CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Millions	Mar. 31, 2022	Sep. 30, 2021	Mar. 31, 2021
ASSETS
Utility Plant	$ 7,443.7	$ 7,225.0	$ 6,974.3
Less: Accumulated depreciation and amortization	2,241.9	2,169.3	2,145.1
Net Utility Plant	5,201.8	5,055.7	4,829.2
Non-utility Property (net of accumulated depreciation and amortization of $41.3, $32.1 and $25.4 at March 31, 2022, September 30, 2021, and March 31, 2021, respectively)	475.8	471.1	457.0
Other Investments	89.0	83.1	76.4
Total Other Property and Investments	564.8	554.2	533.4
Current Assets:
Cash and cash equivalents	8.3	4.3	104.0
Accounts receivable:
Utility	389.2	338.4	447.7
Other	245.4	288.2	182.3
Allowance for credit losses	(35.1)	(30.3)	(34.4)
Delayed customer billings	54.7	9.2	20.7
Inventories:
Natural gas	125.0	267.7	143.0
Propane gas	8.6	8.7	8.7
Materials and supplies	34.7	28.6	28.3
Regulatory assets	164.0	306.5	60.4
Prepayments	26.6	29.0	29.4
Other	67.9	66.2	49.9
Regulatory assets	164.0	306.5	60.4
Prepayments	26.6	29.0	29.4
Other	67.9	66.2	49.9
Total Current Assets	1,089.3	1,316.5	1,040.0
Deferred Charges and Other Assets:
Goodwill	1,171.6	1,171.6	1,171.6
Regulatory assets	1,106.8	993.5	1,133.6
Other	267.0	264.9	229.0
Total Deferred Charges and Other Assets	2,545.4	2,430.0	2,534.2
Total Assets	9,401.3	9,356.4	8,936.8
Capitalization:
Preferred stock ($25.00 par value per share; 10.0 million depositary shares authorized, issued and outstanding at March 31, 2022, September 30, 2021, and March 31, 2021)	242.0	242.0	242.0
Common stock (par value $1.00 per share; 70.0 million shares authorized; 52.1 million shares issued and outstanding at March 31, 2022, 51.7 million shares issued and outstanding at September 30, 2021 and March 31, 2021, respectively)	52.1	51.7	51.7
Paid-in capital and common stock	1,541.1	1,517.9	1,512.2
Retained earnings	992.3	843.0	920.1
Accumulated other comprehensive income	13.7	3.6	5.3
Total Shareholders' Equity	2,841.2	2,658.2	2,731.3
Temporary equity	11.8	9.8	8.2
Long-term debt (less current portion)	3,207.3	2,939.1	2,692.5
Total Capitalization	6,060.3	5,607.1	5,432.0
Current Liabilities:
Current portion of long-term debt	31.2	55.8	110.8
Notes payable	607.1	672.0	653.5
Accounts payable	367.5	409.9	352.1
Advance customer billings	6.3	32.1	11.4
Wages and compensation accrued	39.3	59.5	43.5
Customer deposits	29.4	28.9	29.9
Taxes accrued	67.4	78.8	60.0
Regulatory liabilities	3.2	34.6	56.3
Other	244.4	236.7	190.0
Total Current Liabilities	1,395.8	1,608.3	1,507.5
Deferred Credits and Other Liabilities:
Deferred income taxes	666.5	612.3	602.8
Pension and postretirement benefit costs	199.2	235.9	274.4
Asset retirement obligations	530.1	519.6	551.0
Regulatory liabilities	400.4	620.9	423.5
Other	149.0	152.3	145.6
Total Deferred Credits and Other Liabilities	1,945.2	2,141.0	1,997.3
Commitments and Contingencies (Note 10)
Total Capitalization and Liabilities	9,401.3	9,356.4	8,936.8
Spire Missouri
ASSETS
Utility Plant	4,416.9	4,266.6	4,089.1
Less: Accumulated depreciation and amortization	949.2	905.1	869.9
Net Utility Plant	3,467.7	3,361.5	3,219.2
Other Investments	66.9	60.2	59.4
Accounts receivable:
Utility	288.6	279.0	363.9
Associated companies	3.6	4.7	2.8
Other	35.3	57.5	22.2
Allowance for credit losses	(27.0)	(22.6)	(26.6)
Delayed customer billings	53.5	2.4	18.4
Inventories:
Natural gas	80.9	176.7	115.6
Propane gas	8.6	8.7	8.7
Materials and supplies	18.6	15.0	15.8
Regulatory assets	112.7	276.3	37.5
Prepayments	16.0	19.7	18.9
Other	0.0	0.1	0.0
Regulatory assets	112.7	276.3	37.5
Prepayments	16.0	19.7	18.9
Other	0.0	0.1	0.0
Total Current Assets	590.8	817.5	577.2
Deferred Charges and Other Assets:
Goodwill	210.2	210.2	210.2
Regulatory assets	572.7	483.1	604.3
Other	126.4	125.6	99.0
Total Deferred Charges and Other Assets	909.3	818.9	913.5
Total Assets	5,034.7	5,058.1	4,769.3
Capitalization:
Paid-in capital and common stock	788.4	765.1	765.1
Retained earnings	960.5	817.0	822.6
Accumulated other comprehensive income	(4.0)	(4.2)	(2.7)
Total Shareholders' Equity	1,744.9	1,577.9	1,585.0
Long-term debt (less current portion)	1,637.1	1,338.4	1,092.4
Total Capitalization	3,382.0	2,916.3	2,677.4
Current Liabilities:
Notes payable	0.0	250.0	250.0
Notes payable – associated companies	277.2	240.9	369.4
Accounts payable	96.9	89.7	87.5
Notes receivable – associated companies	6.9	10.2	7.7
Advance customer billings	0.0	19.7	2.1
Wages and compensation accrued	27.1	40.3	28.0
Customer deposits	7.7	8.0	8.2
Taxes accrued	37.4	41.2	29.4
Regulatory liabilities	0.0	17.1	37.6
Other	49.4	47.4	43.4
Total Current Liabilities	502.6	764.5	863.3
Deferred Credits and Other Liabilities:
Deferred income taxes	498.9	480.0	470.9
Pension and postretirement benefit costs	132.9	159.5	193.7
Asset retirement obligations	146.3	143.4	156.5
Regulatory liabilities	313.7	538.8	353.5
Other	58.3	55.6	54.0
Total Deferred Credits and Other Liabilities	1,150.1	1,377.3	1,228.6
Commitments and Contingencies (Note 10)
Total Capitalization and Liabilities	5,034.7	5,058.1	4,769.3
Spire Alabama
ASSETS
Utility Plant	2,643.9	2,586.5	2,523.4
Less: Accumulated depreciation and amortization	1,154.0	1,124.8	1,136.5
Net Utility Plant	1,489.9	1,461.7	1,386.9
Current Assets:
Cash and cash equivalents	0.2	0.0	18.2
Accounts receivable:
Utility	86.0	49.8	66.4
Associated companies	0.7	0.6	0.5
Other	5.6	6.4	5.7
Allowance for credit losses	(7.1)	(6.6)	(6.5)
Delayed customer billings	1.2	6.7	2.3
Notes receivable – associated companies	0.0	0.0	20.0
Inventories:
Natural gas	32.0	35.5	14.8
Materials and supplies	13.1	10.8	10.0
Regulatory assets	41.0	18.8	11.8
Prepayments	3.6	5.4	4.7
Other	0.0	0.0	0.1
Regulatory assets	41.0	18.8	11.8
Prepayments	3.6	5.4	4.7
Other	0.0	0.0	0.1
Total Current Assets	176.3	127.4	148.0
Deferred Charges and Other Assets:
Regulatory assets	506.7	483.3	501.2
Deferred income taxes	9.1	34.2	33.2
Other	63.6	63.9	53.5
Total Deferred Charges and Other Assets	579.4	581.4	587.9
Total Assets	2,245.6	2,170.5	2,122.8
Capitalization:
Paid-in capital and common stock	322.9	328.9	328.9
Retained earnings	611.2	552.6	566.8
Total Shareholders' Equity	934.1	881.5	895.7
Long-term debt (less current portion)	571.4	571.2	571.1
Total Capitalization	1,505.5	1,452.7	1,466.8
Current Liabilities:
Current portion of long-term debt	0.0	50.0	50.0
Notes payable – associated companies	156.6	49.0	0.0
Accounts payable	50.8	52.3	37.4
Notes receivable – associated companies	6.2	6.0	8.0
Advance customer billings	5.2	11.2	5.4
Wages and compensation accrued	5.6	9.3	6.4
Customer deposits	19.0	18.4	19.0
Taxes accrued	24.3	30.4	25.1
Regulatory liabilities	0.0	13.4	14.2
Other	12.3	17.3	14.8
Total Current Liabilities	280.0	257.3	180.3
Deferred Credits and Other Liabilities:
Pension and postretirement benefit costs	59.1	66.7	68.2
Asset retirement obligations	370.0	362.8	381.7
Regulatory liabilities	24.7	23.4	18.0
Other	6.3	7.6	7.8
Total Deferred Credits and Other Liabilities	460.1	460.5	475.7
Commitments and Contingencies (Note 10)
Total Capitalization and Liabilities	$ 2,245.6	$ 2,170.5	$ 2,122.8