CONDENSED CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Operating Revenues	$ 555.4	$ 512.6
Operating Expenses:
Natural gas	249.2	181.2
Operation and maintenance	116.4	111.6
Depreciation and amortization	56.9	50.8
Taxes, other than income taxes	37.6	36.1
Total Operating Expenses	460.1	379.7
Operating Income	95.3	132.9
Interest Expense, Net	28.6	25.7
Other Income, Net	7.4	4.3
Income Before Income Taxes	74.1	111.5
Income Tax Expense	18.4	22.6
Net Income	55.7	88.9
Provision for preferred dividends	3.7	3.7
Income allocated to participating securities	0.1	0.1
Net Income Available to Common Shareholders	$ 51.9	$ 85.1
Weighted Average Number of Common Shares Outstanding:
Basic	51.6	51.5
Diluted	51.7	51.6
Basic Earnings Per Common Share	$ 1.01	$ 1.65
Diluted Earnings Per Common Share	$ 1.01	$ 1.65
Spire Alabama
Operating Revenues	$ 126.6	$ 113.6
Operating Expenses:
Natural gas	45.5	35.1
Operation and maintenance	34.5	32.8
Depreciation and amortization	16.5	15.0
Taxes, other than income taxes	9.0	8.2
Total Operating Expenses	105.5	91.1
Operating Income	21.1	22.5
Interest Expense, Net	5.1	4.7
Other Income, Net	0.4	0.7
Income Before Income Taxes	16.4	18.5
Income Tax Expense	4.2	4.8
Net Income	$ 12.2	$ 13.7