.5	104.4	98.4
Other Income (Expense), Net	0.1	21.2	(8.0)
Income Before Income Taxes	101.0	219.1	187.7
Income Tax Expense (Benefit)	12.4	34.5	(26.5)
Net Income	88.6	184.6	214.2
Provision for preferred dividends	14.8	5.3
Income allocated to participating securities	0.1	0.4	0.5
Net Income Available to Common Shareholders	$ 73.7	$ 178.9	$ 213.7
Weighted Average Number of Common Shares Outstanding:
Basic	51.2	50.7	49.1
Diluted	51.3	50.8	49.3
Basic Earnings Per Share of Common Stock	$ 1.44	$ 3.53	$ 4.35
Diluted Earnings Per Share of Common Stock	$ 1.44	$ 3.52	$ 4.33
Spire Alabama
Operating Revenues	$ 455.0	$ 465.5	$ 500.7
Operating Expenses:
Natural gas	118.9	135.5	176.0
Operation and maintenance	139.1	142.6	138.8
Depreciation and amortization	59.3	56.2	53.2
Taxes, other than income taxes	34.8	35.7	36.1
Total Operating Expenses	352.1	370.0	404.1
Operating Income	102.9	95.5	96.6
Interest Expense, Net	20.6	21.7	17.3
Other Income (Expense), Net	5.4	7.0	3.6
Income Before Income Taxes	87.7	80.8	82.9
Income Tax Expense (Benefit)	22.0	20.5	81.6
Net Income	$ 65.7	$ 60.3	$ 1.3