CONDENSED CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Operating Revenues	$ 327.8	$ 321.1	$ 1,945.3	$ 1,603.5
Operating Expenses:
Natural gas	96.9	72.9	897.2	631.9
Operation and maintenance	112.0	124.9	342.6	347.2
Depreciation and amortization	53.1	50.1	155.4	146.8
Taxes, other than income taxes	32.6	31.1	126.6	122.7
Impairments	0.0	148.6	0.0	148.6
Total Operating Expenses	294.6	427.6	1,521.8	1,397.2
Operating Income (Loss)	33.2	(106.5)	423.5	206.3
Interest Expense, Net	26.9	26.4	78.4	80.3
Other (Expense) Income, Net	(1.0)	13.0	5.1	(0.8)
Income (Loss) Before Income Taxes	5.3	(119.9)	350.2	125.2
Income Tax (Benefit) Expense		(27.6)	68.6	16.9
Net Income (Loss)	5.3	(92.3)	281.6	108.3
Provision for preferred dividends	3.7	3.7	11.1	11.1
Income (loss) allocated to participating securities	0.1	(0.1)	0.5	0.2
Net Income (Loss) Available to Common Shareholders	$ 1.5	$ (95.9)	$ 270.0	$ 97.0
Weighted Average Number of Common Shares Outstanding:
Basic	51.6	51.2	51.6	51.1
Diluted	51.7	51.2	51.7	51.2
Basic Earnings (Loss) Per Common Share	$ 0.03	$ (1.87)	$ 5.24	$ 1.90
Diluted Earnings (Loss) Per Common Share	$ 0.03	$ (1.87)	$ 5.23	$ 1.90
Spire Alabama
Operating Revenues	$ 93.3	$ 81.2	$ 429.5	$ 392.9
Operating Expenses:
Natural gas	24.1	17.3	129.0	103.7
Operation and maintenance	31.9	32.5	98.4	104.8
Depreciation and amortization	16.1	15.0	46.3	43.9
Taxes, other than income taxes	7.9	7.1	30.8	29.1
Total Operating Expenses	80.0	71.9	304.5	281.5
Operating Income (Loss)	13.3	9.3	125.0	111.4
Interest Expense, Net	5.2	5.1	15.2	15.8
Other (Expense) Income, Net	0.6	0.8	2.0	4.2
Income (Loss) Before Income Taxes	8.7	5.0	111.8	99.8
Income Tax (Benefit) Expense	2.2	1.4	28.3	25.2
Net Income (Loss)	$ 6.5	$ 3.6	$ 83.5	$ 74.6