Spire Missouri 10-Q 4 Aug 22 2022 Q2 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	9 Months Ended
	Jun. 30, 2022	Jul. 31, 2022
Document Information [Line Items]
Entity Central Index Key	0001126956
Entity Registrant Name	Spire Inc.
Amendment Flag	false
Current Fiscal Year End Date	--09-30
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2022
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2022
Document Transition Report	false
Entity File Number	1-16681
Entity Address, Address Line One	700 Market Street
Entity Address, City or Town	St. Louis
Entity Address, State or Province	MO
Entity Address, Postal Zip Code	63101
City Area Code	314
Local Phone Number	342-0500
Entity Incorporation, State or Country Code	MO
Entity Tax Identification Number	74-2976504
Entity Common Stock, Shares Outstanding		52,492,777
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Spire Missouri [Member]
Document Information [Line Items]
Entity Central Index Key	0000057183
Entity Registrant Name	Spire Missouri Inc.
Amendment Flag	false
Current Fiscal Year End Date	--09-30
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2022
Entity File Number	1-1822
Entity Address, Address Line One	700 Market Street
Entity Address, State or Province	MO
Entity Address, Postal Zip Code	63101
City Area Code	314
Local Phone Number	342-0500
Entity Incorporation, State or Country Code	MO
Entity Tax Identification Number	43-0368139
Entity Common Stock, Shares Outstanding		25,325
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Spire Alabama Inc [Member]
Document Information [Line Items]
Entity Central Index Key	0000003146
Entity Registrant Name	Spire Alabama Inc.
Amendment Flag	false
Current Fiscal Year End Date	--09-30
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2022
Entity File Number	2-38960
Entity Address, Address Line One	605 Richard Arrington Blvd N
Entity Address, City or Town	Birmingham
Entity Address, State or Province	AL
Entity Address, Postal Zip Code	35203
City Area Code	205
Local Phone Number	326-8100
Entity Incorporation, State or Country Code	AL
Entity Tax Identification Number	63-0022000
Entity Common Stock, Shares Outstanding		1,972,052
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Depositary Shares [Member]
Document Information [Line Items]
Title of 12(b) Security	Depositary Shares
Trading Symbol	SR.PRA
Security Exchange Name	NYSE
Common Stock [Member]
Document Information [Line Items]
Title of 12(b) Security	Common Stock $1.00 par value
Trading Symbol	SR
Security Exchange Name	NYSE

Condensed Consolidated Statemen

Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended				9 Months Ended
	Jun. 30, 2022		Jun. 30, 2021		Jun. 30, 2022		Jun. 30, 2021
Operating Revenues	$ 448		$ 327.8		$ 1,884.3		$ 1,945.3
Operating Expenses:
Natural gas	203.3		96.9		844.5		897.2
Operation and maintenance	102.3		112		331.9		342.6
Depreciation and amortization	60.4		53.1		176.2		155.4
Taxes, other than income taxes	44.1		32.6		153.3		126.6
Total Operating Expenses	410.1		294.6		1,505.9		1,521.8
Operating Income	37.9		33.2		378.4		423.5
Interest Expense, Net	29.3		26.9		85.4		78.4
Other (Expense) Income, Net	(12.1)		(1)		(8.1)		5.1
(Loss) income Before Income Taxes	(3.5)		5.3		284.9		350.2
Income Tax (Benefit) Expense	(2.1)		0		57		68.6
Net (Loss) Income	(1.4)		5.3		227.9		281.6
Provision for preferred dividends	3.7		3.7		11.1		11.1
Income allocated to participating securities	0		0.1		0.3		0.5
Net (Loss) Income Available to Common Shareholders	(5.1)		1.5		216.5		270
Other Comprehensive Income, Net of Tax	18.5		(3.4)		28.6		43.1
Comprehensive (Loss) Income	17.1		1.9		256.5		324.7
Operating Revenues	$ 448		$ 327.8		$ 1,884.3		$ 1,945.3
Weighted Average Number of Common Shares Outstanding:
Basic (in shares)	52.2		51.6		51.9		51.6
Diluted (in shares)	52.3		51.7		52		51.7
Basic (Loss) Earnings Per Common Share (in dollars per share)	$ (0.10)		$ 0.03		$ 4.17		$ 5.24
Diluted (Loss) Earnings Per Common Share (in dollars per share)	$ (0.10)		$ 0.03		$ 4.16		$ 5.23
Operating Revenues	$ 448		$ 327.8		$ 1,884.3		$ 1,945.3
Spire Missouri [Member]
Operating Revenues	236.7		192.1		1,155.8		1,338.5
Operating Expenses:
Natural gas	94.7		55.6		538.8		754.6
Operation and maintenance	59.5		64.3		190.1		190
Depreciation and amortization	37.3		31.6		107.4		93
Taxes, other than income taxes	32.3		22.2		111		86.2
Total Operating Expenses	223.8		173.7		947.3		1,123.8
Operating Income	12.9		18.4		208.5		214.7
Interest Expense, Net	14.7		12.7		43.4		36.1
Other (Expense) Income, Net	(9.7)		(2.6)		(6.2)		0.9
(Loss) income Before Income Taxes	(11.5)		3.1		158.9		179.5
Income Tax (Benefit) Expense	(3.1)		0		23.8		26.7
Net (Loss) Income	(8.4)		3.1	[1]	135.1	[1]	152.8
Other Comprehensive Income, Net of Tax	0.2	[1]	0.1		0.4	[1]	0.3
Comprehensive (Loss) Income	(8.2)		3.2		135.5		153.1
Operating Revenues	236.7		192.1		1,155.8		1,338.5
Weighted Average Number of Common Shares Outstanding:
Operating Revenues	236.7		192.1		1,155.8		1,338.5
Spire Alabama Inc [Member]
Operating Revenues	115.7		93.3		446.4		429.5
Operating Expenses:
Natural gas	41		24.1		138.6		129
Operation and maintenance	29.2		31.9		96.6		98.4
Depreciation and amortization	16.9		16.1		50.1		46.3
Taxes, other than income taxes	8.6		7.9		32.1		30.8
Total Operating Expenses	95.7		80		317.4		304.5
Operating Income	20		13.3		129		125
Interest Expense, Net	5.2		5.2		15		15.2
Other (Expense) Income, Net	(0.7)		0.6		(0.2)		2
(Loss) income Before Income Taxes	14.1		8.7		113.8		111.8
Income Tax (Benefit) Expense	3.6		2.2		28.7		28.3
Net (Loss) Income	10.5		6.5		85.1		83.5
Operating Revenues	115.7		93.3		446.4		429.5
Weighted Average Number of Common Shares Outstanding:
Operating Revenues	$ 115.7		$ 93.3		$ 446.4		$ 429.5
[1]Accumulated other comprehensive income (loss)

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Net Income	$ (1.4)	$ 5.3	$ 227.9	$ 281.6
Other Comprehensive Income (Loss), Before Tax:
Net hedging gain (loss) arising during the period	24.3	(4.2)	38.2	56.5
Amounts reclassified into net income	(0.2)	(0.3)	(0.9)	(1)
Net gain (loss) on cash flow hedging derivative instruments	24.1	(4.5)	37.3	55.5
Net gain on defined benefit pension and other postretirement plans	0.2	0.1	0.4	0.3
Net unrealized loss on available for sale securities	(0.1)	0	(0.3)	(0.1)
Other Comprehensive Income (Loss), Before Tax	24.2	(4.4)	37.4	55.7
Income Tax Expense (Benefit) Related to Items of Other Comprehensive Income	5.7	(1)	8.8	12.6
Other Comprehensive Income (Loss), Net of Tax	18.5	(3.4)	28.6	43.1
Comprehensive (Loss) Income	$ 17.1	$ 1.9	$ 256.5	$ 324.7

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Millions	Jun. 30, 2022		Sep. 30, 2021		Jun. 30, 2021
ASSETS
Utility Plant	$ 7,549.7		$ 7,225		$ 7,110.2
Less: Accumulated depreciation and amortization	2,256.7		2,169.3		2,173.1
Net Utility Plant	5,293		5,055.7		4,937.1
Non-utility Property (net of accumulated depreciation and amortization of $46.0, $32.1 and $28.8 at June 30, 2022, September 30, 2021, and June 30, 2021, respectively)	476.9		471.1		463.6
Other Investments	90.5		83.1		76.4
Total Other Property and Investments	567.4		554.2		540
Other Property and Investments	567.4		554.2		540
Current Assets:
Cash and cash equivalents	16		4.3		23.9
Utility	266.1		338.4		342.6
Other	353.7		288.2		193.9
Allowance for credit losses	(32.6)		(30.3)		(34.5)
Delayed customer billings	45.4		9.2		13.2
Accounts receivable:
Utility	266.1		338.4		342.6
Other	353.7		288.2		193.9
Allowance for credit losses	(32.6)		(30.3)		(34.5)
Delayed customer billings	45.4		9.2		13.2
Inventories:
Natural gas	250.8		267.7		179.9
Propane gas	8.6		8.7		8.7
Materials and supplies	40.9		28.6		27.8
Regulatory assets	152		306.5		65.1
Prepayments	55		29		42.4
Other current assets	105.2		66.2		35.3
Total Current Assets	1,261.1		1,316.5		898.3
Deferred Charges and Other Assets:
Goodwill	1,171.6		1,171.6		1,171.6
Regulatory assets	1,205.6		993.5		1,119.4
Other	285.2		264.9		226.9
Total Deferred Charges and Other Assets	2,662.4		2,430		2,517.9
Total Assets	9,783.9		9,356.4		8,893.3
Capitalization:
Preferred stock ($25.00 par value per share; 10.0 million depositary shares authorized, issued and outstanding at June 30, 2022, September 30, 2021, and June 30, 2021)	242		242		242
Common stock (par value $1.00 per share; 70.0 million shares authorized; 52.5 million, 51.7 million, and 51.7 million shares issued and outstanding at June 30, 2022, September 30, 2021, and June 30, 2021, respectively)	52.5		51.7		51.7
Paid-in capital	1,570		1,517.9		1,513.9
Retained earnings	949.2		843		887.6
Accumulated other comprehensive income (loss)	32.2		3.6		1.9
Total Shareholders' Equity	2,845.9		2,658.2		2,697.1
Temporary equity	15		9.8		9.3
Long-term debt (less current portion)	3,207.9		2,939.1		2,939
Total Capitalization	6,068.8		5,607.1		5,645.4
Current Liabilities:
Current portion of long-term debt	31.2		55.8		110.8
Notes payable	709.2		672		461
Accounts payable	581.2		409.9		294.3
Advance customer billings	7.6		32.1		13.8
Wages and compensation accrued	50		59.5		56.1
Customer deposits	28.6		28.9		29.1
Taxes accrued	76.8		78.8		68.1
Regulatory liabilities	3.2		34.6		46.8
Other current liabilities	262.1		236.7		211.8
Total Current Liabilities	1,749.9		1,608.3		1,291.8
Deferred Credits and Other Liabilities:
Deferred income taxes	675.8		612.3		605.8
Pension and postretirement benefit costs	199.6		235.9		231.8
Asset retirement obligations	535.4		519.6		556.5
Regulatory liabilities	389		620.9		414.6
Other noncurrent liabilities	165.4		152.3		147.4
Total Deferred Credits and Other Liabilities	1,965.2		2,141		1,956.1
Commitments and Contingencies (Note 10)
Total Capitalization and Liabilities	9,783.9		9,356.4		8,893.3
Spire Missouri [Member]
ASSETS
Utility Plant	4,498.7		4,266.6		4,173.9
Less: Accumulated depreciation and amortization	965.7		905.1		883.3
Net Utility Plant	3,533		3,361.5		3,290.6
Total Other Property and Investments	61.3		60.2		60.7
Other Property and Investments	61.3		60.2		60.7
Current Assets:
Cash and cash equivalents	7		0		4.3
Utility	162.2		279		290.8
Associated companies	1.7		4.7		38.4
Other	12.2		57.5		21.5
Allowance for credit losses	(25.1)		(22.6)		(27.4)
Delayed customer billings	43.7		2.4		9.9
Accounts receivable:
Utility	162.2		279		290.8
Other	12.2		57.5		21.5
Allowance for credit losses	(25.1)		(22.6)		(27.4)
Delayed customer billings	43.7		2.4		9.9
Associated companies	1.7		4.7		38.4
Inventories:
Natural gas	140.4		176.7		133.3
Propane gas	8.6		8.7		8.7
Materials and supplies	22.1		15		15.4
Regulatory assets	89.9		276.3		36.6
Prepayments	31.6		19.7		28.4
Other current assets	0		0.1		0
Total Current Assets	494.3		817.5		559.9
Deferred Charges and Other Assets:
Goodwill	210.2		210.2		210.2
Regulatory assets	664.6		483.1		583.8
Other	127.2		125.6		98
Total Deferred Charges and Other Assets	1,002		818.9		892
Total Assets	5,090.6		5,058.1		4,803.2
Capitalization:
Retained earnings	952.1		817		825.7
Accumulated other comprehensive income (loss)	(3.8)		(4.2)		(2.6)
Total Shareholders' Equity	1,764.5	[1]	1,577.9	[1]	1,588.2
Long-term debt (less current portion)	1,637.4		1,338.4		1,338.6
Total Capitalization	3,401.9		2,916.3		2,926.8
Paid-in capital and common stock (par value $1.00 per share; 50.0 million shares authorized; 25,325, 24,577, and 24,577 shares issued and outstanding at June 30, 2022, September 30, 2021, and June 30, 2021, respectively)	816.2		765.1		765.1
Current Liabilities:
Notes payable	0		250		250
Accounts payable	110.5		89.7		58.8
Advance customer billings	0		19.7		5.4
Wages and compensation accrued	33.7		40.3		36.6
Customer deposits	7.1		8		8.1
Taxes accrued	41		41.2		33.9
Regulatory liabilities	0		17.1		27.1
Other current liabilities	45.1		47.4		43.6
Total Current Liabilities	538.3		764.5		688.6
Notes payable – associated companies	285.4		240.9		217.5
Accounts payable – associated companies	15.5		10.2		7.6
Deferred Credits and Other Liabilities:
Deferred income taxes	501.6		480		475.7
Pension and postretirement benefit costs	142		159.5		155.3
Asset retirement obligations	147.8		143.4		158.1
Regulatory liabilities	300.8		538.8		342.8
Other noncurrent liabilities	58.2		55.6		55.9
Total Deferred Credits and Other Liabilities	1,150.4		1,377.3		1,187.8
Total Capitalization and Liabilities	5,090.6		5,058.1		4,803.2
Spire Alabama Inc [Member]
ASSETS
Utility Plant	2,663		2,586.5		2,569.1
Less: Accumulated depreciation and amortization	1,153.8		1,124.8		1,150.4
Net Utility Plant	1,509.2		1,461.7		1,418.7
Current Assets:
Cash and cash equivalents	3.7		0		9.5
Utility	92.9		49.8		42.6
Associated companies	0.8		0.6		0.5
Other	5.8		6.4		5.6
Allowance for credit losses	(6.6)		(6.6)		(6)
Delayed customer billings	1.6		6.7		3.2
Accounts receivable:
Utility	92.9		49.8		42.6
Other	5.8		6.4		5.6
Allowance for credit losses	(6.6)		(6.6)		(6)
Delayed customer billings	1.6		6.7		3.2
Associated companies	0.8		0.6		0.5
Inventories:
Natural gas	69.1		35.5		24.5
Materials and supplies	15.3		10.8		9.7
Regulatory assets	52.9		18.8		17.1
Prepayments	8.3		5.4		8.2
Total Current Assets	243.8		127.4		114.9
Deferred Charges and Other Assets:
Regulatory assets	514.1		483.3		508.2
Other	81		63.9		53.6
Total Deferred Charges and Other Assets	600.6		581.4		592.7
Total Assets	2,353.6		2,170.5		2,126.3
Deferred income taxes	5.5		34.2		30.9
Capitalization:
Retained earnings	613.7		552.6		567.8
Total Shareholders' Equity	930.6		881.5		896.7
Long-term debt (less current portion)	571.4		571.2		571.2
Total Capitalization	1,502		1,452.7		1,467.9
Paid-in capital and common stock (par value $1.00 per share; 50.0 million shares authorized; 25,325, 24,577, and 24,577 shares issued and outstanding at June 30, 2022, September 30, 2021, and June 30, 2021, respectively)	316.9		328.9		328.9
Current Liabilities:
Current portion of long-term debt	0		50		50
Accounts payable	85.7		52.3		34.8
Advance customer billings	6.1		11.2		7.2
Wages and compensation accrued	7.6		9.3		8.6
Customer deposits	18.9		18.4		18.4
Taxes accrued	29.3		30.4		27.8
Regulatory liabilities	0		13.4		15.5
Other current liabilities	21.3		17.3		15.4
Total Current Liabilities	373.3		257.3		182.2
Notes payable – associated companies	196.3		49		0
Accounts payable – associated companies	8.1		6		4.5
Deferred Credits and Other Liabilities:
Pension and postretirement benefit costs	50.9		66.7		65.8
Asset retirement obligations	373.7		362.8		385.5
Regulatory liabilities	24		23.4		17.5
Other noncurrent liabilities	29.7		7.6		7.4
Total Deferred Credits and Other Liabilities	478.3		460.5		476.2
Total Capitalization and Liabilities	$ 2,353.6		$ 2,170.5		$ 2,126.3
[1]Accumulated other comprehensive income (loss)

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ in Millions	Jun. 30, 2022	Sep. 30, 2021	Jun. 30, 2021
Non-utility property, accumulated depreciation and amortization	$ 46	$ 32.1	$ 28.8
Preferred stock, par value (in dollars per share)	$ 25	$ 25	$ 25
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000	10,000,000
Preferred stock, shares issued (in shares)	10,000,000	10,000,000	10,000,000
Preferred stock, shares outstanding (in shares)	10,000,000	10,000,000	10,000,000
Common stock, par value (in dollars per share)	$ 1	$ 1	$ 1
Common stock, shares authorized (in shares)	70,000,000	70,000,000	70,000,000
Common stock, shares issued (in shares)	52,500,000	51,700,000	51,700,000
Common Stock, shares outstanding (in shares)	52,500,000	51,700,000	51,700,000
Spire Alabama Inc [Member]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	3,000,000	3,000,000	3,000,000
Common stock, shares issued (in shares)	2,000,000	2,000,000	2,000,000
Common Stock, shares outstanding (in shares)	2,000,000	2,000,000	2,000,000
Spire Missouri [Member]
Common stock, par value (in dollars per share)	$ 1	$ 1	$ 1
Common stock, shares authorized (in shares)	50,000,000	50,000,000	50,000,000
Common stock, shares issued (in shares)	25,325	24,577	24,577
Common Stock, shares outstanding (in shares)	25,325	24,577	24,577

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Millions	Spire Missouri [Member] Common Stock [Member]	Spire Missouri [Member] Additional Paid-in Capital [Member]	Spire Missouri [Member] Retained Earnings [Member]	Spire Missouri [Member] AOCI Attributable to Parent [Member]	Spire Missouri [Member]		Spire Alabama Inc [Member] Common Stock [Member]	Spire Alabama Inc [Member] Additional Paid-in Capital [Member]	Spire Alabama Inc [Member] Retained Earnings [Member]	Spire Alabama Inc [Member]	Common Stock [Member]	Preferred Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]		Total
Balance (in shares) at Sep. 30, 2020	24,577						1,972,052				51,611,789
Balance at Sep. 30, 2020	$ 0.1	$ 765	$ 672.9	$ (2.9)	$ 1,435.1		$ 0	$ 350.9	$ 500.8	$ 851.7	$ 51.6	$ 242	$ 1,549.2	$ 720.7	$ (41.2)	[1]	$ 2,522.3
Net Income	0	0	152.8	0	152.8		0	0	83.5	83.5	$ 0	0	0	281.6	0	[1]	281.6
Dividend reinvestment plan (in shares)											18,260
Dividend reinvestment plan											$ 0	0	1.1	0	0	[1]	1.1
Stock-based compensation costs											$ 0	0	5.4	0	0	[1]	5.4
Stock issued under stock-based compensation plans (in shares)											65,234
Stock issued under stock-based compensation plans											$ 0.1	0	(0.1)	0	0	[1]	0
Employees’ tax withholding for stock-based compensation (in shares)											(15,301)
Employees’ tax withholding for stock-based compensation											$ 0	0	(1)	0	0	[1]	(1)
Temporary equity adjustment to redemption value											0	0	0	(1.7)	0	[1]	(1.7)
Common stock dividends							0	0	(16.5)	(16.5)	0	0	0	(101.9)	0	[1]	(101.9)
Preferred stock dividends											0	0	0	(11.1)	0	[1]	(11.1)
Other Comprehensive Income, Net of Tax	$ 0	0	0	0.3	0.3						0	0	0	0	43.1	[1]	43.1
Equity units issued											$ 0	0	(40.7)	0	0	[1]	(40.7)
Return of capital to Spire							$ 0	(22)	0	(22)
Balance (in shares) at Jun. 30, 2021	24,577						1,972,052				51,679,982
Balance at Jun. 30, 2021	$ 0.1	765	825.7	(2.6)	1,588.2		$ 0	328.9	567.8	896.7	$ 51.7	242	1,513.9	887.6	1.9	[1]	2,697.1
Balance (in shares) at Mar. 31, 2021	24,577						1,972,052				51,674,256
Balance at Mar. 31, 2021	$ 0.1	765	822.6	(2.7)	1,585		$ 0	328.9	566.8	895.7	$ 51.7	242	1,512.2	920.1	5.3	[1]	2,731.3
Net Income	0	0	3.1	0	3.1	[1]	0	0	6.5	6.5	$ 0	0	0	5.3	0	[1]	5.3
Common stock issued (in shares)											0
Dividend reinvestment plan (in shares)											5,715
Dividend reinvestment plan											$ 0	0	0.4	0	0	[1]	0.4
Stock-based compensation costs											$ 0	0	2	0	0	[1]	2
Stock issued under stock-based compensation plans (in shares)											824
Stock issued under stock-based compensation plans											$ 0	0	0	0	0	[1]	0
Employees’ tax withholding for stock-based compensation (in shares)											(813)
Employees’ tax withholding for stock-based compensation											$ 0	0	(0.1)	0	0	[1]	(0.1)
Temporary equity adjustment to redemption value											0	0	0	0.4	0	[1]	0.4
Common stock dividends							$ 0	0	(5.5)	(5.5)	0	0	0	(34.5)	0	[1]	(34.5)
Preferred stock dividends											0	0	0	(3.7)	0	[1]	(3.7)
Other Comprehensive Income, Net of Tax	$ 0	0	0	0.1	0.1						0	0	0	0	(3.4)		(3.4)
Equity units issued											$ 0	0	(0.6)	0	0	[1]	(0.6)
Balance (in shares) at Jun. 30, 2021	24,577						1,972,052				51,679,982
Balance at Jun. 30, 2021	$ 0.1	765	825.7	(2.6)	1,588.2		$ 0	328.9	567.8	896.7	$ 51.7	242	1,513.9	887.6	1.9	[1]	2,697.1
Balance (in shares) at Sep. 30, 2021	24,577						1,972,052				51,684,883
Balance at Sep. 30, 2021	$ 0.1	765	817	(4.2)	1,577.9	[1]	$ 0	328.9	552.6	881.5	$ 51.7	242	1,517.9	843	3.6	[1]	2,658.2
Net Income	$ 0	0	135.1	0	135.1	[1]	0	0	85.1	85.1	$ 0	0	0	227.9	0	[1]	227.9
Common stock issued (in shares)	748										719,625
Common stock issued	$ 0	51.1	0	0	51.1						$ 0.7	0	50	0	0	[1]	50.7
Dividend reinvestment plan (in shares)											18,514
Dividend reinvestment plan											$ 0	0	1.2	0	0	[1]	1.2
Stock-based compensation costs											$ 0	0	2.7	0	0	[1]	2.7
Stock issued under stock-based compensation plans (in shares)											91,293
Stock issued under stock-based compensation plans											$ 0.1	0	(0.1)	0	0	[1]	0
Employees’ tax withholding for stock-based compensation (in shares)											(27,533)
Employees’ tax withholding for stock-based compensation											$ 0	0	(1.7)	0	0	[1]	(1.7)
Temporary equity adjustment to redemption value											0	0	0	(3.4)	0	[1]	(3.4)
Common stock dividends							0	0	(24)	(24)	0	0	0	(107.2)	0	[1]	(107.2)
Preferred stock dividends											0	0	0	(11.1)	0	[1]	(11.1)
Other Comprehensive Income, Net of Tax	$ 0	0	0	0.4	0.4	[1]					$ 0	0	0	0	28.6	[1]	28.6
Return of capital to Spire							$ 0	(12)	0	(12)
Balance (in shares) at Jun. 30, 2022	25,325						1,972,052				52,486,782
Balance at Jun. 30, 2022	$ 0.1	816.1	952.1	(3.8)	1,764.5	[1]	$ 0	316.9	613.7	930.6	$ 52.5	242	1,570	949.2	32.2	[1]	2,845.9
Balance (in shares) at Mar. 31, 2022	24,929						1,972,052				52,116,667
Balance at Mar. 31, 2022	$ 0.1	788.3	960.5	(4)	1,744.9	[1]	$ 0	322.9	611.2	934.1	$ 52.1	242	1,541.1	992.3	13.7	[1]	2,841.2
Net Income	$ 0	0	(8.4)	0	(8.4)		0	0	10.5	10.5	$ 0	0	0	(1.4)	0	[1]	(1.4)
Common stock issued (in shares)	396										365,625
Common stock issued	$ 0	27.8	0	0	27.8						$ 0.4	0	27.2	0	0	[1]	27.6
Dividend reinvestment plan (in shares)											5,245
Dividend reinvestment plan											$ 0	0	0.4	0	0	[1]	0.4
Stock-based compensation costs											$ 0	0	1.3	0	0	[1]	1.3
Stock issued under stock-based compensation plans (in shares)											(135)
Stock issued under stock-based compensation plans											$ 0	0	0	0	0	[1]	0
Employees’ tax withholding for stock-based compensation (in shares)											(620)
Employees’ tax withholding for stock-based compensation											$ 0	0	0	0	0	[1]	0
Temporary equity adjustment to redemption value											0	0	0	(2.2)	0	[1]	(2.2)
Common stock dividends							0	0	(8)	(8)	0	0	0	(35.8)	0	[1]	(35.8)
Preferred stock dividends											0	0	0	(3.7)	0	[1]	(3.7)
Other Comprehensive Income, Net of Tax	$ 0	0	0	0.2	0.2	[1]					$ 0	0	0	0	18.5	[1]	18.5
Return of capital to Spire							$ 0	(6)	0	(6)
Balance (in shares) at Jun. 30, 2022	25,325						1,972,052				52,486,782
Balance at Jun. 30, 2022	$ 0.1	$ 816.1	$ 952.1	$ (3.8)	$ 1,764.5	[1]	$ 0	$ 316.9	$ 613.7	$ 930.6	$ 52.5	$ 242	$ 1,570	$ 949.2	$ 32.2	[1]	$ 2,845.9
[1]Accumulated other comprehensive income (loss)

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Shareholders' Equity (Unaudited) (Parentheticals) - $ / shares	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Common stock, dividends per share declared (in dollars per share)	$ 0.685	$ 0.65	$ 2.055	$ 1.95
Preferred stock dividends per share declared (in dollars per share)	$ 0.36875	$ 0.36875	$ 1.10625	$ 1.10625

Condensed Consolidated Statem_5

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Jun. 30, 2022		Jun. 30, 2021
Operating Activities:
Net Income	$ 227.9		$ 281.6
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	176.2		155.4
Deferred income taxes and investment tax credits	57		68.4
Changes in assets and liabilities:
Accounts receivable	9.1		(248.6)
Inventories	4.9		(22.4)
Regulatory assets and liabilities	(323.8)		(3.1)
Accounts payable	180.3		79.7
Delayed/advance customer billings, net	(60.8)		(34.8)
Taxes accrued	(2.2)		(3.3)
Other assets and liabilities	(70.1)		(61.7)
Other	6.1		9.5
Net cash provided by operating activities	204.6		220.7
Delayed/advance customer billings, net	(60.8)		(34.8)
Investing Activities:
Capital expenditures	(402.5)		(463.2)
Other	4.2		1.5
Net cash used in investing activities	(398.3)		(461.7)
Financing Activities:
Issuance of long-term debt	300		629.1
Repayment of long-term debt	(55.8)		(60.4)
Issuance (repayment) of short-term debt, net	37.2		(187)
Issuance of common stock	51.9		0.6
Dividends paid on common stock	(105.9)		(99.6)
Dividends paid on preferred stock	(11.1)		(11.1)
Other financing activities	(3.8)		(10.8)
Net cash provided by financing activities	212.5		260.8
Net Increase in Cash, Cash Equivalents, and Restricted Cash	18.8		19.8
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period	11.3		4.1
Cash, Cash Equivalents, and Restricted Cash at End of Period	30.1		23.9
Supplemental disclosure of cash paid for:
Interest, net of amounts capitalized	(80.2)		(65.9)
Income taxes	(0.7)		(0.4)
Spire Missouri [Member]
Operating Activities:
Net Income	135.1	[1]	152.8
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	107.4		93
Deferred income taxes and investment tax credits	23.8		26.7
Changes in assets and liabilities:
Accounts receivable	167.6		(212.1)
Inventories	29.4		(36)
Regulatory assets and liabilities	(260.8)		(17.9)
Accounts payable	25.8		(1.1)
Delayed/advance customer billings, net	(61)		(34.8)
Taxes accrued	(0.2)		(5.2)
Other assets and liabilities	(48.5)		(95.8)
Other	1		0.5
Net cash provided by operating activities	119.6		(129.9)
Delayed/advance customer billings, net	(61)		(34.8)
Investing Activities:
Capital expenditures	(258.7)		(279.2)
Other	2.6		1.1
Net cash used in investing activities	(256.1)		(278.1)
Financing Activities:
Issuance of long-term debt	300		304.1
Repayment of long-term debt	0		(55)
Issuance (repayment) of short-term debt, net	(250)		250
Issuance of common stock	51.1		0
Other financing activities	(2.1)		(3.1)
Net cash provided by financing activities	143.5		412.3
Net Increase in Cash, Cash Equivalents, and Restricted Cash	7		4.3
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period	0		0
Cash, Cash Equivalents, and Restricted Cash at End of Period	7		4.3
Borrowings from (repayments to) Spire, net	44.5		(83.7)
Supplemental disclosure of cash paid for:
Interest, net of amounts capitalized	(43.9)		(33.1)
Income taxes	0		0
Spire Alabama Inc [Member]
Operating Activities:
Net Income	85.1		83.5
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	50.1		46.3
Deferred income taxes and investment tax credits	28.7		28.3
Changes in assets and liabilities:
Accounts receivable	(42.7)		(10.4)
Inventories	(38.1)		(3.3)
Regulatory assets and liabilities	(67.4)		7.1
Accounts payable	41.6		1.9
Delayed/advance customer billings, net	(0.1)		(0.1)
Taxes accrued	(1.2)		(0.2)
Other assets and liabilities	(17.4)		(8.2)
Other	0		0.2
Net cash provided by operating activities	38.6		145.1
Delayed/advance customer billings, net	(0.1)		(0.1)
Investing Activities:
Capital expenditures	(105)		(125.5)
Other	0.7		0.6
Net cash used in investing activities	(104.3)		(124.9)
Financing Activities:
Issuance of long-term debt	0		150
Repayment of long-term debt	(50)		0
Dividends paid on common stock	(16)		(16.5)
Other financing activities	0		(0.9)
Net cash provided by financing activities	69.4		(10.7)
Net Increase in Cash, Cash Equivalents, and Restricted Cash	3.7		9.5
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period	0		0
Cash, Cash Equivalents, and Restricted Cash at End of Period	3.7		9.5
Borrowings from (repayments to) Spire, net	147.4		(121.3)
Return of capital to Spire	(12)		(22)
Supplemental disclosure of cash paid for:
Interest, net of amounts capitalized	(14.7)		(13.2)
Income taxes	$ 0		$ 0
[1]Accumulated other comprehensive income (loss)

Note 1 - Summary of Significant

Note 1 - Summary of Significant Accounting Policies	9 Months Ended
	Jun. 30, 2022
Notes to Financial Statements
Significant Accounting Policies [Text Block]	1. BASIS OF PRESENTATION The accompanying unaudited financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (GAAP) for interim financial information with the instructions to Form 10 10 01 not 10 10 September 30, 2021 The consolidated financial position, results of operations, and cash flows of Spire include the accounts of the Company and all its subsidiaries. Transactions and balances between consolidated entities have been eliminated from the consolidated financial statements of Spire. In compliance with GAAP, transactions between Spire Missouri and Spire Alabama and their affiliates, as well as intercompany balances on their balance sheets, have not NATURE OF OPERATIONS Note 9 Nearly all the Company’s earnings are derived from its Gas Utility segment. Due to the seasonal nature of the Utilities’ business and the Spire Missouri rate design, earnings are typically concentrated during the heating season of November April not REGULATED OPERATIONS 980, Regulated Operations third may As authorized by the Missouri Public Service Commission (MoPSC), the Mississippi Public Service Commission (MSPSC) and the Alabama Public Service Commission (APSC), the Purchased Gas Adjustment (PGA) clauses and Gas Supply Adjustment (GSA) riders allow the Utilities to pass through to customers the cost of purchased gas supplies. Regulatory assets and liabilities related to the PGA clauses and the GSA riders are both labeled Unamortized Purchased Gas Adjustments herein. See additional information about regulatory assets and liabilities in Note 4 DERIVATIVES 815, Derivatives and Hedging not TRANSACTIONS WITH AFFILIATES 2021, Three Months Ended June 30, Nine Months Ended June 30, 2022 2021 2022 2021 Spire Missouri Purchases of natural gas from Spire Marketing Inc. $ 26.2 $ 9.2 $ 62.3 $ 77.5 Transportation services received from Spire STL Pipeline LLC 8.0 7.9 23.9 23.9 Sales of natural gas to Spire Marketing Inc. — — — 1.1 Transportation services received from Spire NGL Inc. — — — 0.5 Spire Alabama Purchases of natural gas from Spire Marketing Inc. $ 3.2 $ — $ 3.2 $ 10.6 Sales of natural gas to Spire Marketing Inc. — — — 0.1 RESTRICTED CASH June 30, 2022 June 30, 2022 September 30, 2021 ACCRUED CAPITAL EXPENDITURES June 30, September 30, June 30, 2022 2021 2021 Spire $ 52.6 $ 59.5 $ 41.5 Spire Missouri 39.2 37.1 27.6 Spire Alabama 7.7 13.6 6.7 ACCOUNTS RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES not Spire Spire Missouri Spire Alabama Three Months Ended June 30, 2022 2021 2022 2021 2022 2021 Allowance at beginning of period $ 35.1 $ 34.4 $ 27.0 $ 26.6 $ 7.1 $ 6.5 Provision for expected credit losses 1.9 1.9 1.8 1.8 — 0.1 Write-offs, net of recoveries (4.4 ) (1.8 ) (3.7 ) (1.0 ) (0.5 ) (0.6 ) Allowance at end of period $ 32.6 $ 34.5 $ 25.1 $ 27.4 $ 6.6 $ 6.0 Nine Months Ended June 30, 2022 2021 2022 2021 2022 2021 Allowance at beginning of period $ 30.3 $ 24.9 $ 22.6 $ 18.1 $ 6.6 $ 5.5 Provision for expected credit losses 8.6 12.6 8.6 10.8 — 1.4 Write-offs, net of recoveries (6.3 ) (3.0 ) (6.1 ) (1.5 ) — (0.9 ) Allowance at end of period $ 32.6 $ 34.5 $ 25.1 $ 27.4 $ 6.6 $ 6.0

Note 2 - Revenue

Note 2 - Revenue	9 Months Ended
	Jun. 30, 2022
Notes to Financial Statements
Revenue from Contract with Customer [Text Block]	2. The following tables show revenue disaggregated by source and customer type. Three Months Ended June 30, Nine Months Ended June 30, 2022 2021 2022 2021 Spire Gas Utility: Residential $ 239.5 $ 200.4 $ 1,268.8 $ 1,087.9 Commercial and industrial 86.2 63.6 275.6 535.8 Transportation 26.9 28.7 91.6 95.1 Off-system and other incentive 10.1 7.2 26.9 147.1 Other customer revenue 5.6 3.9 15.7 (5.8 ) Total revenue from contracts with customers 368.3 303.8 1,678.6 1,860.1 Changes in accrued revenue under alternative revenue programs 9.1 2.9 19.7 (2.1 ) Total Gas Utility operating revenues 377.4 306.7 1,698.3 1,858.0 Gas Marketing 64.1 15.1 171.4 73.3 Other 18.7 17.8 53.4 50.1 Total before eliminations 460.2 339.6 1,923.1 1,981.4 Intersegment eliminations (see Note 9, Information by Operating Segment) (12.2 ) (11.8 ) (38.8 ) (36.1 ) Total Operating Revenues $ 448.0 $ 327.8 $ 1,884.3 $ 1,945.3 Spire Missouri Residential $ 171.1 $ 144.4 $ 947.3 $ 772.8 Commercial and industrial 51.9 35.0 140.0 408.9 Transportation 7.1 7.4 26.4 26.3 Off-system and other incentive 4.5 4.5 20.3 140.4 Other customer revenue 3.2 2.0 9.1 (12.6 ) Total revenue from contracts with customers 237.8 193.3 1,143.1 1,335.8 Changes in accrued revenue under alternative revenue programs (1.1 ) (1.2 ) 12.7 2.7 Total Operating Revenues $ 236.7 $ 192.1 $ 1,155.8 $ 1,338.5 Spire Alabama Residential $ 56.2 $ 45.6 $ 266.2 $ 259.6 Commercial and industrial 24.0 21.3 101.6 98.8 Transportation 17.4 18.7 57.5 60.9 Off-system and other incentive 5.6 2.8 6.6 6.7 Other customer revenue 1.5 1.2 4.2 3.2 Total revenue from contracts with customers 104.7 89.6 436.1 429.2 Changes in accrued revenue under alternative revenue programs 11.0 3.7 10.3 0.3 Total Operating Revenues $ 115.7 $ 93.3 $ 446.4 $ 429.5 As discussed in Note 4 1 nine June 30, 2022 2022 February 2021 2 February 2021, nine June 30, 2021 Gross receipts taxes associated with the Company’s natural gas utility services are imposed on the Company, Spire Missouri, and Spire Alabama and billed to its customers. The expense amounts (shown in the table below) are reported gross in the “Taxes, other than income taxes” line in the statements of income, and corresponding revenues are reported in “Operating Revenues.” Three Months Ended June 30, Nine Months Ended June 30, 2022 2021 2022 2021 Spire $ 23.3 $ 17.9 $ 97.1 $ 81.8 Spire Missouri 16.7 12.3 70.6 56.1 Spire Alabama 5.5 4.7 22.5 21.8

Note 3 - Earnings Per Common Sh

Note 3 - Earnings Per Common Share	9 Months Ended
	Jun. 30, 2022
Notes to Financial Statements
Earnings Per Share [Text Block]	3. Three Months Ended June 30, Nine Months Ended June 30, 2022 2021 2022 2021 Basic Earnings Per Common Share: Net (Loss) Income $ (1.4 ) $ 5.3 $ 227.9 $ 281.6 Less: Provision for preferred dividends 3.7 3.7 11.1 11.1 Income allocated to participating securities — 0.1 0.3 0.5 (Loss) Income Available to Common Shareholders $ (5.1 ) $ 1.5 $ 216.5 $ 270.0 Weighted Average Common Shares Outstanding (in millions) 52.2 51.6 51.9 51.6 Basic (Loss) Earnings Per Common Share $ (0.10 ) $ 0.03 $ 4.17 $ 5.24 Diluted Earnings Per Common Share: Net (Loss) Income $ (1.4 ) $ 5.3 $ 227.9 $ 281.6 Less: Provision for preferred dividends 3.7 3.7 11.1 11.1 Income allocated to participating securities — 0.1 0.3 0.5 (Loss) Income Available to Common Shareholders $ (5.1 ) $ 1.5 $ 216.5 $ 270.0 Weighted Average Common Shares Outstanding (in millions) 52.2 51.6 51.9 51.6 Dilutive Effect of Restricted Stock and Restricted Stock Units (in millions)* 0.1 0.1 0.1 0.1 Weighted Average Diluted Common Shares (in millions) 52.3 51.7 52.0 51.7 Diluted (Loss) Earnings Per Common Share $ (0.10 ) $ 0.03 $ 4.16 $ 5.23 * Calculation excludes certain outstanding common shares (shown in millions by period at the right) attributable to stock units subject to performance or market conditions and restricted stock, which could have a dilutive effect in the future 0.1 0.1 0.2 0.1

Note 4 - Regulatory Matters

Note 4 - Regulatory Matters	9 Months Ended
	Jun. 30, 2022
Notes to Financial Statements
Public Utilities Disclosure [Text Block]	4. As explained in Note 1 980, Regulated Operations June 30, 2022 September 30, 2021 June 30, 2021 June 30, September 30, June 30, Spire 2022 2021 2021 Regulatory Assets: Current: Pension and postretirement benefit costs $ — $ 31.1 $ 31.0 Unamortized purchased gas adjustments 123.4 243.5 0.5 Other 28.6 31.9 33.6 Total Current Regulatory Assets 152.0 306.5 65.1 Noncurrent: Pension and postretirement benefit costs 317.5 313.8 377.3 Cost of removal 471.9 431.9 449.1 Future income taxes due from customers 140.4 132.9 130.2 Energy efficiency 54.1 47.6 45.6 Unamortized purchased gas adjustments 97.4 — 43.9 Other 124.3 67.3 73.3 Total Noncurrent Regulatory Assets 1,205.6 993.5 1,119.4 Total Regulatory Assets $ 1,357.6 $ 1,300.0 $ 1,184.5 Regulatory Liabilities: Current: Pension and postretirement benefit costs $ — $ 5.8 $ 5.8 Unamortized purchased gas adjustments — 11.0 23.0 Other 3.2 17.8 18.0 Total Current Regulatory Liabilities 3.2 34.6 46.8 Noncurrent: Deferred taxes due to customers 148.7 127.5 130.4 Pension and postretirement benefit costs 185.0 159.3 176.7 Accrued cost of removal 40.7 36.2 29.1 Unamortized purchased gas adjustments — 284.3 42.2 Other 14.6 13.6 36.2 Total Noncurrent Regulatory Liabilities 389.0 620.9 414.6 Total Regulatory Liabilities $ 392.2 $ 655.5 $ 461.4 June 30, September 30, June 30, Spire Missouri 2022 2021 2021 Regulatory Assets: Current: Pension and postretirement benefit costs $ — $ 21.9 $ 21.9 Unamortized purchased gas adjustments 89.7 242.8 — Other 0.2 11.6 14.7 Total Current Regulatory Assets 89.9 276.3 36.6 Noncurrent: Future income taxes due from customers 131.8 124.2 121.5 Pension and postretirement benefit costs 238.5 226.0 287.3 Energy efficiency 54.1 47.6 45.6 Unamortized purchased gas adjustments 97.4 — 43.9 Cost of removal 34.9 34.9 29.4 Other 107.9 50.4 56.1 Total Noncurrent Regulatory Assets 664.6 483.1 583.8 Total Regulatory Assets $ 754.5 $ 759.4 $ 620.4 Regulatory Liabilities: Current: Pension and postretirement benefit costs $ — $ 3.6 $ 3.6 Unamortized purchased gas adjustments — — 9.0 Other — 13.5 14.5 Total Current Regulatory Liabilities — 17.1 27.1 Noncurrent: Deferred taxes due to customers 131.3 110.2 113.0 Pension and postretirement benefit costs 154.5 131.4 157.0 Accrued cost of removal 7.3 4.9 — Unamortized purchased gas adjustments — 284.3 42.2 Other 7.7 8.0 30.6 Total Noncurrent Regulatory Liabilities 300.8 538.8 342.8 Total Regulatory Liabilities $ 300.8 $ 555.9 $ 369.9 June 30, September 30, June 30, Spire Alabama 2022 2021 2021 Regulatory Assets: Current: Pension and postretirement benefit costs $ — $ 8.2 $ 8.2 Unamortized purchased gas adjustments 31.6 — — Other 21.3 10.6 8.9 Total Current Regulatory Assets 52.9 18.8 17.1 Noncurrent: Future income taxes due from customers 2.2 2.2 2.2 Pension and postretirement benefit costs 73.8 82.9 85.1 Cost of removal 437.0 397.0 419.7 Other 1.1 1.2 1.2 Total Noncurrent Regulatory Assets 514.1 483.3 508.2 Total Regulatory Assets $ 567.0 $ 502.1 $ 525.3 Regulatory Liabilities: Current: Pension and postretirement benefit costs $ — $ 2.2 $ 2.2 Unamortized purchased gas adjustments — 10.2 13.1 Other — 1.0 0.2 Total Current Regulatory Liabilities — 13.4 15.5 Noncurrent: Pension and postretirement benefit costs 20.4 19.8 13.9 Other 3.6 3.6 3.6 Total Noncurrent Regulatory Liabilities 24.0 23.4 17.5 Total Regulatory Liabilities $ 24.0 $ 36.8 $ 33.0 A portion of the Company’s and Spire Missouri’s regulatory assets are not June 30, September 30, June 30, 2022 2021 2021 Spire Pension and postretirement benefit costs $ 165.8 $ 165.7 $ 194.4 Future income taxes due from customers 138.2 130.7 128.0 Unamortized purchased gas adjustments 187.2 242.8 — Other 130.9 86.0 130.5 Total Regulatory Assets Not Earning a Return $ 622.1 $ 625.2 $ 452.9 Spire Missouri Pension and postretirement benefit costs $ 165.8 $ 165.7 $ 194.4 Future income taxes due from customers 131.8 124.2 121.5 Unamortized purchased gas adjustments 187.2 242.8 — Other 130.9 86.0 130.5 Total Regulatory Assets Not Earning a Return $ 615.7 $ 618.7 $ 446.4 Like all the Company’s regulatory assets, these regulatory assets are expected to be recovered from customers in future rates. The recovery period for the future income taxes due from customers and pension and other postretirement benefit costs could be 20 years or longer, based on current Internal Revenue Service guidelines and average remaining service life of active participants, respectively. For the PGA assets, the recovery period is normally approximately one three not not not not Spire Missouri The MoPSC approved compliance tariffs with an effective date of December 23, 2021, 2021 0108. November 12, 2021, March 18, 2022. April 13, 2022, may December 23, 2021 June 30, 2022, • $12.5 in accordance with new capitalization rates determined by the study and audit; • $12.9 of prudent costs which are in excess of the capitalization rates determined by the study and audit; and • $5.0 of prudent costs related to the ISRS settlement discussed below. On April 1, 2022, nine eleven August September 2022. November 28, 2022. September 30, 2021, May 31, 2022, September 30, 2022. In mid- February 2021, third three not first 2022, no not February 2022, second 2022. May 2022. not As a result of the significant net deferred gas costs and average inventory cost in the second 2021, three 2020 2021. On December 22, 2021, three February 23, 2022, On December 23, 2021, first 2020, June December 2021. April 21, 2022, May 2022. June 3, 2022, first 2020, January June 2022. On May 27, 2022, first no July 11, 2022, July 29 August 1, 2022, not Spire Alabama On October 26, 2021, September 30, 2022, January 1, 2022. Spire Alabama filed GSA rate increases effective December 1, 2021, April 1, 2022, August 1, 2022, On July 12, 2022, not not Spire In addition to those discussed above for Spire Missouri and Spire Alabama, Spire is affected by the following regulatory matters. In October 2021, 2022 January 3, 2022. On August 23, 2021, June 30, 2021, January 18, 2022, February 1, 2022. In August 2018, “August 2018 November 2018, November 2019, November 2019, August 2018 one January 2020, two June 22, 2021, September 14, 2021, December 3, 2021, December 3, 2021 February 3, 2022. March 7, 2022, one December 3, 2021 June 29, 2022, Meanwhile, on December 15, 2021, June 17, 2022, not not October 7, 2022. Spire STL Pipeline will continue to pursue all legal and regulatory avenues to ensure access to reliable, affordable and safe delivery of energy for eastern Missouri. While there is no may may On October 9, 2020, 7 March 15, 2022, not May 19, 2022, June 21, 2022,

Note 5 - Financing

Note 5 - Financing	9 Months Ended
	Jun. 30, 2022
Notes to Financial Statements
Debt Disclosure [Text Block]	5. Short-term Spire, Spire Missouri and Spire Alabama have a syndicated revolving credit facility pursuant to a loan agreement with 12 July 22, 2022, July 22, 2027. may three $1,300.0 may no June 30, 2022 June 30, 2022 Spire utilizes a commercial paper program (“CP Program”) pursuant to which Spire may may not may 365 In March 2021, March 2022. Information about short-term borrowings, including Spire Missouri’s and Spire Alabama’s borrowings from Spire, is presented in the following table. As of June 30, 2022 Spire (Parent Only) Spire Missouri Spire Alabama Spire CP Term Spire Spire Consol- Program Loan Note Note idated Nine Months Ended June 30, 2022 Highest borrowings outstanding $ 749.5 $ 250.0 $ 412.0 $ 199.9 $ 996.8 Lowest borrowings outstanding 408.0 — 43.2 38.4 462.5 Weighted average borrowings 565.3 151.1 217.7 128.2 716.4 Weighted average interest rate 0.6 % 0.8 % 0.6 % 0.7 % 0.6 % As of June 30, 2022 Borrowings outstanding $ 709.2 $ — $ 285.4 $ 196.3 $ 709.2 Weighted average interest rate 2.0 % n/a 2.0 % 2.0 % 2.0 % As of September 30, 2021 Borrowings outstanding $ 422.0 $ 250.0 $ 240.9 $ 49.0 $ 672.0 Weighted average interest rate 0.2 % 0.7 % 0.2 % 0.2 % 0.4 % As of June 30, 2021 Borrowings outstanding $ 211.0 $ 250.0 $ 217.5 $ — $ 461.0 Weighted average interest rate 0.2 % 0.7 % 0.2 % n/a 0.4 % Long-term The long-term debt agreements of Spire, Spire Missouri and Spire Alabama contain customary financial covenants and default provisions. As of June 30, 2022 no Interest expense shown on the statements of income is net of the capitalized interest amounts shown in the following table. Three Months Ended June 30, Nine Months Ended June 30, 2022 2021 2022 2021 Spire $ 1.1 $ 1.1 $ 3.2 $ 3.1 Spire Missouri 0.2 — 0.3 0.1 Spire Alabama 0.9 0.8 2.5 2.1 On December 7, 2021, 3 first December 2, 2024, first

Note 6 - Fair Value of Financia

Note 6 - Fair Value of Financial Instruments	9 Months Ended
	Jun. 30, 2022
Notes to Financial Statements
Fair Value Disclosures [Text Block]	6. The carrying amounts of cash and cash equivalents, notes receivable, and short-term debt approximate fair value due to the short maturity of these instruments. The fair values of long-term debt are estimated based on market prices for similar issues. Refer to Note 7 The carrying amounts and estimated fair values of financial instruments not no 3 June 30, 2022 September 30, 2021 June 30, 2021 Classification of Estimated Fair Value Carrying Amount Fair Value Quoted Prices in Active Markets (Level 1) Significant Observable Inputs (Level 2) Spire As of June 30, 2022 Cash and cash equivalents $ 16.0 $ 16.0 $ 16.0 $ — Notes payable 709.2 709.2 — 709.2 Long-term debt, including current portion 3,239.1 3,032.1 — 3,032.1 As of September 30, 2021 Cash and cash equivalents $ 4.3 $ 4.3 $ 4.3 $ — Notes payable 672.0 672.0 — 672.0 Long-term debt, including current portion 2,994.9 3,375.9 — 3,375.9 As of June 30, 2021 Cash and cash equivalents $ 23.9 $ 23.9 $ 23.9 $ — Notes payable 461.0 461.0 — 461.0 Long-term debt, including current portion 3,049.8 3,440.2 — 3,440.2 Spire Missouri As of June 30, 2022 Cash and cash equivalents $ 7.0 $ 7.0 $ 7.0 $ — Notes payable – associated companies 285.4 285.4 — 285.4 Long-term debt 1,637.4 1,562.4 — 1,562.4 As of September 30, 2021 Notes payable $ 250.0 $ 250.0 $ — $ 250.0 Notes payable – associated companies 240.9 240.9 — 240.9 Long-term debt 1,338.4 1,540.4 — 1,540.4 As of June 30, 2021 Cash and cash equivalents $ 4.3 $ 4.3 $ 4.3 $ — Notes payable 250.0 250.0 — 250.0 Notes payable – associated companies 217.5 217.5 — 217.5 Long-term debt 1,338.6 1,548.8 — 1,548.8 Spire Alabama As of June 30, 2022 Cash and cash equivalents $ 3.7 $ 3.7 $ 3.7 $ — Notes payable – associated companies 196.3 196.3 — 196.3 Long-term debt, including current portion 571.4 527.2 — 527.2 As of September 30, 2021 Notes payable – associated companies $ 49.0 $ 49.0 $ — $ 49.0 Long-term debt 621.2 707.5 — 707.5 As of June 30, 2021 Cash and cash equivalents $ 9.5 $ 9.5 $ 9.5 $ — Long-term debt, including current portion 621.2 710.5 — 710.5

Note 7 - Fair Value Measurement

Note 7 - Fair Value Measurements	9 Months Ended
	Jun. 30, 2022
Notes to Financial Statements
Fair Value Measurement and Measurement Inputs, Recurring and Nonrecurring [Text Block]	7. The information presented in the following tables categorizes the assets and liabilities in the balance sheets that are accounted for at fair value on a recurring basis in periods subsequent to initial recognition. The mutual funds included in Level 1 Derivative instruments included in Level 1 2 2 3 no 3 June 30, 2022 September 30, 2021 June 30, 2021 The mutual funds are included in “Other Investments” on the Company’s balance sheets and in “Other Property and Investments” on Spire Missouri’s balance sheets. Derivative assets and liabilities, including receivables and payables associated with cash margin requirements, are presented net in the balance sheets when a legally enforceable netting agreement exists between the Company, Spire Missouri, or Spire Alabama and the counterparty to a derivative contract. Spire Quoted Prices in Active Markets (Level 1) Significant Observable Inputs (Level 2) Effects of Netting and Cash Margin Receivables /Payables Total As of June 30, 2022 ASSETS Gas Utility: U.S. stock/bond mutual funds $ 20.3 $ — $ — $ 20.3 NYMEX/ICE natural gas contracts 39.6 — (39.6 ) — Gas Marketing: NYMEX/ICE natural gas contracts — 94.2 (94.2 ) — Natural gas commodity contracts — 57.6 (5.3 ) 52.3 Other: U.S. stock/bond mutual funds 31.6 — — 31.6 Interest rate swaps 52.7 — (7.6 ) 45.1 Total $ 144.2 $ 151.8 $ (146.7 ) $ 149.3 LIABILITIES Gas Utility: NYMEX/ICE natural gas contracts $ 12.8 $ — $ (12.8 ) $ — Gas Marketing: NYMEX/ICE natural gas contracts — 60.8 (60.8 ) — Natural gas commodity contracts — 118.3 (5.3 ) 113.0 Other: Interest rate swaps 7.6 — (7.6 ) — Total $ 20.4 $ 179.1 $ (86.5 ) $ 113.0 Quoted Prices in Active Markets (Level 1) Significant Observable Inputs (Level 2) Effects of Netting and Cash Margin Receivables /Payables Total As of September 30, 2021 ASSETS Gas Utility: U.S. stock/bond mutual funds $ 23.8 $ — $ — $ 23.8 NYMEX/ICE natural gas contracts 104.0 — (104.0 ) — Gas Marketing: NYMEX/ICE natural gas contracts — 114.7 (93.7 ) 21.0 Natural gas commodity contracts — 35.2 (5.5 ) 29.7 Other: U.S. stock/bond mutual funds 26.2 — — 26.2 Interest rate swaps 12.6 — (5.2 ) 7.4 Total $ 166.6 $ 149.9 $ (208.4 ) $ 108.1 LIABILITIES Gas Utility: NYMEX/ICE natural gas contracts $ 0.3 $ — $ (0.3 ) $ — Gas Marketing: NYMEX/ICE natural gas contracts — 62.0 (62.0 ) — Natural gas commodity contracts — 96.7 (5.5 ) 91.2 Other: Interest rate swaps 5.7 — (5.2 ) 0.5 Total $ 6.0 $ 158.7 $ (73.0 ) $ 91.7 As of June 30, 2021 ASSETS Gas Utility: U.S. stock/bond mutual funds $ 24.3 $ — $ — $ 24.3 NYMEX/ICE natural gas contracts 25.3 — (25.3 ) — Gas Marketing: NYMEX/ICE natural gas contracts — 47.5 (47.5 ) — Natural gas commodity contracts — 20.2 — 20.2 Other: U.S. stock/bond mutual funds 21.5 — — 21.5 Interest rate swaps — 9.0 (5.5 ) 3.5 Total $ 71.1 $ 76.7 $ (78.3 ) $ 69.5 LIABILITIES Gas Marketing: NYMEX/ICE natural gas contracts $ — $ 18.8 $ (16.0 ) $ 2.8 Natural gas commodity contracts — 57.8 — 57.8 Other: Interest rate swaps — 6.7 (5.5 ) 1.2 Total $ — $ 83.3 $ (21.5 ) $ 61.8 Spire Missouri Quoted Prices in Active Markets (Level 1) Significant Observable Inputs (Level 2) Effects of Netting and Cash Margin Receivables /Payables Total As of June 30, 2022 ASSETS U.S. stock/bond mutual funds $ 20.3 $ — $ — $ 20.3 NYMEX/ICE natural gas contracts 39.6 — (39.6 ) — Total $ 59.9 $ — $ (39.6 ) $ 20.3 LIABILITIES NYMEX/ICE natural gas contracts $ 12.8 $ — $ (12.8 ) $ — As of September 30, 2021 ASSETS U.S. stock/bond mutual funds $ 23.8 $ — $ — $ 23.8 NYMEX/ICE natural gas contracts 104.0 — (104.0 ) — Total $ 127.8 $ — $ (104.0 ) $ 23.8 LIABILITIES NYMEX/ICE natural gas contracts $ 0.3 $ — $ (0.3 ) $ — As of June 30, 2021 ASSETS U.S. stock/bond mutual funds $ 24.3 $ — $ — $ 24.3 NYMEX/ICE natural gas contracts 25.3 — (25.3 ) — Total $ 49.6 $ — $ (25.3 ) $ 24.3

Note 8 - Pension Plans and Othe

Note 8 - Pension Plans and Other Postretirement Benefits	9 Months Ended
	Jun. 30, 2022
Notes to Financial Statements
Retirement Benefits [Text Block]	8. Pension Plans Spire and the Utilities maintain pension plans for their employees. Spire Missouri and Spire Alabama have non-contributory, defined benefit, trusteed forms of pension plans covering the majority of their employees. Qualified plan assets are comprised of mutual and commingled funds consisting of U.S. equities with varying strategies, global equities, alternative investments, and fixed income investments. The net periodic pension cost includes components shown in the following tables. The components other than the service costs and regulatory adjustment are presented in “Other Income, Net” in the income statement, except for Spire Alabama’s losses on lump-sum settlements. Such losses are capitalized in regulatory balances and amortized over the remaining actuarial life of individuals in the plan, and that amortization is presented in “Other Income, Net.” Three Months Ended June 30, Nine Months Ended June 30, 2022 2021 2022 2021 Spire Service cost – benefits earned during the period $ 4.8 $ 5.5 $ 15.6 $ 16.4 Interest cost on projected benefit obligation 5.4 5.5 15.8 15.3 Expected return on plan assets (7.7 ) (8.5 ) (24.1 ) (23.6 ) Amortization of prior service credit (1.1 ) (0.9 ) (3.4 ) (2.4 ) Amortization of actuarial loss 2.5 3.8 9.8 11.6 Loss on lump-sum settlements 17.8 11.2 29.5 15.0 Subtotal 21.7 16.6 43.2 32.3 Regulatory adjustment (6.9 ) 1.3 2.5 19.9 Net pension cost $ 14.8 $ 17.9 $ 45.7 $ 52.2 Spire Missouri Service cost – benefits earned during the period $ 3.5 $ 3.9 $ 11.2 $ 11.7 Interest cost on projected benefit obligation 3.8 3.5 10.9 10.5 Expected return on plan assets (5.7 ) (5.7 ) (17.6 ) (16.9 ) Amortization of prior service credit (0.5 ) (0.2 ) (1.5 ) (0.5 ) Amortization of actuarial loss 2.0 2.8 7.6 8.5 Loss on lump-sum settlements 17.3 9.1 24.1 9.1 Subtotal 20.4 13.4 34.7 22.4 Regulatory adjustment (8.3 ) (1.4 ) 1.3 13.7 Net pension cost $ 12.1 $ 12.0 $ 36.0 $ 36.1 Spire Alabama Service cost – benefits earned during the period $ 1.1 $ 1.3 $ 3.8 $ 4.2 Interest cost on projected benefit obligation 1.1 1.1 3.4 3.5 Expected return on plan assets (1.2 ) (1.4 ) (4.0 ) (4.5 ) Amortization of prior service credit (0.6 ) (0.6 ) (1.8 ) (1.8 ) Amortization of actuarial loss 0.5 1.0 2.2 3.1 Loss on lump-sum settlements 0.5 2.1 5.4 5.9 Subtotal 1.4 3.5 9.0 10.4 Regulatory adjustment 1.1 2.5 0.5 5.6 Net pension cost $ 2.5 $ 6.0 $ 9.5 $ 16.0 Pursuant to the provisions of Spire Missouri’s and Spire Alabama’s pension plans, pension obligations may three nine June 30, 2022 one two February 28, 2022, February 28, 2022. one second June 30, 2022 For the three March 31, 2022, one two September 30, 2021, first second September 30, 2021. one second March 31, 2022. For the three June 30, 2021, two one September 30, 2020 first September 30, 2020 second March 31, 2021. March 31, 2021, one September 30, 2020. June 30, 2021 March 31, 2021. Effective December 23, 2021, Also effective December 23, 2021, eight eight eight eight The funding policy of the Utilities is to contribute an amount not 2022 June 30, 2022 2022 June 30, 2022 Contributions to the qualified trusts of Spire Missouri’s pension plans for the remainder of fiscal 2022 2022 Other Postretirement Benefits Spire and the Utilities provide certain life insurance benefits at retirement. Spire Missouri plans provide for medical insurance after early retirement until age 65. January 1, 2015, The net periodic postretirement benefit cost includes components shown in the following tables. The components other than the service costs and regulatory adjustment are presented in “Other Income, Net” in the income statement, except in the event Spire Alabama incurs losses on lump-sum settlements. Any such losses are capitalized in regulatory balances and amortized over the remaining actuarial life of individuals in the plan, and that amortization is presented in “Other Income, Net.” Three Months Ended June 30, Nine Months Ended June 30, 2022 2021 2022 2021 Spire Service cost – benefits earned during the period $ 1.9 $ 1.7 $ 5.8 $ 5.4 Interest cost on accumulated postretirement benefit obligation 1.6 1.4 4.6 4.4 Expected return on plan assets (4.3 ) (4.0 ) (12.8 ) (12.1 ) Amortization of prior service cost 0.3 0.3 0.8 0.8 Amortization of actuarial gain (0.5 ) (0.4 ) (1.7 ) (1.2 ) Subtotal (1.0 ) (1.0 ) (3.3 ) (2.7 ) Regulatory adjustment (0.1 ) 3.5 3.2 10.1 Net postretirement benefit (income) cost $ (1.1 ) $ 2.5 $ (0.1 ) $ 7.4 Spire Missouri Service cost – benefits earned during the period $ 1.6 $ 1.5 $ 4.8 $ 4.6 Interest cost on accumulated postretirement benefit obligation 1.2 1.1 3.4 3.3 Expected return on plan assets (2.9 ) (2.6 ) (8.6 ) (8.1 ) Amortization of prior service cost 0.2 0.2 0.6 0.6 Amortization of actuarial gain (0.5 ) (0.4 ) (1.5 ) (1.1 ) Subtotal (0.4 ) (0.2 ) (1.3 ) (0.7 ) Regulatory adjustment 0.4 3.8 4.5 11.3 Net postretirement benefit cost $ — $ 3.6 $ 3.2 $ 10.6 Spire Alabama Service cost – benefits earned during the period $ 0.3 $ 0.2 $ 0.9 $ 0.7 Interest cost on accumulated postretirement benefit obligation 0.4 0.3 1.1 1.0 Expected return on plan assets (1.3 ) (1.3 ) (3.9 ) (3.8 ) Amortization of prior service cost 0.1 0.1 0.2 0.2 Subtotal (0.5 ) (0.7 ) (1.7 ) (1.9 ) Regulatory adjustment (0.5 ) (0.4 ) (1.4 ) (1.3 ) Net postretirement benefit income $ (1.0 ) $ (1.1 ) $ (3.1 ) $ (3.2 ) Missouri and Alabama state laws provide for the recovery in rates of costs accrued pursuant to GAAP provided that such costs are funded through an independent, external funding mechanism. The Utilities have established Voluntary Employees’ Beneficiary Association (VEBA) and Rabbi Trusts as external funding mechanisms. The assets of the VEBA and Rabbi Trusts consist primarily of money market securities and mutual funds invested in stocks and bonds. Effective December 23, 2021, no The Utilities’ funding policy is to contribute amounts to the trusts equal to the periodic benefit cost calculated pursuant to GAAP as recovered in rates. There have been no contributions to the postretirement plans through June 30, 2022

Note 9 - Information by Operati

Note 9 - Information by Operating Segment	9 Months Ended
	Jun. 30, 2022
Notes to Financial Statements
Segment Reporting Disclosure [Text Block]	9. The Company has two reportable segments: Gas Utility and Gas Marketing. The Gas Utility segment is the aggregation of the operations of the Utilities. The Gas Marketing segment includes the results of Spire Marketing, a subsidiary engaged in the non-regulated marketing of natural gas and related activities, including utilizing natural gas storage contracts for providing natural gas sales. Other components of the Company’s consolidated information include: • unallocated corporate items, including certain debt and associated interest costs; • Spire STL Pipeline, a subsidiary of Spire providing interstate natural gas pipeline transportation services; • Spire Storage, a subsidiary of Spire providing interstate natural gas storage services; and • Spire’s subsidiaries engaged in the operation of a propane pipeline and risk management, among other activities. Accounting policies are described in Note 1 Management evaluates the performance of the operating segments based on the computation of net economic earnings. Net economic earnings exclude from reported net income the after-tax impacts of fair value accounting and timing adjustments associated with energy-related transactions, the impacts of acquisition, divestiture and restructuring activities, and the largely non-cash impacts of impairments and other non-recurring or unusual items such as certain regulatory, legislative, or GAAP standard-setting actions. Gas Utility Gas Marketing Other Eliminations Consolidated Three Months Ended June 30, 2022 Operating Revenues: Revenues from external customers $ 377.4 $ 64.1 $ 6.5 $ — $ 448.0 Intersegment revenues — — 12.2 (12.2 ) — Total Operating Revenues 377.4 64.1 18.7 (12.2 ) 448.0 Operating Expenses: Natural gas 144.5 67.1 — (8.3 ) 203.3 Operation and maintenance 95.0 3.2 8.0 (3.9 ) 102.3 Depreciation and amortization 58.1 0.3 2.0 — 60.4 Taxes, other than income taxes 43.0 0.4 0.7 — 44.1 Total Operating Expenses 340.6 71.0 10.7 (12.2 ) 410.1 Operating Income (Loss) $ 36.8 $ (6.9 ) $ 8.0 $ — $ 37.9 Net Economic Earnings (Loss) $ 4.2 $ 0.4 $ (0.5 ) $ — $ 4.1 Gas Utility Gas Marketing Other Eliminations Consolidated Three Months Ended June 30, 2021 Operating Revenues: Revenues from external customers $ 306.7 $ 15.2 $ 5.9 $ — $ 327.8 Intersegment revenues — (0.1 ) 11.9 (11.8 ) — Total Operating Revenues 306.7 15.1 17.8 (11.8 ) 327.8 Operating Expenses: Natural gas 84.9 20.2 — (8.2 ) 96.9 Operation and maintenance 103.2 3.2 9.2 (3.6 ) 112.0 Depreciation and amortization 50.9 0.3 1.9 — 53.1 Taxes, other than income taxes 32.1 0.2 0.3 — 32.6 Total Operating Expenses 271.1 23.9 11.4 (11.8 ) 294.6 Operating Income (Loss) $ 35.6 $ (8.8 ) $ 6.4 $ — $ 33.2 Net Economic Earnings (Loss) $ 12.3 $ (5.2 ) $ (0.2 ) $ — $ 6.9 Gas Utility Gas Marketing Other Eliminations Consolidated Nine Months Ended June 30, 2022 Operating Revenues: Revenues from external customers $ 1,698.3 $ 171.4 $ 14.6 $ — $ 1,884.3 Intersegment revenues — — 38.8 (38.8 ) — Total Operating Revenues 1,698.3 171.4 53.4 (38.8 ) 1,884.3 Operating Expenses: Natural gas 710.7 160.9 — (27.1 ) 844.5 Operation and maintenance 306.5 9.1 28.0 (11.7 ) 331.9 Depreciation and amortization 169.2 1.0 6.0 — 176.2 Taxes, other than income taxes 150.3 0.8 2.2 — 153.3 Total Operating Expenses 1,336.7 171.8 36.2 (38.8 ) 1,505.9 Operating Income (Loss) $ 361.6 $ (0.4 ) $ 17.2 $ — $ 378.4 Net Economic Earnings (Loss) $ 240.6 $ 15.3 $ (8.2 ) $ — $ 247.7 Gas Utility Gas Marketing Other Eliminations Consolidated Nine Months Ended June 30, 2021 Operating Revenues: Revenues from external customers $ 1,856.9 $ 73.3 $ 15.1 $ — $ 1,945.3 Intersegment revenues 1.1 0.0 35.0 (36.1 ) — Total Operating Revenues 1,858.0 73.3 50.1 (36.1 ) 1,945.3 Operating Expenses: Natural gas 908.4 14.7 0.1 (26.0 ) 897.2 Operation and maintenance 310.2 13.6 28.9 (10.1 ) 342.6 Depreciation and amortization 149.0 0.9 5.5 — 155.4 Taxes, other than income taxes 124.0 0.9 1.7 — 126.6 Total Operating Expenses 1,491.6 30.1 36.2 (36.1 ) 1,521.8 Operating Income $ 366.4 $ 43.2 $ 13.9 $ — $ 423.5 Net Economic Earnings (Loss) $ 248.4 $ 37.9 $ (6.9 ) $ — $ 279.4 The following table reconciles the Company’s net economic earnings to net income. Three Months Ended June 30, Nine Months Ended June 30, 2022 2021 2022 2021 Net Income $ (1.4 ) $ 5.3 $ 227.9 $ 281.6 Adjustments, pre-tax: Missouri regulatory adjustment — — — (9.0 ) Fair value and timing adjustments 7.3 2.1 20.9 6.2 Income tax adjustments (1.8 ) (0.5 ) (1.1 ) 0.6 Net Economic Earnings $ 4.1 $ 6.9 $ 247.7 $ 279.4 The Company’s total assets by segment were as follows: June 30, September 30, June 30, 2022 2021 2021 Total Assets: Gas Utility $ 7,854.7 $ 7,615.4 $ 7,302.4 Gas Marketing 595.5 466.1 349.2 Other 2,652.9 2,351.7 2,256.3 Eliminations (1,319.2 ) (1,076.8 ) (1,014.6 ) Total Assets $ 9,783.9 $ 9,356.4 $ 8,893.3

Note 10 - Commitments and Conti

Note 10 - Commitments and Contingencies	9 Months Ended
	Jun. 30, 2022
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	10. Commitments The Company and the Utilities have entered into contracts with various counterparties, expiring on dates through 2039, June 30, 2022 November April. Contingencies The Company and the Utilities account for contingencies, including environmental liabilities, in accordance with accounting standards under the loss contingency guidance of ASC Topic 450, Contingencies In addition to matters noted below, the Company and the Utilities are involved in other litigation, claims, and investigations arising in the normal course of business. Management, after discussion with counsel, believes the final outcome will not The Company and the Utilities own and operate natural gas distribution, transmission, and storage facilities, the operations of which are subject to various environmental laws, regulations, and interpretations. While environmental issues resulting from such operations arise in the ordinary course of business, such issues have not may may may In the natural gas industry, many gas distribution companies have incurred environmental liabilities associated with sites they or their predecessor companies formerly owned or operated where manufactured gas operations took place. The Utilities each have former manufactured gas plant (MGP) operations in their respective service territories, some of which are discussed under the Spire Missouri and Spire Alabama headings below. To the extent costs are incurred associated with environmental remediation activities, the Utilities would request authority from their respective regulators to defer such costs (less any amounts received from insurance proceeds or as contributions from other potentially responsible parties (PRPs)) and collect them through future rates. To date, costs incurred for all Spire MGP sites for investigation, remediation, and monitoring have not may may In 2020, March 2021, not may Spire Missouri Spire Missouri has identified three two third In conjunction with redevelopment of the Carondelet Coke site, Spire Missouri and another former owner of the site entered into an agreement (the “Remediation Agreement”) with the City development agencies, the developer, and an environmental consultant that obligates one No December 20, 2010, seven six In a letter dated June 29, 2011, second January 10, 2012, no Additionally, in correspondence dated November 30, 2016, 7 107 1980 third not March 2017 Spire Missouri has notified its insurers that it seeks reimbursement for costs incurred in the past and future potential liabilities associated with these MGP sites. While some of the insurers have denied coverage and reserved their rights, Spire Missouri retains the right to seek potential reimbursements from them. On March 10, 2015, 104 7 April 3, 2015, July 15, 2015, August 15, 2015. no In its western service area, Spire Missouri has six #1, #1, #2. 2003 September 15, 2016, six May 11, 2015, Spire Alabama Spire Alabama is in the chain of title of nine four five one In 2011, "no In 2012, 104 35th not 35th Assessments were performed by the EPA of the former MGP sites in Gadsden and Anniston, and "no Spire In addition to those discussed above for Spire Missouri and Spire Alabama, Spire is aware of the following contingent matters. Spire Marketing, along with many natural gas industry participants, faced the unprecedented effects of Winter Storm Uri in February 2021. may

Significant Accounting Policies

Significant Accounting Policies (Policies)	9 Months Ended
	Jun. 30, 2022
Accounting Policies [Abstract]
Basis of Accounting, Policy [Policy Text Block]	BASIS OF PRESENTATION The accompanying unaudited financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (GAAP) for interim financial information with the instructions to Form 10 10 01 not 10 10 September 30, 2021 The consolidated financial position, results of operations, and cash flows of Spire include the accounts of the Company and all its subsidiaries. Transactions and balances between consolidated entities have been eliminated from the consolidated financial statements of Spire. In compliance with GAAP, transactions between Spire Missouri and Spire Alabama and their affiliates, as well as intercompany balances on their balance sheets, have not NATURE OF OPERATIONS Note 9 Nearly all the Company’s earnings are derived from its Gas Utility segment. Due to the seasonal nature of the Utilities’ business and the Spire Missouri rate design, earnings are typically concentrated during the heating season of November April not
Public Utilities, Policy [Policy Text Block]	REGULATED OPERATIONS 980, Regulated Operations third may As authorized by the Missouri Public Service Commission (MoPSC), the Mississippi Public Service Commission (MSPSC) and the Alabama Public Service Commission (APSC), the Purchased Gas Adjustment (PGA) clauses and Gas Supply Adjustment (GSA) riders allow the Utilities to pass through to customers the cost of purchased gas supplies. Regulatory assets and liabilities related to the PGA clauses and the GSA riders are both labeled Unamortized Purchased Gas Adjustments herein. See additional information about regulatory assets and liabilities in Note 4
Derivatives, Policy [Policy Text Block]	DERIVATIVES 815, Derivatives and Hedging not
Transactions With Affiliates [Policy Text Block]	TRANSACTIONS WITH AFFILIATES 2021, Three Months Ended June 30, Nine Months Ended June 30, 2022 2021 2022 2021 Spire Missouri Purchases of natural gas from Spire Marketing Inc. $ 26.2 $ 9.2 $ 62.3 $ 77.5 Transportation services received from Spire STL Pipeline LLC 8.0 7.9 23.9 23.9 Sales of natural gas to Spire Marketing Inc. — — — 1.1 Transportation services received from Spire NGL Inc. — — — 0.5 Spire Alabama Purchases of natural gas from Spire Marketing Inc. $ 3.2 $ — $ 3.2 $ 10.6 Sales of natural gas to Spire Marketing Inc. — — — 0.1
Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block]	RESTRICTED CASH June 30, 2022 June 30, 2022 September 30, 2021
Accrued Capital Expenditures [Policy Text Block]	ACCRUED CAPITAL EXPENDITURES June 30, September 30, June 30, 2022 2021 2021 Spire $ 52.6 $ 59.5 $ 41.5 Spire Missouri 39.2 37.1 27.6 Spire Alabama 7.7 13.6 6.7
Receivable [Policy Text Block]	ACCOUNTS RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES not Spire Spire Missouri Spire Alabama Three Months Ended June 30, 2022 2021 2022 2021 2022 2021 Allowance at beginning of period $ 35.1 $ 34.4 $ 27.0 $ 26.6 $ 7.1 $ 6.5 Provision for expected credit losses 1.9 1.9 1.8 1.8 — 0.1 Write-offs, net of recoveries (4.4 ) (1.8 ) (3.7 ) (1.0 ) (0.5 ) (0.6 ) Allowance at end of period $ 32.6 $ 34.5 $ 25.1 $ 27.4 $ 6.6 $ 6.0 Nine Months Ended June 30, 2022 2021 2022 2021 2022 2021 Allowance at beginning of period $ 30.3 $ 24.9 $ 22.6 $ 18.1 $ 6.6 $ 5.5 Provision for expected credit losses 8.6 12.6 8.6 10.8 — 1.4 Write-offs, net of recoveries (6.3 ) (3.0 ) (6.1 ) (1.5 ) — (0.9 ) Allowance at end of period $ 32.6 $ 34.5 $ 25.1 $ 27.4 $ 6.6 $ 6.0

Note 1 - Summary of Significa_2

Note 1 - Summary of Significant Accounting Policies (Tables)	9 Months Ended
	Jun. 30, 2022
Notes Tables
Schedule of Related Party Transactions [Table Text Block]	Three Months Ended June 30, Nine Months Ended June 30, 2022 2021 2022 2021 Spire Missouri Purchases of natural gas from Spire Marketing Inc. $ 26.2 $ 9.2 $ 62.3 $ 77.5 Transportation services received from Spire STL Pipeline LLC 8.0 7.9 23.9 23.9 Sales of natural gas to Spire Marketing Inc. — — — 1.1 Transportation services received from Spire NGL Inc. — — — 0.5 Spire Alabama Purchases of natural gas from Spire Marketing Inc. $ 3.2 $ — $ 3.2 $ 10.6 Sales of natural gas to Spire Marketing Inc. — — — 0.1
Schedule Of Capital Expenditure Excluded From Statement Of Cash Flow [Table Text Block]	June 30, September 30, June 30, 2022 2021 2021 Spire $ 52.6 $ 59.5 $ 41.5 Spire Missouri 39.2 37.1 27.6 Spire Alabama 7.7 13.6 6.7
Accounts Receivable, Allowance for Credit Loss [Table Text Block]	Spire Spire Missouri Spire Alabama Three Months Ended June 30, 2022 2021 2022 2021 2022 2021 Allowance at beginning of period $ 35.1 $ 34.4 $ 27.0 $ 26.6 $ 7.1 $ 6.5 Provision for expected credit losses 1.9 1.9 1.8 1.8 — 0.1 Write-offs, net of recoveries (4.4 ) (1.8 ) (3.7 ) (1.0 ) (0.5 ) (0.6 ) Allowance at end of period $ 32.6 $ 34.5 $ 25.1 $ 27.4 $ 6.6 $ 6.0 Nine Months Ended June 30, 2022 2021 2022 2021 2022 2021 Allowance at beginning of period $ 30.3 $ 24.9 $ 22.6 $ 18.1 $ 6.6 $ 5.5 Provision for expected credit losses 8.6 12.6 8.6 10.8 — 1.4 Write-offs, net of recoveries (6.3 ) (3.0 ) (6.1 ) (1.5 ) — (0.9 ) Allowance at end of period $ 32.6 $ 34.5 $ 25.1 $ 27.4 $ 6.6 $ 6.0

Note 2 - Revenue (Tables)

Note 2 - Revenue (Tables)	9 Months Ended
	Jun. 30, 2022
Notes Tables
Disaggregation of Revenue [Table Text Block]	Three Months Ended June 30, Nine Months Ended June 30, 2022 2021 2022 2021 Spire Gas Utility: Residential $ 239.5 $ 200.4 $ 1,268.8 $ 1,087.9 Commercial and industrial 86.2 63.6 275.6 535.8 Transportation 26.9 28.7 91.6 95.1 Off-system and other incentive 10.1 7.2 26.9 147.1 Other customer revenue 5.6 3.9 15.7 (5.8 ) Total revenue from contracts with customers 368.3 303.8 1,678.6 1,860.1 Changes in accrued revenue under alternative revenue programs 9.1 2.9 19.7 (2.1 ) Total Gas Utility operating revenues 377.4 306.7 1,698.3 1,858.0 Gas Marketing 64.1 15.1 171.4 73.3 Other 18.7 17.8 53.4 50.1 Total before eliminations 460.2 339.6 1,923.1 1,981.4 Intersegment eliminations (see Note 9, Information by Operating Segment) (12.2 ) (11.8 ) (38.8 ) (36.1 ) Total Operating Revenues $ 448.0 $ 327.8 $ 1,884.3 $ 1,945.3 Spire Missouri Residential $ 171.1 $ 144.4 $ 947.3 $ 772.8 Commercial and industrial 51.9 35.0 140.0 408.9 Transportation 7.1 7.4 26.4 26.3 Off-system and other incentive 4.5 4.5 20.3 140.4 Other customer revenue 3.2 2.0 9.1 (12.6 ) Total revenue from contracts with customers 237.8 193.3 1,143.1 1,335.8 Changes in accrued revenue under alternative revenue programs (1.1 ) (1.2 ) 12.7 2.7 Total Operating Revenues $ 236.7 $ 192.1 $ 1,155.8 $ 1,338.5 Spire Alabama Residential $ 56.2 $ 45.6 $ 266.2 $ 259.6 Commercial and industrial 24.0 21.3 101.6 98.8 Transportation 17.4 18.7 57.5 60.9 Off-system and other incentive 5.6 2.8 6.6 6.7 Other customer revenue 1.5 1.2 4.2 3.2 Total revenue from contracts with customers 104.7 89.6 436.1 429.2 Changes in accrued revenue under alternative revenue programs 11.0 3.7 10.3 0.3 Total Operating Revenues $ 115.7 $ 93.3 $ 446.4 $ 429.5
Schedule Of Taxes On Revenues [Table Text Block]	Three Months Ended June 30, Nine Months Ended June 30, 2022 2021 2022 2021 Spire $ 23.3 $ 17.9 $ 97.1 $ 81.8 Spire Missouri 16.7 12.3 70.6 56.1 Spire Alabama 5.5 4.7 22.5 21.8

Note 3 - Earnings Per Common _2

Note 3 - Earnings Per Common Share (Tables)	9 Months Ended
	Jun. 30, 2022
Notes Tables
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	Three Months Ended June 30, Nine Months Ended June 30, 2022 2021 2022 2021 Basic Earnings Per Common Share: Net (Loss) Income $ (1.4 ) $ 5.3 $ 227.9 $ 281.6 Less: Provision for preferred dividends 3.7 3.7 11.1 11.1 Income allocated to participating securities — 0.1 0.3 0.5 (Loss) Income Available to Common Shareholders $ (5.1 ) $ 1.5 $ 216.5 $ 270.0 Weighted Average Common Shares Outstanding (in millions) 52.2 51.6 51.9 51.6 Basic (Loss) Earnings Per Common Share $ (0.10 ) $ 0.03 $ 4.17 $ 5.24 Diluted Earnings Per Common Share: Net (Loss) Income $ (1.4 ) $ 5.3 $ 227.9 $ 281.6 Less: Provision for preferred dividends 3.7 3.7 11.1 11.1 Income allocated to participating securities — 0.1 0.3 0.5 (Loss) Income Available to Common Shareholders $ (5.1 ) $ 1.5 $ 216.5 $ 270.0 Weighted Average Common Shares Outstanding (in millions) 52.2 51.6 51.9 51.6 Dilutive Effect of Restricted Stock and Restricted Stock Units (in millions)* 0.1 0.1 0.1 0.1 Weighted Average Diluted Common Shares (in millions) 52.3 51.7 52.0 51.7 Diluted (Loss) Earnings Per Common Share $ (0.10 ) $ 0.03 $ 4.16 $ 5.23 * Calculation excludes certain outstanding common shares (shown in millions by period at the right) attributable to stock units subject to performance or market conditions and restricted stock, which could have a dilutive effect in the future 0.1 0.1 0.2 0.1

Note 4 - Regulatory Matters (Ta

Note 4 - Regulatory Matters (Tables)	9 Months Ended
	Jun. 30, 2022
Notes Tables
Schedule of Regulatory Assets and Liabilities [Table Text Block]	June 30, September 30, June 30, Spire 2022 2021 2021 Regulatory Assets: Current: Pension and postretirement benefit costs $ — $ 31.1 $ 31.0 Unamortized purchased gas adjustments 123.4 243.5 0.5 Other 28.6 31.9 33.6 Total Current Regulatory Assets 152.0 306.5 65.1 Noncurrent: Pension and postretirement benefit costs 317.5 313.8 377.3 Cost of removal 471.9 431.9 449.1 Future income taxes due from customers 140.4 132.9 130.2 Energy efficiency 54.1 47.6 45.6 Unamortized purchased gas adjustments 97.4 — 43.9 Other 124.3 67.3 73.3 Total Noncurrent Regulatory Assets 1,205.6 993.5 1,119.4 Total Regulatory Assets $ 1,357.6 $ 1,300.0 $ 1,184.5 Regulatory Liabilities: Current: Pension and postretirement benefit costs $ — $ 5.8 $ 5.8 Unamortized purchased gas adjustments — 11.0 23.0 Other 3.2 17.8 18.0 Total Current Regulatory Liabilities 3.2 34.6 46.8 Noncurrent: Deferred taxes due to customers 148.7 127.5 130.4 Pension and postretirement benefit costs 185.0 159.3 176.7 Accrued cost of removal 40.7 36.2 29.1 Unamortized purchased gas adjustments — 284.3 42.2 Other 14.6 13.6 36.2 Total Noncurrent Regulatory Liabilities 389.0 620.9 414.6 Total Regulatory Liabilities $ 392.2 $ 655.5 $ 461.4 June 30, September 30, June 30, Spire Missouri 2022 2021 2021 Regulatory Assets: Current: Pension and postretirement benefit costs $ — $ 21.9 $ 21.9 Unamortized purchased gas adjustments 89.7 242.8 — Other 0.2 11.6 14.7 Total Current Regulatory Assets 89.9 276.3 36.6 Noncurrent: Future income taxes due from customers 131.8 124.2 121.5 Pension and postretirement benefit costs 238.5 226.0 287.3 Energy efficiency 54.1 47.6 45.6 Unamortized purchased gas adjustments 97.4 — 43.9 Cost of removal 34.9 34.9 29.4 Other 107.9 50.4 56.1 Total Noncurrent Regulatory Assets 664.6 483.1 583.8 Total Regulatory Assets $ 754.5 $ 759.4 $ 620.4 Regulatory Liabilities: Current: Pension and postretirement benefit costs $ — $ 3.6 $ 3.6 Unamortized purchased gas adjustments — — 9.0 Other — 13.5 14.5 Total Current Regulatory Liabilities — 17.1 27.1 Noncurrent: Deferred taxes due to customers 131.3 110.2 113.0 Pension and postretirement benefit costs 154.5 131.4 157.0 Accrued cost of removal 7.3 4.9 — Unamortized purchased gas adjustments — 284.3 42.2 Other 7.7 8.0 30.6 Total Noncurrent Regulatory Liabilities 300.8 538.8 342.8 Total Regulatory Liabilities $ 300.8 $ 555.9 $ 369.9 June 30, September 30, June 30, Spire Alabama 2022 2021 2021 Regulatory Assets: Current: Pension and postretirement benefit costs $ — $ 8.2 $ 8.2 Unamortized purchased gas adjustments 31.6 — — Other 21.3 10.6 8.9 Total Current Regulatory Assets 52.9 18.8 17.1 Noncurrent: Future income taxes due from customers 2.2 2.2 2.2 Pension and postretirement benefit costs 73.8 82.9 85.1 Cost of removal 437.0 397.0 419.7 Other 1.1 1.2 1.2 Total Noncurrent Regulatory Assets 514.1 483.3 508.2 Total Regulatory Assets $ 567.0 $ 502.1 $ 525.3 Regulatory Liabilities: Current: Pension and postretirement benefit costs $ — $ 2.2 $ 2.2 Unamortized purchased gas adjustments — 10.2 13.1 Other — 1.0 0.2 Total Current Regulatory Liabilities — 13.4 15.5 Noncurrent: Pension and postretirement benefit costs 20.4 19.8 13.9 Other 3.6 3.6 3.6 Total Noncurrent Regulatory Liabilities 24.0 23.4 17.5 Total Regulatory Liabilities $ 24.0 $ 36.8 $ 33.0
Schedule of Regulatory Assets Not Earning Return [Table Text Block]	June 30, September 30, June 30, 2022 2021 2021 Spire Pension and postretirement benefit costs $ 165.8 $ 165.7 $ 194.4 Future income taxes due from customers 138.2 130.7 128.0 Unamortized purchased gas adjustments 187.2 242.8 — Other 130.9 86.0 130.5 Total Regulatory Assets Not Earning a Return $ 622.1 $ 625.2 $ 452.9 Spire Missouri Pension and postretirement benefit costs $ 165.8 $ 165.7 $ 194.4 Future income taxes due from customers 131.8 124.2 121.5 Unamortized purchased gas adjustments 187.2 242.8 — Other 130.9 86.0 130.5 Total Regulatory Assets Not Earning a Return $ 615.7 $ 618.7 $ 446.4

Note 5 - Financing (Tables)

Note 5 - Financing (Tables)	9 Months Ended
	Jun. 30, 2022
Notes Tables
Schedule of Short-Term Debt [Table Text Block]	Spire (Parent Only) Spire Missouri Spire Alabama Spire CP Term Spire Spire Consol- Program Loan Note Note idated Nine Months Ended June 30, 2022 Highest borrowings outstanding $ 749.5 $ 250.0 $ 412.0 $ 199.9 $ 996.8 Lowest borrowings outstanding 408.0 — 43.2 38.4 462.5 Weighted average borrowings 565.3 151.1 217.7 128.2 716.4 Weighted average interest rate 0.6 % 0.8 % 0.6 % 0.7 % 0.6 % As of June 30, 2022 Borrowings outstanding $ 709.2 $ — $ 285.4 $ 196.3 $ 709.2 Weighted average interest rate 2.0 % n/a 2.0 % 2.0 % 2.0 % As of September 30, 2021 Borrowings outstanding $ 422.0 $ 250.0 $ 240.9 $ 49.0 $ 672.0 Weighted average interest rate 0.2 % 0.7 % 0.2 % 0.2 % 0.4 % As of June 30, 2021 Borrowings outstanding $ 211.0 $ 250.0 $ 217.5 $ — $ 461.0 Weighted average interest rate 0.2 % 0.7 % 0.2 % n/a 0.4 %
Summary Of Capitalized Interest [Table Text Block]	Three Months Ended June 30, Nine Months Ended June 30, 2022 2021 2022 2021 Spire $ 1.1 $ 1.1 $ 3.2 $ 3.1 Spire Missouri 0.2 — 0.3 0.1 Spire Alabama 0.9 0.8 2.5 2.1

Note 6 - Fair Value of Financ_2

Note 6 - Fair Value of Financial Instruments (Tables)	9 Months Ended
	Jun. 30, 2022
Notes Tables
Fair Value, by Balance Sheet Grouping [Table Text Block]	Classification of Estimated Fair Value Carrying Amount Fair Value Quoted Prices in Active Markets (Level 1) Significant Observable Inputs (Level 2) Spire As of June 30, 2022 Cash and cash equivalents $ 16.0 $ 16.0 $ 16.0 $ — Notes payable 709.2 709.2 — 709.2 Long-term debt, including current portion 3,239.1 3,032.1 — 3,032.1 As of September 30, 2021 Cash and cash equivalents $ 4.3 $ 4.3 $ 4.3 $ — Notes payable 672.0 672.0 — 672.0 Long-term debt, including current portion 2,994.9 3,375.9 — 3,375.9 As of June 30, 2021 Cash and cash equivalents $ 23.9 $ 23.9 $ 23.9 $ — Notes payable 461.0 461.0 — 461.0 Long-term debt, including current portion 3,049.8 3,440.2 — 3,440.2 Spire Missouri As of June 30, 2022 Cash and cash equivalents $ 7.0 $ 7.0 $ 7.0 $ — Notes payable – associated companies 285.4 285.4 — 285.4 Long-term debt 1,637.4 1,562.4 — 1,562.4 As of September 30, 2021 Notes payable $ 250.0 $ 250.0 $ — $ 250.0 Notes payable – associated companies 240.9 240.9 — 240.9 Long-term debt 1,338.4 1,540.4 — 1,540.4 As of June 30, 2021 Cash and cash equivalents $ 4.3 $ 4.3 $ 4.3 $ — Notes payable 250.0 250.0 — 250.0 Notes payable – associated companies 217.5 217.5 — 217.5 Long-term debt 1,338.6 1,548.8 — 1,548.8 Spire Alabama As of June 30, 2022 Cash and cash equivalents $ 3.7 $ 3.7 $ 3.7 $ — Notes payable – associated companies 196.3 196.3 — 196.3 Long-term debt, including current portion 571.4 527.2 — 527.2 As of September 30, 2021 Notes payable – associated companies $ 49.0 $ 49.0 $ — $ 49.0 Long-term debt 621.2 707.5 — 707.5 As of June 30, 2021 Cash and cash equivalents $ 9.5 $ 9.5 $ 9.5 $ — Long-term debt, including current portion 621.2 710.5 — 710.5

Note 7 - Fair Value Measureme_2

Note 7 - Fair Value Measurements (Tables)	9 Months Ended
	Jun. 30, 2022
Notes Tables
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	Quoted Prices in Active Markets (Level 1) Significant Observable Inputs (Level 2) Effects of Netting and Cash Margin Receivables /Payables Total As of June 30, 2022 ASSETS Gas Utility: U.S. stock/bond mutual funds $ 20.3 $ — $ — $ 20.3 NYMEX/ICE natural gas contracts 39.6 — (39.6 ) — Gas Marketing: NYMEX/ICE natural gas contracts — 94.2 (94.2 ) — Natural gas commodity contracts — 57.6 (5.3 ) 52.3 Other: U.S. stock/bond mutual funds 31.6 — — 31.6 Interest rate swaps 52.7 — (7.6 ) 45.1 Total $ 144.2 $ 151.8 $ (146.7 ) $ 149.3 LIABILITIES Gas Utility: NYMEX/ICE natural gas contracts $ 12.8 $ — $ (12.8 ) $ — Gas Marketing: NYMEX/ICE natural gas contracts — 60.8 (60.8 ) — Natural gas commodity contracts — 118.3 (5.3 ) 113.0 Other: Interest rate swaps 7.6 — (7.6 ) — Total $ 20.4 $ 179.1 $ (86.5 ) $ 113.0 Quoted Prices in Active Markets (Level 1) Significant Observable Inputs (Level 2) Effects of Netting and Cash Margin Receivables /Payables Total As of September 30, 2021 ASSETS Gas Utility: U.S. stock/bond mutual funds $ 23.8 $ — $ — $ 23.8 NYMEX/ICE natural gas contracts 104.0 — (104.0 ) — Gas Marketing: NYMEX/ICE natural gas contracts — 114.7 (93.7 ) 21.0 Natural gas commodity contracts — 35.2 (5.5 ) 29.7 Other: U.S. stock/bond mutual funds 26.2 — — 26.2 Interest rate swaps 12.6 — (5.2 ) 7.4 Total $ 166.6 $ 149.9 $ (208.4 ) $ 108.1 LIABILITIES Gas Utility: NYMEX/ICE natural gas contracts $ 0.3 $ — $ (0.3 ) $ — Gas Marketing: NYMEX/ICE natural gas contracts — 62.0 (62.0 ) — Natural gas commodity contracts — 96.7 (5.5 ) 91.2 Other: Interest rate swaps 5.7 — (5.2 ) 0.5 Total $ 6.0 $ 158.7 $ (73.0 ) $ 91.7 As of June 30, 2021 ASSETS Gas Utility: U.S. stock/bond mutual funds $ 24.3 $ — $ — $ 24.3 NYMEX/ICE natural gas contracts 25.3 — (25.3 ) — Gas Marketing: NYMEX/ICE natural gas contracts — 47.5 (47.5 ) — Natural gas commodity contracts — 20.2 — 20.2 Other: U.S. stock/bond mutual funds 21.5 — — 21.5 Interest rate swaps — 9.0 (5.5 ) 3.5 Total $ 71.1 $ 76.7 $ (78.3 ) $ 69.5 LIABILITIES Gas Marketing: NYMEX/ICE natural gas contracts $ — $ 18.8 $ (16.0 ) $ 2.8 Natural gas commodity contracts — 57.8 — 57.8 Other: Interest rate swaps — 6.7 (5.5 ) 1.2 Total $ — $ 83.3 $ (21.5 ) $ 61.8 Quoted Prices in Active Markets (Level 1) Significant Observable Inputs (Level 2) Effects of Netting and Cash Margin Receivables /Payables Total As of June 30, 2022 ASSETS U.S. stock/bond mutual funds $ 20.3 $ — $ — $ 20.3 NYMEX/ICE natural gas contracts 39.6 — (39.6 ) — Total $ 59.9 $ — $ (39.6 ) $ 20.3 LIABILITIES NYMEX/ICE natural gas contracts $ 12.8 $ — $ (12.8 ) $ — As of September 30, 2021 ASSETS U.S. stock/bond mutual funds $ 23.8 $ — $ — $ 23.8 NYMEX/ICE natural gas contracts 104.0 — (104.0 ) — Total $ 127.8 $ — $ (104.0 ) $ 23.8 LIABILITIES NYMEX/ICE natural gas contracts $ 0.3 $ — $ (0.3 ) $ — As of June 30, 2021 ASSETS U.S. stock/bond mutual funds $ 24.3 $ — $ — $ 24.3 NYMEX/ICE natural gas contracts 25.3 — (25.3 ) — Total $ 49.6 $ — $ (25.3 ) $ 24.3

Note 8 - Pension Plans and Ot_2

Note 8 - Pension Plans and Other Postretirement Benefits (Tables)	9 Months Ended
	Jun. 30, 2022
Notes Tables
Schedule of Net Benefit Costs [Table Text Block]	Three Months Ended June 30, Nine Months Ended June 30, 2022 2021 2022 2021 Spire Service cost – benefits earned during the period $ 4.8 $ 5.5 $ 15.6 $ 16.4 Interest cost on projected benefit obligation 5.4 5.5 15.8 15.3 Expected return on plan assets (7.7 ) (8.5 ) (24.1 ) (23.6 ) Amortization of prior service credit (1.1 ) (0.9 ) (3.4 ) (2.4 ) Amortization of actuarial loss 2.5 3.8 9.8 11.6 Loss on lump-sum settlements 17.8 11.2 29.5 15.0 Subtotal 21.7 16.6 43.2 32.3 Regulatory adjustment (6.9 ) 1.3 2.5 19.9 Net pension cost $ 14.8 $ 17.9 $ 45.7 $ 52.2 Spire Missouri Service cost – benefits earned during the period $ 3.5 $ 3.9 $ 11.2 $ 11.7 Interest cost on projected benefit obligation 3.8 3.5 10.9 10.5 Expected return on plan assets (5.7 ) (5.7 ) (17.6 ) (16.9 ) Amortization of prior service credit (0.5 ) (0.2 ) (1.5 ) (0.5 ) Amortization of actuarial loss 2.0 2.8 7.6 8.5 Loss on lump-sum settlements 17.3 9.1 24.1 9.1 Subtotal 20.4 13.4 34.7 22.4 Regulatory adjustment (8.3 ) (1.4 ) 1.3 13.7 Net pension cost $ 12.1 $ 12.0 $ 36.0 $ 36.1 Spire Alabama Service cost – benefits earned during the period $ 1.1 $ 1.3 $ 3.8 $ 4.2 Interest cost on projected benefit obligation 1.1 1.1 3.4 3.5 Expected return on plan assets (1.2 ) (1.4 ) (4.0 ) (4.5 ) Amortization of prior service credit (0.6 ) (0.6 ) (1.8 ) (1.8 ) Amortization of actuarial loss 0.5 1.0 2.2 3.1 Loss on lump-sum settlements 0.5 2.1 5.4 5.9 Subtotal 1.4 3.5 9.0 10.4 Regulatory adjustment 1.1 2.5 0.5 5.6 Net pension cost $ 2.5 $ 6.0 $ 9.5 $ 16.0 Three Months Ended June 30, Nine Months Ended June 30, 2022 2021 2022 2021 Spire Service cost – benefits earned during the period $ 1.9 $ 1.7 $ 5.8 $ 5.4 Interest cost on accumulated postretirement benefit obligation 1.6 1.4 4.6 4.4 Expected return on plan assets (4.3 ) (4.0 ) (12.8 ) (12.1 ) Amortization of prior service cost 0.3 0.3 0.8 0.8 Amortization of actuarial gain (0.5 ) (0.4 ) (1.7 ) (1.2 ) Subtotal (1.0 ) (1.0 ) (3.3 ) (2.7 ) Regulatory adjustment (0.1 ) 3.5 3.2 10.1 Net postretirement benefit (income) cost $ (1.1 ) $ 2.5 $ (0.1 ) $ 7.4 Spire Missouri Service cost – benefits earned during the period $ 1.6 $ 1.5 $ 4.8 $ 4.6 Interest cost on accumulated postretirement benefit obligation 1.2 1.1 3.4 3.3 Expected return on plan assets (2.9 ) (2.6 ) (8.6 ) (8.1 ) Amortization of prior service cost 0.2 0.2 0.6 0.6 Amortization of actuarial gain (0.5 ) (0.4 ) (1.5 ) (1.1 ) Subtotal (0.4 ) (0.2 ) (1.3 ) (0.7 ) Regulatory adjustment 0.4 3.8 4.5 11.3 Net postretirement benefit cost $ — $ 3.6 $ 3.2 $ 10.6 Spire Alabama Service cost – benefits earned during the period $ 0.3 $ 0.2 $ 0.9 $ 0.7 Interest cost on accumulated postretirement benefit obligation 0.4 0.3 1.1 1.0 Expected return on plan assets (1.3 ) (1.3 ) (3.9 ) (3.8 ) Amortization of prior service cost 0.1 0.1 0.2 0.2 Subtotal (0.5 ) (0.7 ) (1.7 ) (1.9 ) Regulatory adjustment (0.5 ) (0.4 ) (1.4 ) (1.3 ) Net postretirement benefit income $ (1.0 ) $ (1.1 ) $ (3.1 ) $ (3.2 )

Note 9 - Information by Opera_2

Note 9 - Information by Operating Segment (Tables)	9 Months Ended
	Jun. 30, 2022
Notes Tables
Schedule of Segment Reporting Information, by Segment [Table Text Block]	Gas Utility Gas Marketing Other Eliminations Consolidated Three Months Ended June 30, 2022 Operating Revenues: Revenues from external customers $ 377.4 $ 64.1 $ 6.5 $ — $ 448.0 Intersegment revenues — — 12.2 (12.2 ) — Total Operating Revenues 377.4 64.1 18.7 (12.2 ) 448.0 Operating Expenses: Natural gas 144.5 67.1 — (8.3 ) 203.3 Operation and maintenance 95.0 3.2 8.0 (3.9 ) 102.3 Depreciation and amortization 58.1 0.3 2.0 — 60.4 Taxes, other than income taxes 43.0 0.4 0.7 — 44.1 Total Operating Expenses 340.6 71.0 10.7 (12.2 ) 410.1 Operating Income (Loss) $ 36.8 $ (6.9 ) $ 8.0 $ — $ 37.9 Net Economic Earnings (Loss) $ 4.2 $ 0.4 $ (0.5 ) $ — $ 4.1 Gas Utility Gas Marketing Other Eliminations Consolidated Three Months Ended June 30, 2021 Operating Revenues: Revenues from external customers $ 306.7 $ 15.2 $ 5.9 $ — $ 327.8 Intersegment revenues — (0.1 ) 11.9 (11.8 ) — Total Operating Revenues 306.7 15.1 17.8 (11.8 ) 327.8 Operating Expenses: Natural gas 84.9 20.2 — (8.2 ) 96.9 Operation and maintenance 103.2 3.2 9.2 (3.6 ) 112.0 Depreciation and amortization 50.9 0.3 1.9 — 53.1 Taxes, other than income taxes 32.1 0.2 0.3 — 32.6 Total Operating Expenses 271.1 23.9 11.4 (11.8 ) 294.6 Operating Income (Loss) $ 35.6 $ (8.8 ) $ 6.4 $ — $ 33.2 Net Economic Earnings (Loss) $ 12.3 $ (5.2 ) $ (0.2 ) $ — $ 6.9 Gas Utility Gas Marketing Other Eliminations Consolidated Nine Months Ended June 30, 2022 Operating Revenues: Revenues from external customers $ 1,698.3 $ 171.4 $ 14.6 $ — $ 1,884.3 Intersegment revenues — — 38.8 (38.8 ) — Total Operating Revenues 1,698.3 171.4 53.4 (38.8 ) 1,884.3 Operating Expenses: Natural gas 710.7 160.9 — (27.1 ) 844.5 Operation and maintenance 306.5 9.1 28.0 (11.7 ) 331.9 Depreciation and amortization 169.2 1.0 6.0 — 176.2 Taxes, other than income taxes 150.3 0.8 2.2 — 153.3 Total Operating Expenses 1,336.7 171.8 36.2 (38.8 ) 1,505.9 Operating Income (Loss) $ 361.6 $ (0.4 ) $ 17.2 $ — $ 378.4 Net Economic Earnings (Loss) $ 240.6 $ 15.3 $ (8.2 ) $ — $ 247.7 Gas Utility Gas Marketing Other Eliminations Consolidated Nine Months Ended June 30, 2021 Operating Revenues: Revenues from external customers $ 1,856.9 $ 73.3 $ 15.1 $ — $ 1,945.3 Intersegment revenues 1.1 0.0 35.0 (36.1 ) — Total Operating Revenues 1,858.0 73.3 50.1 (36.1 ) 1,945.3 Operating Expenses: Natural gas 908.4 14.7 0.1 (26.0 ) 897.2 Operation and maintenance 310.2 13.6 28.9 (10.1 ) 342.6 Depreciation and amortization 149.0 0.9 5.5 — 155.4 Taxes, other than income taxes 124.0 0.9 1.7 — 126.6 Total Operating Expenses 1,491.6 30.1 36.2 (36.1 ) 1,521.8 Operating Income $ 366.4 $ 43.2 $ 13.9 $ — $ 423.5 Net Economic Earnings (Loss) $ 248.4 $ 37.9 $ (6.9 ) $ — $ 279.4
Reconciliation Of Consolidated Net Economic Earnings To Consolidated Net Income [Table Text Block]	Three Months Ended June 30, Nine Months Ended June 30, 2022 2021 2022 2021 Net Income $ (1.4 ) $ 5.3 $ 227.9 $ 281.6 Adjustments, pre-tax: Missouri regulatory adjustment — — — (9.0 ) Fair value and timing adjustments 7.3 2.1 20.9 6.2 Income tax adjustments (1.8 ) (0.5 ) (1.1 ) 0.6 Net Economic Earnings $ 4.1 $ 6.9 $ 247.7 $ 279.4
Reconciliation of Assets from Segment to Consolidated [Table Text Block]	June 30, September 30, June 30, 2022 2021 2021 Total Assets: Gas Utility $ 7,854.7 $ 7,615.4 $ 7,302.4 Gas Marketing 595.5 466.1 349.2 Other 2,652.9 2,351.7 2,256.3 Eliminations (1,319.2 ) (1,076.8 ) (1,014.6 ) Total Assets $ 9,783.9 $ 9,356.4 $ 8,893.3

Note 1 - Summary of Significa_3

Note 1 - Summary of Significant Accounting Policies (Details Textual) $ in Millions	9 Months Ended
	Jun. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)
Number of Reportable Segments	2
Restricted Cash, Total	$ 14.1	$ 7

Note 1 - Summary of Significa_4

Note 1 - Summary of Significant Accounting Policies - Transactions With Affiliates (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Spire Missouri [Member] | Spire Marketing Incorporation [Member]
Purchases of natural gas from Spire Marketing Inc.	$ 26.2	$ 9.2	$ 62.3	$ 77.5
Sales of natural gas to Spire Marketing Inc.	0	0	0	1.1
Spire Missouri [Member] | Spire S T L Pipeline L L C [Member]
Transportation services received	8	7.9	23.9	23.9
Spire Missouri [Member] | Spire N G L Inc [Member]
Transportation services received	0	0	0	0.5
Spire Alabama Inc [Member] | Spire Marketing Incorporation [Member]
Purchases of natural gas from Spire Marketing Inc.	3.2	0	3.2	10.6
Sales of natural gas to Spire Marketing Inc.	$ 0	$ 0	$ 0	$ 0.1

Note 1 - Summary of Significa_5

Note 1 - Summary of Significant Accounting Policies - Accrued Capital Expenditures Excluded From Capital Expenditures in the Statements of Cash Flows (Details) - USD ($) $ in Millions	9 Months Ended		12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Sep. 30, 2021
Accrued capital expenditures	$ 52.6	$ 41.5	$ 59.5
Spire Missouri [Member]
Accrued capital expenditures	39.2	27.6	37.1
Spire Alabama Inc [Member]
Accrued capital expenditures	$ 7.7	$ 6.7	$ 13.6

Note 1 - Summary of Significa_6

Note 1 - Summary of Significant Accounting Policies - Activity in the Allowance for Credit Losses (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Allowance at beginning of period	$ 35.1	$ 34.4	$ 30.3	$ 24.9
Provision for expected credit losses	1.9	1.9	8.6	12.6
Write-offs, net of recoveries	(4.4)	(1.8)	(6.3)	(3)
Allowance at end of period	32.6	34.5	32.6	34.5
Spire Missouri [Member]
Allowance at beginning of period	27	26.6	22.6	18.1
Provision for expected credit losses	1.8	1.8	8.6	10.8
Write-offs, net of recoveries	(3.7)	(1)	(6.1)	(1.5)
Allowance at end of period	25.1	27.4	25.1	27.4
Spire Alabama Inc [Member]
Allowance at beginning of period	7.1	6.5	6.6	5.5
Provision for expected credit losses	0	0.1	0	1.4
Write-offs, net of recoveries	(0.5)	(0.6)	0	(0.9)
Allowance at end of period	$ 6.6	$ 6	$ 6.6	$ 6

Note 2 - Revenue (Details Textu

Note 2 - Revenue (Details Textual) - USD ($) $ in Millions	9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Commercial and Industrial [Member]
Revenue, Reduction Amount	$ 150
Off-system and Other Inventive [Member]
Revenue, Adjustment Amount		$ 25

Note 2 - Revenue - Disaggregate

Note 2 - Revenue - Disaggregated of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Operating Revenues	$ 448	$ 327.8	$ 1,884.3	$ 1,945.3
Consolidation, Eliminations [Member]
Operating Revenues	(12.2)		(38.8)	(36.1)
Segment Reconciling Items [Member]
Operating Revenues		(11.8)
Gas Utility [Member] | Operating Segments [Member]
Operating Revenues	377.4	306.7	1,698.3	1,858
Gas Marketing [Member] | Operating Segments [Member]
Operating Revenues	64.1	15.1	171.4	73.3
Other Segments [Member] | Operating Segments [Member]
Operating Revenues	18.7	17.8	53.4	50.1
Spire Missouri [Member]
Operating Revenues	236.7	192.1	1,155.8	1,338.5
Spire Missouri [Member] | Gas Utility [Member] | Operating Segments [Member]
Revenue	237.8	193.3	1,143.1	1,335.8
Changes in accrued revenue under alternative revenue programs	(1.1)	(1.2)	12.7	2.7
Spire Missouri [Member] | Gas Utility [Member] | Operating Segments [Member] | Residential [Member]
Revenue	171.1	144.4	947.3	772.8
Spire Missouri [Member] | Gas Utility [Member] | Operating Segments [Member] | Commercial and Industrial [Member]
Revenue	51.9	35	140	408.9
Spire Missouri [Member] | Gas Utility [Member] | Operating Segments [Member] | Transportation [Member]
Revenue	7.1	7.4	26.4	26.3
Spire Missouri [Member] | Gas Utility [Member] | Operating Segments [Member] | Off-system and Other Inventive [Member]
Revenue	4.5	4.5	20.3	140.4
Spire Missouri [Member] | Gas Utility [Member] | Operating Segments [Member] | Other Customer Revenue [Member]
Revenue	3.2	2	9.1	(12.6)
Spire Alabama Inc [Member]
Operating Revenues	115.7	93.3	446.4	429.5
Spire Alabama Inc [Member] | Gas Utility [Member] | Operating Segments [Member]
Revenue	104.7	89.6	436.1	429.2
Changes in accrued revenue under alternative revenue programs	11	3.7	10.3	0.3
Spire Alabama Inc [Member] | Gas Utility [Member] | Operating Segments [Member] | Residential [Member]
Revenue	56.2	45.6	266.2	259.6
Spire Alabama Inc [Member] | Gas Utility [Member] | Operating Segments [Member] | Commercial and Industrial [Member]
Revenue	24	21.3	101.6	98.8
Spire Alabama Inc [Member] | Gas Utility [Member] | Operating Segments [Member] | Transportation [Member]
Revenue	17.4	18.7	57.5	60.9
Spire Alabama Inc [Member] | Gas Utility [Member] | Operating Segments [Member] | Off-system and Other Inventive [Member]
Revenue	5.6	2.8	6.6	6.7
Spire Alabama Inc [Member] | Gas Utility [Member] | Operating Segments [Member] | Other Customer Revenue [Member]
Revenue	1.5	1.2	4.2	3.2
Spire [Member]
Operating Revenues	448	327.8	1,884.3	1,945.3
Spire [Member] | Operating Segments [Member]
Operating Revenues	460.2	339.6	1,923.1	1,981.4
Spire [Member] | Consolidation, Eliminations [Member]
Operating Revenues	(12.2)		(38.8)	(36.1)
Spire [Member] | Segment Reconciling Items [Member]
Operating Revenues		(11.8)
Spire [Member] | Gas Utility [Member] | Operating Segments [Member]
Revenue	368.3	303.8	1,678.6	1,860.1
Changes in accrued revenue under alternative revenue programs	9.1	2.9	19.7	(2.1)
Total Gas Utility operating revenues	377.4	306.7	1,698.3	1,858
Spire [Member] | Gas Utility [Member] | Operating Segments [Member] | Residential [Member]
Revenue	239.5	200.4	1,268.8	1,087.9
Spire [Member] | Gas Utility [Member] | Operating Segments [Member] | Commercial and Industrial [Member]
Revenue	86.2	63.6	275.6	535.8
Spire [Member] | Gas Utility [Member] | Operating Segments [Member] | Transportation [Member]
Revenue	26.9	28.7	91.6	95.1
Spire [Member] | Gas Utility [Member] | Operating Segments [Member] | Off-system and Other Inventive [Member]
Revenue	10.1	7.2	26.9	147.1
Spire [Member] | Gas Utility [Member] | Operating Segments [Member] | Other Customer Revenue [Member]
Revenue	5.6	3.9	15.7	(5.8)
Spire [Member] | Gas Marketing [Member] | Operating Segments [Member]
Unregulated Operating Revenue	64.1	15.1	171.4	73.3
Spire [Member] | Other Segments [Member] | Operating Segments [Member]
Unregulated Operating Revenue	$ 18.7	$ 17.8	$ 53.4	$ 50.1

Note 2 - Revenue - Taxes Associ

Note 2 - Revenue - Taxes Associated With Natural Gas Utility Services (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Gross Receipts Tax Amounts	$ 23.3	$ 17.9	$ 97.1	$ 81.8
Spire Missouri [Member]
Gross Receipts Tax Amounts	16.7	12.3	70.6	56.1
Spire Alabama Inc [Member]
Gross Receipts Tax Amounts	$ 5.5	$ 4.7	$ 22.5	$ 21.8

Note 3 - Earnings Per Common _3

Note 3 - Earnings Per Common Share - Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended		9 Months Ended
		Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Net Income		$ (1.4)	$ 5.3	$ 227.9	$ 281.6
Provision for preferred dividends		3.7	3.7	11.1	11.1
Income allocated to participating securities		0	0.1	0.3	0.5
Net (Loss) Income Available to Common Shareholders		$ (5.1)	$ 1.5	$ 216.5	$ 270
Basic (in shares)		52.2	51.6	51.9	51.6
Basic (Loss) Earnings Per Common Share (in dollars per share)		$ (0.10)	$ 0.03	$ 4.17	$ 5.24
Dilutive Effect of Restricted Stock and Restricted Stock Units (in millions)* (in shares)	[1]	0.1	0.1	0.1	0.1
Weighted Average Diluted Common Shares (in millions) (in shares)		52.3	51.7	52	51.7
Diluted (Loss) Earnings Per Common Share (in dollars per share)		$ (0.10)	$ 0.03	$ 4.16	$ 5.23
* Calculation excludes certain outstanding common shares (shown in millions by period at the right) attributable to stock units subject to performance or market conditions and restricted stock, which could have a dilutive effect in the future (in shares)		0.1	0.1	0.2	0.1
[1]Calculation excludes certain outstanding common shares (shown in millions by period at the right) attributable to stock units subject to performance or market conditions and restricted stock, which could have a dilutive effect in the future

Note 4 - Regulatory Matters (De

Note 4 - Regulatory Matters (Details Textual) - USD ($) $ in Millions

1 Months Ended

3 Months Ended

6 Months Ended

7 Months Ended

9 Months Ended

Apr. 21, 2022

Jan. 18, 2022

Jan. 03, 2022

Dec. 23, 2021

Aug. 23, 2021

Oct. 31, 2021

Feb. 28, 2021

Jun. 30, 2022

Mar. 31, 2022

Dec. 31, 2021

Jun. 30, 2021

Jun. 30, 2022

Dec. 31, 2021

Jun. 30, 2022

Jun. 30, 2021

Jul. 22, 2022

Jul. 12, 2022

Jul. 11, 2022

Dec. 22, 2021

Utilities Operating Expense, Gas and Petroleum Purchased

$ 203.3

$ 96.9

$ 844.5

$ 897.2

Spire S T L Pipeline L L C [Member]

Asset Impairment Charges, Total

$ 270

Revolving Credit Facility [Member] | Subsequent Event [Member]

Line of Credit Facility, Maximum Borrowing Capacity

$ 1,300

Missouri Public Service Commission [Member] | Infrastructure System Replacement Surcharge [Member]

Public Utilities, Requested Rate Increase (Decrease), Amount

$ 47.3

Spire Missouri [Member]

Utilities Operating Expense, Gas and Petroleum Purchased

$ 195.8

94.7

55.6

538.8

754.6

Public Utilities, Reduced Revenue Accounts Receivable Cost Of Gas and Regulatory Liabilities

$ 150

Equity and Debt Financing, Authority Pending Approval

$ 800

Spire Missouri [Member] | Revolving Credit Facility [Member] | Subsequent Event [Member]

Line of Credit Facility, Maximum Borrowing Capacity

575

Spire Missouri [Member] | Infrastructure System Replacement Surcharge [Member]

Regulated Operating Revenue, Pipelines

$ 11.9

$ 11.3

Spire Missouri [Member] | Missouri Public Service Commission [Member]

Public Utilities, Approved Rate Increase (Decrease), Amount

72.2

Public Utilities, Requested Rate Increase (Decrease), Amount

$ 24.9

Public Utilities, Deferred Amount Under Order Authorizing Accounting Treatment

30.4

30.4

30.4

Deferred Amount in Accordance With New Capitalization Rates

12.5

12.5

12.5

Public Utilities, Deferred Amount Prudent Costs in Excess of Capitalization Rates

12.9

12.9

12.9

Deferred Amount, Prudent Costs Related To I S R S Settlement

5

$ 5

5

Public Utilities, Requested Rate Increase (Decrease), Amended, Amount

151.9

Regulated Incremental Annual Revenue From Settlement

$ 8.5

Spire Alabama Inc [Member]

Utilities Operating Expense, Gas and Petroleum Purchased

$ 41

$ 24.1

$ 138.6

$ 129

Spire Alabama Inc [Member] | Subsequent Event [Member] | Maximum [Member] | Spire [Member]

Notes Receivable, Related Parties

$ 25

Spire Alabama Inc [Member] | Revolving Credit Facility [Member] | Subsequent Event [Member]

Line of Credit Facility, Maximum Borrowing Capacity

$ 275

Spire Alabama Inc [Member] | Revolving Credit Facility [Member] | Subsequent Event [Member] | Spire [Member]

Line of Credit Facility, Maximum Borrowing Capacity

$ 275

$ 200

Spire Gulf [Member]

Public Utilities, Approved Return on Equity, Percentage

9.95%

Public Utilities, Approved Rate, Increase Decrease Annualized Revenue

$ 1

Spire Mississippi [Member]

Public Utilities, Approved Rate, Increase Decrease Annualized Revenue

$ 0.8

$ 1.1

Future Income Taxes Due From Customers and Pension and Other Postretirement Benefit Costs [Member]

Remaining Recovery Period of Regulatory Assets for which No Return on Investment During Recovery Period is Provided (Year)

20 years

PGA Assets [Member]

Remaining Recovery Period of Regulatory Assets for which No Return on Investment During Recovery Period is Provided (Year)

1 year

PGA Assets Due to Filing Adjustment Factors [Member]

Remaining Recovery Period of Regulatory Assets for which No Return on Investment During Recovery Period is Provided (Year)

3 years

PGA Assets Not Earning A Return [Member]

Remaining Recovery Period of Regulatory Assets for which No Return on Investment During Recovery Period is Provided (Year)

15 years

Note 4 - Regulatory Matters - R

Note 4 - Regulatory Matters - Regulatory Assets and Liabilities (Details) - USD ($) $ in Millions	Jun. 30, 2022	Sep. 30, 2021	Jun. 30, 2021
Regulatory assets	$ 152	$ 306.5	$ 65.1
Regulatory Assets Noncurrent	1,205.6	993.5	1,119.4
Total Regulatory Assets	1,357.6	1,300	1,184.5
Regulatory liabilities	3.2	34.6	46.8
Regulatory Liability Noncurrent	389	620.9	414.6
Total Regulatory Liabilities	392.2	655.5	461.4
Spire Missouri [Member]
Regulatory assets	89.9	276.3	36.6
Regulatory Assets Noncurrent	664.6	483.1	583.8
Total Regulatory Assets	754.5	759.4	620.4
Regulatory liabilities	0	17.1	27.1
Regulatory Liability Noncurrent	300.8	538.8	342.8
Total Regulatory Liabilities	300.8	555.9	369.9
Spire Alabama Inc [Member]
Regulatory assets	52.9	18.8	17.1
Regulatory Assets Noncurrent	514.1	483.3	508.2
Total Regulatory Assets	567	502.1	525.3
Regulatory liabilities	0	13.4	15.5
Regulatory Liability Noncurrent	24	23.4	17.5
Total Regulatory Liabilities	24	36.8	33
Pension and Other Postretirement Plans Costs [Member]
Regulatory assets	0	31.1	31
Regulatory Assets Noncurrent	317.5	313.8	377.3
Regulatory liabilities	0	5.8	5.8
Regulatory Liability Noncurrent	185	159.3	176.7
Pension and Other Postretirement Plans Costs [Member] | Spire Missouri [Member]
Regulatory assets	0	21.9	21.9
Regulatory Assets Noncurrent	238.5	226	287.3
Regulatory liabilities	0	3.6	3.6
Regulatory Liability Noncurrent	154.5	131.4	157
Pension and Other Postretirement Plans Costs [Member] | Spire Alabama Inc [Member]
Regulatory assets	0	8.2	8.2
Regulatory Assets Noncurrent	73.8	82.9	85.1
Regulatory liabilities	0	2.2	2.2
Regulatory Liability Noncurrent	20.4	19.8	13.9
Unamortized Purchased Gas Adjustments Asset [Member]
Regulatory assets	123.4	243.5	0.5
Regulatory Assets Noncurrent	97.4	0	43.9
Regulatory liabilities	0	11	23
Regulatory Liability Noncurrent	0	284.3	42.2
Unamortized Purchased Gas Adjustments Asset [Member] | Spire Missouri [Member]
Regulatory assets	89.7	242.8	0
Regulatory Assets Noncurrent	97.4	0	43.9
Regulatory liabilities	0	0	9
Regulatory Liability Noncurrent	0	284.3	42.2
Unamortized Purchased Gas Adjustments Asset [Member] | Spire Alabama Inc [Member]
Regulatory assets	31.6	0	0
Regulatory Assets Noncurrent	0	10.2	13.1
Other Regulatory Assets (Liabilities) [Member]
Regulatory assets	28.6	31.9	33.6
Regulatory Assets Noncurrent	124.3	67.3	73.3
Regulatory liabilities	3.2	17.8	18
Regulatory Liability Noncurrent	14.6	13.6	36.2
Other Regulatory Assets (Liabilities) [Member] | Spire Missouri [Member]
Regulatory assets	0.2	11.6	14.7
Regulatory Assets Noncurrent	107.9	50.4	56.1
Regulatory liabilities	0	13.5	14.5
Regulatory Liability Noncurrent	7.7	8	30.6
Other Regulatory Assets (Liabilities) [Member] | Spire Alabama Inc [Member]
Regulatory assets	21.3	10.6	8.9
Regulatory Assets Noncurrent	1.1	1.2	1.2
Regulatory liabilities	0	1	0.2
Regulatory Liability Noncurrent	3.6	3.6	3.6
Deferred Income Tax Charge [Member]
Regulatory Assets Noncurrent	140.4	132.9	130.2
Deferred Income Tax Charge [Member] | Spire Missouri [Member]
Regulatory Assets Noncurrent	131.8	124.2	121.5
Deferred Income Tax Charge [Member] | Spire Alabama Inc [Member]
Regulatory Assets Noncurrent	2.2	2.2	2.2
Removal Costs [Member]
Regulatory Assets Noncurrent	471.9	431.9	449.1
Regulatory Liability Noncurrent	40.7	36.2	29.1
Removal Costs [Member] | Spire Missouri [Member]
Regulatory Assets Noncurrent	34.9	34.9	29.4
Regulatory Liability Noncurrent	7.3	4.9	0
Removal Costs [Member] | Spire Alabama Inc [Member]
Regulatory Assets Noncurrent	437	397	419.7
Renewable Energy Program [Member]
Regulatory Assets Noncurrent	54.1	47.6	45.6
Renewable Energy Program [Member] | Spire Missouri [Member]
Regulatory Assets Noncurrent	54.1	47.6	45.6
Estimated Deferred Taxes Due to Customers [Member]
Regulatory Liability Noncurrent	148.7	127.5	130.4
Estimated Deferred Taxes Due to Customers [Member] | Spire Missouri [Member]
Regulatory Liability Noncurrent	$ 131.3	$ 110.2	$ 113

Note 4 - Regulatory Matters -_2

Note 4 - Regulatory Matters - Regulatory Assets Not Earning a Return (Details) - USD ($) $ in Millions	Jun. 30, 2022	Sep. 30, 2021	Jun. 30, 2021
Regulatory assets not earning a return	$ 622.1	$ 625.2	$ 452.9
Spire Missouri [Member]
Regulatory assets not earning a return	615.7	618.7	446.4
Pension and Other Postretirement Plans Costs [Member]
Regulatory assets not earning a return	165.8	165.7	194.4
Pension and Other Postretirement Plans Costs [Member] | Spire Missouri [Member]
Regulatory assets not earning a return	165.8	165.7	194.4
Deferred Income Tax Charge [Member]
Regulatory assets not earning a return	138.2	130.7	128
Deferred Income Tax Charge [Member] | Spire Missouri [Member]
Regulatory assets not earning a return	131.8	124.2	121.5
Unamortized Purchased Gas Adjustments Asset [Member]
Regulatory assets not earning a return	187.2	242.8	0
Unamortized Purchased Gas Adjustments Asset [Member] | Spire Missouri [Member]
Regulatory assets not earning a return	187.2	242.8	0
Other Regulatory Assets (Liabilities) [Member]
Regulatory assets not earning a return	130.9	86	130.5
Other Regulatory Assets (Liabilities) [Member] | Spire Missouri [Member]
Regulatory assets not earning a return	$ 130.9	$ 86	$ 130.5

Note 5 - Financing (Details Tex

Note 5 - Financing (Details Textual) - USD ($) $ in Thousands		1 Months Ended
	Dec. 07, 2021	Mar. 31, 2021	Jul. 22, 2022	Jun. 30, 2022
Commercial Paper [Member] | Parent Company [Member]
Short Term Borrowings Used to Support Lending to Utilities				$ 545,200
Spire Missouri [Member] | First Mortgage Bonds Due December Two Two Thousand Twenty Four [Member]
Long-Term Debt, Gross	$ 300,000
Debt Instrument, Interest Rate, Stated Percentage	8%
Spire Missouri [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | First Mortgage Bonds Due December Two Two Thousand Twenty Four [Member]
Debt Instrument, Basis Spread on Variable Rate	0.50%
Spire Missouri [Member] | Unsecured Term Loan [Member]
Debt Instrument, Face Amount		$ 250,000
Debt Instrument, Term (Day)		364 days
Spire Missouri [Member] | Unsecured Term Loan [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate		0.65%
Revolving Credit Facility [Member]
Line of Credit Facility, Covenant, Percentage of Total Capitalization				60%
Long-Term Line of Credit, Total				$ 0
Revolving Credit Facility [Member] | Maximum [Member]
Line of Credit Facility, Covenant, Percentage of Total Capitalization				70%
Subsequent Event [Member] | Commercial Paper [Member]
Short-term Borrowing, Maximum Aggregate Principal Amount			$ 1,300,000
Subsequent Event [Member] | Revolving Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity			1,300,000
Subsequent Event [Member] | Revolving Credit Facility [Member] | Spire [Member]
Line of Credit Facility, Maximum Borrowing Capacity			450,000
Subsequent Event [Member] | Revolving Credit Facility [Member] | Spire Missouri [Member]
Line of Credit Facility, Maximum Borrowing Capacity			575,000
Subsequent Event [Member] | Revolving Credit Facility [Member] | Spire Alabama Inc [Member]
Line of Credit Facility, Maximum Borrowing Capacity			$ 275,000

Note 5 - Financing - Short-term

Note 5 - Financing - Short-term Borrowings (Details) - USD ($) $ in Millions	9 Months Ended
	Jun. 30, 2022	Sep. 30, 2021	Jun. 30, 2021
Highest borrowings outstanding	$ 996.8
Lowest borrowings outstanding	462.5
Weighted average borrowings	$ 716.4
Weighted average interest rate	0.60%
Borrowings outstanding	$ 709.2	$ 672	$ 461
Weighted average interest rate	2%	0.40%	0.40%
Spire Missouri [Member] | Term Loan [Member]
Highest borrowings outstanding	$ 250
Lowest borrowings outstanding	0
Weighted average borrowings	$ 151.1
Weighted average interest rate	0.80%
Borrowings outstanding	$ 0	$ 250	$ 250
Weighted average interest rate		0.70%	0.70%
Spire Missouri [Member] | Spire Note [Member]
Highest borrowings outstanding	412
Lowest borrowings outstanding	43.2
Weighted average borrowings	$ 217.7
Weighted average interest rate	0.60%
Borrowings outstanding	$ 285.4	$ 240.9	$ 217.5
Weighted average interest rate	2%	0.20%	0.20%
Spire Alabama Inc [Member] | Spire Note [Member]
Highest borrowings outstanding	$ 199.9
Lowest borrowings outstanding	38.4
Weighted average borrowings	$ 128.2
Weighted average interest rate	0.70%
Borrowings outstanding	$ 196.3	$ 49	$ 0
Weighted average interest rate	2%	0.20%
Commercial Paper [Member] | Parent Company [Member]
Highest borrowings outstanding	$ 749.5
Lowest borrowings outstanding	408
Weighted average borrowings	$ 565.3
Weighted average interest rate	0.60%
Borrowings outstanding	$ 709.2	$ 422	$ 211
Weighted average interest rate	2%	0.20%	0.20%

Note 5 - Financing - Capitalize

Note 5 - Financing - Capitalized Interest Expense (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Interest Paid Capitalized	$ 1.1	$ 1.1	$ 3.2	$ 3.1
Spire Missouri [Member]
Interest Paid Capitalized	0.2	0	0.3	0.1
Spire Alabama Inc [Member]
Interest Paid Capitalized	$ 0.9	$ 0.8	$ 2.5	$ 2.1

Note 6 - Fair Value of Financ_3

Note 6 - Fair Value of Financial Instruments - Estimated Fair Value of Financial Instruments Not Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Millions	Jun. 30, 2022	Sep. 30, 2021	Jun. 30, 2021
Reported Value Measurement [Member]
Cash and cash equivalents	$ 16	$ 4.3	$ 23.9
Notes payable	709.2	672	461
Long-term debt, including current portion	3,239.1	2,994.9	3,049.8
Reported Value Measurement [Member] | Spire Missouri [Member]
Cash and cash equivalents	7		4.3
Notes payable		250	250
Long-term debt, including current portion	1,637.4	1,338.4	1,338.6
Notes payable – associated companies	285.4	240.9	217.5
Reported Value Measurement [Member] | Spire Alabama Inc [Member]
Cash and cash equivalents	3.7		9.5
Long-term debt, including current portion	571.4	621.2	621.2
Notes payable – associated companies	196.3	49
Estimate of Fair Value Measurement [Member]
Cash and cash equivalents	16	4.3	23.9
Notes payable	709.2	672	461
Long-term debt, including current portion	3,032.1	3,375.9	3,440.2
Estimate of Fair Value Measurement [Member] | Spire Missouri [Member]
Cash and cash equivalents	7		4.3
Notes payable		250	250
Long-term debt, including current portion	1,562.4	1,540.4	1,548.8
Notes payable – associated companies	285.4	240.9	217.5
Estimate of Fair Value Measurement [Member] | Spire Alabama Inc [Member]
Cash and cash equivalents	3.7		9.5
Long-term debt, including current portion	527.2	707.5	710.5
Notes payable – associated companies	196.3	49
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]
Cash and cash equivalents	16	4.3	23.9
Notes payable	0	0	0
Long-term debt, including current portion	0	0	0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] | Spire Missouri [Member]
Cash and cash equivalents	7		4.3
Notes payable		0	0
Long-term debt, including current portion	0	0	0
Notes payable – associated companies	0	0	0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] | Spire Alabama Inc [Member]
Cash and cash equivalents	3.7		9.5
Long-term debt, including current portion	0	0	0
Notes payable – associated companies	0	0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
Cash and cash equivalents	0	0	0
Notes payable	709.2	672	461
Long-term debt, including current portion	3,032.1	3,375.9	3,440.2
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Spire Missouri [Member]
Cash and cash equivalents	0		0
Notes payable		250	250
Long-term debt, including current portion	1,562.4	1,540.4	1,548.8
Notes payable – associated companies	285.4	240.9	217.5
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Spire Alabama Inc [Member]
Cash and cash equivalents	0		0
Long-term debt, including current portion	527.2	707.5	$ 710.5
Notes payable – associated companies	$ 196.3	$ 49

Note 7 - Fair Value Measureme_3

Note 7 - Fair Value Measurements - Schedule of Derivative Assets and Liabilities, Including Receivables and Payables (Details) - Fair Value, Recurring [Member] - USD ($) $ in Millions	Jun. 30, 2022	Sep. 30, 2021	Jun. 30, 2021
Effects of netting, asset	$ (146.7)	$ (208.4)	$ (78.3)
Derivative Assets	149.3	108.1	69.5
Effects of netting, liability	(86.5)	(73)	(21.5)
Derivative Liabilities	113	91.7	61.8
Fair Value, Inputs, Level 1 [Member]
Derivative Asset Fair Value Gross Asset	144.2	166.6	71.1
Derivative Liability Fair Value Gross Liability	20.4	6	0
Fair Value, Inputs, Level 2 [Member]
Derivative Asset Fair Value Gross Asset	151.8	149.9	76.7
Derivative Liability Fair Value Gross Liability	179.1	158.7	83.3
Spire Missouri [Member]
Effects of netting, asset	(39.6)	(104)	(25.3)
Derivative Assets	20.3	23.8	24.3
Spire Missouri [Member] | Fair Value, Inputs, Level 1 [Member]
Derivative Asset Fair Value Gross Asset	59.9	127.8	49.6
Spire Missouri [Member] | Fair Value, Inputs, Level 2 [Member]
Derivative Asset Fair Value Gross Asset	0	0	0
U S Stock And Bond Mutual Funds [Member] | Gas Utility [Member]
Effects of netting, asset	0	0	0
Derivative Assets	20.3	23.8	24.3
U S Stock And Bond Mutual Funds [Member] | Other Segments [Member]
Effects of netting, asset	0	0	0
Derivative Assets	31.6	26.2	21.5
U S Stock And Bond Mutual Funds [Member] | Fair Value, Inputs, Level 1 [Member] | Gas Utility [Member]
Derivative Asset Fair Value Gross Asset	20.3	23.8	24.3
U S Stock And Bond Mutual Funds [Member] | Fair Value, Inputs, Level 1 [Member] | Other Segments [Member]
Derivative Asset Fair Value Gross Asset	31.6	26.2	21.5
U S Stock And Bond Mutual Funds [Member] | Fair Value, Inputs, Level 2 [Member] | Gas Utility [Member]
Derivative Asset Fair Value Gross Asset	0	0	0
U S Stock And Bond Mutual Funds [Member] | Fair Value, Inputs, Level 2 [Member] | Other Segments [Member]
Derivative Asset Fair Value Gross Asset	0	0	0
U S Stock And Bond Mutual Funds [Member] | Spire Missouri [Member]
Effects of netting, asset	0	0	0
Derivative Assets	20.3	23.8	24.3
U S Stock And Bond Mutual Funds [Member] | Spire Missouri [Member] | Fair Value, Inputs, Level 1 [Member]
Derivative Asset Fair Value Gross Asset	20.3	23.8	24.3
U S Stock And Bond Mutual Funds [Member] | Spire Missouri [Member] | Fair Value, Inputs, Level 2 [Member]
Derivative Asset Fair Value Gross Asset	0	0	0
N Y M E X I C E Natural Gas Contracts [Member] | Gas Utility [Member]
Effects of netting, asset	(39.6)	(104)	(25.3)
Derivative Assets	0	0	0
Effects of netting, liability	(12.8)	(0.3)	(16)
Derivative Liabilities	0	0	2.8
N Y M E X I C E Natural Gas Contracts [Member] | Gas Marketing [Member]
Effects of netting, asset	(94.2)	(93.7)	(47.5)
Derivative Assets	0	21	0
Effects of netting, liability	(60.8)	(62)
Derivative Liabilities	0	0
N Y M E X I C E Natural Gas Contracts [Member] | Fair Value, Inputs, Level 1 [Member] | Gas Utility [Member]
Derivative Asset Fair Value Gross Asset	39.6	104	25.3
Derivative Liability Fair Value Gross Liability	12.8	0.3	0
N Y M E X I C E Natural Gas Contracts [Member] | Fair Value, Inputs, Level 1 [Member] | Gas Marketing [Member]
Derivative Asset Fair Value Gross Asset	0	0	0
Derivative Liability Fair Value Gross Liability	0	0
N Y M E X I C E Natural Gas Contracts [Member] | Fair Value, Inputs, Level 2 [Member] | Gas Utility [Member]
Derivative Asset Fair Value Gross Asset	0	0	0
Derivative Liability Fair Value Gross Liability	0	0	18.8
N Y M E X I C E Natural Gas Contracts [Member] | Fair Value, Inputs, Level 2 [Member] | Gas Marketing [Member]
Derivative Asset Fair Value Gross Asset	94.2	114.7	47.5
Derivative Liability Fair Value Gross Liability	60.8	62
N Y M E X I C E Natural Gas Contracts [Member] | Spire Missouri [Member]
Effects of netting, asset	(39.6)	(104)	(25.3)
Derivative Assets	0	0	0
Effects of netting, liability	(12.8)	(0.3)
Derivative Liabilities	0	0
N Y M E X I C E Natural Gas Contracts [Member] | Spire Missouri [Member] | Fair Value, Inputs, Level 1 [Member]
Derivative Asset Fair Value Gross Asset	39.6	104	25.3
Derivative Liability Fair Value Gross Liability	12.8	0.3
N Y M E X I C E Natural Gas Contracts [Member] | Spire Missouri [Member] | Fair Value, Inputs, Level 2 [Member]
Derivative Asset Fair Value Gross Asset	0	0	0
Derivative Liability Fair Value Gross Liability	0	0
Natural Gas Commodity Contracts [Member] | Gas Marketing [Member]
Effects of netting, asset	(5.3)	(5.5)	0
Derivative Assets	52.3	29.7	20.2
Effects of netting, liability	(5.3)	(5.5)	0
Derivative Liabilities	113	91.2	57.8
Natural Gas Commodity Contracts [Member] | Fair Value, Inputs, Level 1 [Member] | Gas Marketing [Member]
Derivative Asset Fair Value Gross Asset	0	0	0
Derivative Liability Fair Value Gross Liability	0	0	0
Natural Gas Commodity Contracts [Member] | Fair Value, Inputs, Level 2 [Member] | Gas Marketing [Member]
Derivative Asset Fair Value Gross Asset	57.6	35.2	20.2
Derivative Liability Fair Value Gross Liability	118.3	96.7	57.8
Interest Rate Swap [Member] | Other Segments [Member]
Effects of netting, asset	(7.6)	(5.2)	(5.5)
Derivative Assets	45.1	7.4	3.5
Effects of netting, liability	(7.6)	(5.2)	(5.5)
Derivative Liabilities	0	0.5	1.2
Interest Rate Swap [Member] | Fair Value, Inputs, Level 1 [Member] | Other Segments [Member]
Derivative Asset Fair Value Gross Asset	52.7	12.6	0
Derivative Liability Fair Value Gross Liability	7.6	5.7	0
Interest Rate Swap [Member] | Fair Value, Inputs, Level 2 [Member] | Other Segments [Member]
Derivative Asset Fair Value Gross Asset	0	0	9
Derivative Liability Fair Value Gross Liability	$ 0	$ 0	$ 6.7

Note 8 - Pension Plans and Ot_3

Note 8 - Pension Plans and Other Postretirement Benefits (Details Textual) - USD ($) $ in Thousands			3 Months Ended				9 Months Ended
	Dec. 23, 2021	Dec. 22, 2021	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Feb. 28, 2022	Sep. 30, 2021	Sep. 30, 2020
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Remeasurement due to Settlement			$ 0	$ 0	$ 0		$ 0
Regulatory Asset, Total			1,357,600		1,184,500		1,357,600		$ 1,300,000
Postretirement Benefit Plans, Recovery in Rates Base Allowance	$ 8,600
Spire Missouri [Member]
Regulatory Asset, Total			754,500		620,400		754,500		$ 759,400
Spire Missouri [Member] | Pension Costs [Member] | Missouri West [Member]
Regulatory Asset, Total	4,400	$ 5,500
Spire Missouri [Member] | Pension Costs [Member] | Missouri East [Member]
Regulatory Asset, Total	32,400	29,000
Spire Missouri [Member] | Pension and Other Postretirement Plans Costs [Member] | Missouri West [Member]
Regulatory Assets for Which No Return on Investment During Recovery Period Is Provided	$ 1,100	$ 3,300
Remaining Recovery Period of Regulatory Assets for which No Return on Investment During Recovery Period is Provided (Year)		8 years
Additional Remaining Recovery Period of Regulatory Assets for Which No Return on Investment During Recovery Period Is Provided (Year)	8 years
Spire Missouri [Member] | Pension and Other Postretirement Plans Costs [Member] | Missouri East [Member]
Regulatory Assets for Which No Return on Investment During Recovery Period Is Provided	$ 11,000	$ 21,600
Remaining Recovery Period of Regulatory Assets for which No Return on Investment During Recovery Period is Provided (Year)		8 years
Additional Remaining Recovery Period of Regulatory Assets for Which No Return on Investment During Recovery Period Is Provided (Year)	8 years
Spire Missouri [Member] | Pension Plan [Member]
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Remeasurement due to Settlement			47,400	21,600	36,800		47,400
Defined Benefit Plan, Benefit Obligation, Payment for Settlement			$ 17,300	$ 6,800	$ 9,100		$ 17,300
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate			4.55%	3.60%			4.55%	3.60%	3%
Anticipated Contributions to Pension Plans Qualified Trusts							$ 8,700
Spire Missouri [Member] | Pension Plan [Member] | Qualified Plan [Member]
Defined Benefit Plan, Plan Assets, Contributions by Employer							28,900
Spire Missouri [Member] | Pension Plan [Member] | Nonqualified Plan [Member]
Defined Benefit Plan, Plan Assets, Contributions by Employer							0
Spire Missouri [Member] | Pension Plan One [Member]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate					3.15%					2.85%
Spire Missouri [Member] | Pension Plan Two [Member]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate					3.10%					2.75%
Spire Missouri [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Plan Assets, Contributions by Employer							0
Anticipated Contributions to Pension Plans Qualified Trusts							0
Spire Alabama Inc [Member]
Regulatory Asset, Total			$ 567,000		$ 525,300		567,000		$ 502,100
Spire Alabama Inc [Member] | Pension Plan [Member]
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Remeasurement due to Settlement			3,600	$ 17,400	7,600		3,600
Defined Benefit Plan, Benefit Obligation, Payment for Settlement			$ 1,100	$ 4,900	$ 2,100	$ 3,800	$ 1,100
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate			4.55%	3.60%	3.25%	3.20%	4.55%	3.60%		2.95%
Defined Benefit Plan, Benefit Obligation, Settlement Losses Amortized Over Remaining Actuarial Life (Year)					11 years 8 months 12 days	11 years 4 months 24 days
Defined Benefit Plan, Plan Assets, Contributions by Employer							$ 8,500
Anticipated Contributions to Pension Plans Qualified Trusts							$ 5,900
Spire Alabama Inc [Member] | Pension Plan One [Member]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate									3%
Defined Benefit Plan, Benefit Obligation, Settlement Losses Amortized Over Remaining Actuarial Life (Year)			13 years	12 years 3 months 18 days			13 years
Spire Alabama Inc [Member] | Pension Plan Two [Member]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate									3.10%
Defined Benefit Plan, Benefit Obligation, Settlement Losses Amortized Over Remaining Actuarial Life (Year)			11 years 1 month 6 days	12 years 7 months 6 days			11 years 1 month 6 days
Spire Alabama Inc [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Plan Assets, Contributions by Employer							$ 0
Anticipated Contributions to Pension Plans Qualified Trusts							$ 0

Note 8 - Pension Plans and Ot_4

Note 8 - Pension Plans and Other Postretirement Benefits - Net Pension Costs (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Pension Plan [Member]
Service cost – benefits earned during the period	$ 4.8	$ 5.5	$ 15.6	$ 16.4
Interest cost on projected benefit obligation	5.4	5.5	15.8	15.3
Expected return on plan assets	(7.7)	(8.5)	(24.1)	(23.6)
Amortization of prior service credit	(1.1)	(0.9)	(3.4)	(2.4)
Amortization of actuarial loss	2.5	3.8	9.8	11.6
Loss on lump-sum settlements	17.8	11.2	29.5	15
Subtotal	21.7	16.6	43.2	32.3
Regulatory adjustment	(6.9)	1.3	2.5	19.9
Net pension cost	14.8	17.9	45.7	52.2
Pension Plan [Member] | Spire Missouri [Member]
Service cost – benefits earned during the period	3.5	3.9	11.2	11.7
Interest cost on projected benefit obligation	3.8	3.5	10.9	10.5
Expected return on plan assets	(5.7)	(5.7)	(17.6)	(16.9)
Amortization of prior service credit	(0.5)	(0.2)	(1.5)	(0.5)
Amortization of actuarial loss	2	2.8	7.6	8.5
Loss on lump-sum settlements	17.3	9.1	24.1	9.1
Subtotal	20.4	13.4	34.7	22.4
Regulatory adjustment	(8.3)	(1.4)	1.3	13.7
Net pension cost	12.1	12	36	36.1
Pension Plan [Member] | Spire Alabama Inc [Member]
Service cost – benefits earned during the period	1.1	1.3	3.8	4.2
Interest cost on projected benefit obligation	1.1	1.1	3.4	3.5
Expected return on plan assets	(1.2)	(1.4)	(4)	(4.5)
Amortization of prior service credit	(0.6)	(0.6)	(1.8)	(1.8)
Amortization of actuarial loss	0.5	1	2.2	3.1
Loss on lump-sum settlements	0.5	2.1	5.4	5.9
Subtotal	1.4	3.5	9	10.4
Regulatory adjustment	1.1	2.5	0.5	5.6
Net pension cost	2.5	6	9.5	16
Other Postretirement Benefits Plan [Member]
Service cost – benefits earned during the period	1.9	1.7	5.8	5.4
Interest cost on projected benefit obligation	1.6	1.4	4.6	4.4
Expected return on plan assets	(4.3)	(4)	(12.8)	(12.1)
Amortization of prior service credit	0.3	0.3	0.8	0.8
Amortization of actuarial loss	(0.5)	(0.4)	(1.7)	(1.2)
Subtotal	(1)	(1)	(3.3)	(2.7)
Regulatory adjustment	(0.1)	3.5	3.2	10.1
Net pension cost	(1.1)	2.5	(0.1)	7.4
Other Postretirement Benefits Plan [Member] | Spire Missouri [Member]
Service cost – benefits earned during the period	1.6	1.5	4.8	4.6
Interest cost on projected benefit obligation	1.2	1.1	3.4	3.3
Expected return on plan assets	(2.9)	(2.6)	(8.6)	(8.1)
Amortization of prior service credit	0.2	0.2	0.6	0.6
Amortization of actuarial loss	(0.5)	(0.4)	(1.5)	(1.1)
Subtotal	(0.4)	(0.2)	(1.3)	(0.7)
Regulatory adjustment	0.4	3.8	4.5	11.3
Net pension cost	0	3.6	3.2	10.6
Other Postretirement Benefits Plan [Member] | Spire Alabama Inc [Member]
Service cost – benefits earned during the period	0.3	0.2	0.9	0.7
Interest cost on projected benefit obligation	0.4	0.3	1.1	1
Expected return on plan assets	(1.3)	(1.3)	(3.9)	(3.8)
Amortization of prior service credit	0.1	0.1	0.2	0.2
Subtotal	(0.5)	(0.7)	(1.7)	(1.9)
Regulatory adjustment	(0.5)	(0.4)	(1.4)	(1.3)
Net pension cost	$ (1)	$ (1.1)	$ (3.1)	$ (3.2)

Note 9 - Information by Opera_3

Note 9 - Information by Operating Segment (Details Textual)	9 Months Ended
	Jun. 30, 2022
Number of Reportable Segments	2

Note 9 - Information by Opera_4

Note 9 - Information by Operating Segment - Segment Information by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenues from external customers	$ 448,000	$ 327,800	$ 1,884,300	$ 1,945,300
Intersegment revenues	0	0	0	0
Operating Revenues	448,000	327,800	1,884,300	1,945,300
Natural gas	203,300	96,900	844,500	897,200
Operation and maintenance	102,300	112,000	331,900	342,600
Depreciation and amortization	60,400	53,100	176,200	155,400
Taxes, other than income taxes	44,100	32,600	153,300	126,600
Total Operating Expenses	410,100	294,600	1,505,900	1,521,800
Operating Income (Loss)	37,900	33,200	378,400	423,500
Net Economic Earnings (Loss)	4,100	6,900	247,700	279,400
Consolidation, Eliminations [Member]
Revenues from external customers	0	0	0	0
Intersegment revenues	(12,200)		(38,800)	(36,100)
Operating Revenues	(12,200)		(38,800)	(36,100)
Natural gas	(8,300)		(27,100)	(26,000)
Operation and maintenance	(3,900)	(3,600)	(11,700)	(10,100)
Depreciation and amortization	0	0	0	0
Taxes, other than income taxes	0	0	0	0
Total Operating Expenses	(12,200)		(38,800)	(36,100)
Operating Income (Loss)	0	0	0	0
Net Economic Earnings (Loss)	0	0	0	0
Segment Reconciling Items [Member]
Intersegment revenues		(11,800)
Operating Revenues		(11,800)
Natural gas		(8,200)
Total Operating Expenses		(11,800)
Gas Utility [Member] | Operating Segments [Member]
Revenues from external customers	377,400	306,700	1,698,300	1,856,900
Intersegment revenues	0	0	0	1,100
Operating Revenues	377,400	306,700	1,698,300	1,858,000
Natural gas	144,500	84,900	710,700	908,400
Operation and maintenance	95,000	103,200	306,500	310,200
Depreciation and amortization	58,100	50,900	169,200	149,000
Taxes, other than income taxes	43,000	32,100	150,300	124,000
Total Operating Expenses	340,600	271,100	1,336,700	1,491,600
Operating Income (Loss)	36,800	35,600	361,600	366,400
Net Economic Earnings (Loss)	4,200	12,300	240,600	248,400
Gas Marketing [Member] | Operating Segments [Member]
Revenues from external customers	64,100	15,200	171,400	73,300
Intersegment revenues	0	(100)	0	0
Operating Revenues	64,100	15,100	171,400	73,300
Natural gas	67,100	20,200	160,900	14,700
Operation and maintenance	3,200	3,200	9,100	13,600
Depreciation and amortization	300	300	1,000	900
Taxes, other than income taxes	400	200	800	900
Total Operating Expenses	71,000	23,900	171,800	30,100
Operating Income (Loss)	(6,900)	(8,800)	(400)	43,200
Net Economic Earnings (Loss)	400	(5,200)	15,300	37,900
Other Segments [Member] | Operating Segments [Member]
Revenues from external customers	6,500	5,900	14,600	15,100
Intersegment revenues	12,200	11,900	38,800	35,000
Operating Revenues	18,700	17,800	53,400	50,100
Natural gas	0	0	0	100
Operation and maintenance	8,000	9,200	28,000	28,900
Depreciation and amortization	2,000	1,900	6,000	5,500
Taxes, other than income taxes	700	300	2,200	1,700
Total Operating Expenses	10,700	11,400	36,200	36,200
Operating Income (Loss)	8,000	6,400	17,200	13,900
Net Economic Earnings (Loss)	$ (500)	$ (200)	$ (8,200)	$ (6,900)

Note 9 - Information by Opera_5

Note 9 - Information by Operating Segment - Net Economic Earnings to Net Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Net Income	$ (1.4)	$ 5.3	$ 227.9	$ 281.6
Missouri regulatory adjustment	0	0	0	(9)
Fair value and timing adjustments	7.3	2.1	20.9	6.2
Income tax adjustments	(1.8)	(0.5)	(1.1)	0.6
Net Economic Earnings	$ 4.1	$ 6.9	$ 247.7	$ 279.4

Note 9 - Information by Opera_6

Note 9 - Information by Operating Segment - Total Assets by Segment (Details) - USD ($) $ in Millions	Jun. 30, 2022	Sep. 30, 2021	Jun. 30, 2021
Total Assets	$ 9,783.9	$ 9,356.4	$ 8,893.3
Operating Segments [Member] | Gas Utility [Member]
Total Assets	7,854.7	7,615.4	7,302.4
Operating Segments [Member] | Gas Marketing [Member]
Total Assets	595.5	466.1	349.2
Operating Segments [Member] | Other Segments [Member]
Total Assets	2,652.9	2,351.7	2,256.3
Consolidation, Eliminations [Member]
Total Assets	$ (1,319.2)	$ (1,076.8)	$ (1,014.6)

Note 10 - Commitments and Con_2

Note 10 - Commitments and Contingencies (Details Textual) $ in Millions	9 Months Ended
	Jun. 30, 2022 USD ($)
Long-Term Purchase Commitment, Amount	$ 1,998.9
Spire Missouri [Member]
Long-Term Purchase Commitment, Amount	1,178.9
Spire Alabama Inc [Member]
Long-Term Purchase Commitment, Amount	$ 707.2