CONDENSED CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Operating Revenues	$ 1,104.9	$ 715.5	$ 1,617.5	$ 1,282.4
Operating Expenses:
Natural gas	619.1	297.1	800.3	559.0
Operation and maintenance	119.0	105.7	230.6	222.3
Depreciation and amortization	51.5	49.2	102.3	96.7
Taxes, other than income taxes	57.9	53.0	94.0	91.6
Total Operating Expenses	847.5	505.0	1,227.2	969.6
Operating Income	257.4	210.5	390.3	312.8
Interest Expense, Net	25.8	27.2	51.5	53.9
Other Income (Expense), Net	1.8	(19.5)	6.1	(13.8)
Income Before Income Taxes	233.4	163.8	344.9	245.1
Income Tax Expense	46.0	30.2	68.6	44.5
Net Income	187.4	133.6	276.3	200.6
Provision for preferred dividends	3.7	3.7	7.4	7.4
Income allocated to participating securities	0.3	0.2	0.4	0.3
Net Income Available to Common Shareholders	$ 183.4	$ 129.7	$ 268.5	$ 192.9
Weighted Average Number of Common Shares Outstanding:
Basic	51.6	51.0	51.6	51.0
Diluted	51.7	51.1	51.7	51.1
Basic Earnings Per Common Share	$ 3.56	$ 2.55	$ 5.21	$ 3.78
Diluted Earnings Per Common Share	$ 3.55	$ 2.54	$ 5.20	$ 3.77
Spire Alabama
Operating Revenues	$ 222.6	$ 185.5	$ 336.2	$ 311.7
Operating Expenses:
Natural gas	69.8	39.4	104.9	86.4
Operation and maintenance	33.7	37.1	66.5	72.3
Depreciation and amortization	15.2	14.6	30.2	28.9
Taxes, other than income taxes	14.7	13.2	22.9	22.0
Total Operating Expenses	133.4	104.3	224.5	209.6
Operating Income	89.2	81.2	111.7	102.1
Interest Expense, Net	5.3	5.3	10.0	10.7
Other Income (Expense), Net	0.7	1.2	1.4	3.4
Income Before Income Taxes	84.6	77.1	103.1	94.8
Income Tax Expense	21.3	19.3	26.1	23.8
Net Income	$ 63.3	$ 57.8	$ 77.0	$ 71.0