CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Millions	Jun. 30, 2019	Sep. 30, 2018	Jun. 30, 2018
ASSETS
Utility Plant	$ 5,990.6	$ 5,653.3	$ 5,501.6
Less: Accumulated depreciation and amortization	1,770.4	1,682.8	1,669.8
Net Utility Plant	4,220.2	3,970.5	3,831.8
Non-utility Property (net of accumulated depreciation and amortization of $11.1, $10.4 and $9.7 at June 30, 2019, September 30, 2018, and June 30, 2018, respectively)	416.6	174.5	143.5
Goodwill	1,171.6	1,171.6	1,171.6
Other Investments	74.8	68.7	71.0
Total Other Property and Investments	1,663.0	1,414.8	1,386.1
Current Assets:
Cash and cash equivalents	5.8	4.4	6.9
Accounts receivable:
Utility	167.2	151.9	159.8
Other	193.2	167.3	111.6
Allowance for doubtful accounts	(23.7)	(22.4)	(24.7)
Delayed customer billings	19.4	6.9	32.8
Inventories:
Natural gas	123.8	175.2	119.8
Propane gas	10.7	12.0	12.0
Materials and supplies	23.7	23.1	21.4
Natural gas receivable	0.7	1.8	2.7
Derivative instrument assets	6.3	13.3	8.4
Regulatory assets	79.0	72.8	96.7
Prepayments	39.5	31.0	32.3
Other	4.2	22.3	5.2
Total Current Assets	649.8	659.6	584.9
Deferred Charges and Other Assets:
Regulatory assets	657.1	669.8	695.1
Other	141.9	128.9	87.0
Total Deferred Charges and Other Assets	799.0	798.7	782.1
Total Assets	7,332.0	6,843.6	6,584.9
Capitalization:
Preferred stock ($25.00 par value per share; 10.0 million depositary shares authorized, issued and outstanding at June 30, 2019)	242.0	0.0	0.0
Common stock (par value $1.00 per share; 70.0 million shares authorized; 50.8 million issued and outstanding at June 30, 2019, and 50.7 million shares issued and outstanding September 30, 2018, and June 30, 2018)	50.8	50.7	50.7
Paid-in capital and common stock	1,492.7	1,482.7	1,480.2
Retained earnings	844.3	715.6	772.4
Accumulated other comprehensive (loss) income	(17.2)	6.4	4.4
Total Shareholders' Equity	2,612.6	2,255.4	2,307.7
Redeemable noncontrolling interest	0.0	7.9	6.5
Long-term debt (less current portion)	2,042.3	1,900.1	2,024.5
Total Capitalization	4,654.9	4,163.4	4,338.7
Current Liabilities:
Current portion of long-term debt	165.0	175.5	155.5
Notes payable	434.0	553.6	191.0
Accounts payable	297.6	290.1	195.5
Advance customer billings	11.6	22.7	9.7
Wages and compensation accrued	43.6	39.7	39.6
Dividends payable	31.2	30.0	28.4
Customer deposits	35.7	35.5	35.4
Interest accrued	28.7	15.2	27.8
Taxes accrued	56.7	65.4	56.5
Regulatory liabilities	31.3	35.7	24.5
Other	84.2	58.3	50.2
Total Current Liabilities	1,219.6	1,321.7	814.1
Deferred Credits and Other Liabilities:
Deferred income taxes	490.4	435.8	476.8
Pension and postretirement benefit costs	172.1	180.2	219.3
Asset retirement obligations	328.9	321.1	305.9
Regulatory liabilities	396.3	354.6	364.3
Other	69.8	66.8	65.8
Total Deferred Credits and Other Liabilities	1,457.5	1,358.5	1,432.1
Commitments and Contingencies (Note 12)
Total Capitalization and Liabilities	7,332.0	6,843.6	6,584.9
Spire Missouri
ASSETS
Utility Plant	3,545.9	3,331.0	3,227.1
Less: Accumulated depreciation and amortization	753.3	705.8	697.6
Net Utility Plant	2,792.6	2,625.2	2,529.5
Goodwill	210.2	210.2	210.2
Other Investments	54.9	55.0	56.7
Total Other Property and Investments	265.1	265.2	266.9
Current Assets:
Cash and cash equivalents	3.7	2.0	3.5
Accounts receivable:
Utility	115.0	103.9	110.5
Associated companies	4.1	2.7	3.2
Other	22.2	16.6	18.7
Allowance for doubtful accounts	(16.5)	(16.0)	(18.2)
Delayed customer billings	19.4	6.9	32.8
Inventories:
Natural gas	72.5	127.9	76.8
Propane gas	10.7	12.0	12.0
Materials and supplies	13.5	13.2	12.4
Regulatory assets	30.2	30.7	55.1
Prepayments	25.4	19.1	20.3
Total Current Assets	300.2	319.0	327.1
Deferred Charges and Other Assets:
Regulatory assets	429.2	441.1	473.8
Other	53.7	50.8	7.7
Total Deferred Charges and Other Assets	482.9	491.9	481.5
Total Assets	3,840.8	3,701.3	3,605.0
Capitalization:
Paid-in capital and common stock	763.9	760.4	759.3
Retained earnings	613.9	501.1	519.8
Accumulated other comprehensive (loss) income	(1.5)	(1.6)	(1.7)
Total Shareholders' Equity	1,376.3	1,259.9	1,277.4
Long-term debt (less current portion)	924.8	824.4	824.2
Total Capitalization	2,301.1	2,084.3	2,101.6
Current Liabilities:
Current portion of long-term debt	0.0	50.0	150.0
Notes payable – associated companies	281.5	345.3	128.6
Accounts payable	62.3	81.7	62.3
Accounts payable – associated companies	5.0	5.8	4.9
Advance customer billings	3.4	9.5	0.0
Wages and compensation accrued	32.8	31.3	30.5
Dividends payable	0.0	9.0	9.0
Customer deposits	12.9	13.1	13.0
Interest accrued	10.7	7.8	11.6
Taxes accrued	28.3	32.0	26.5
Regulatory liabilities	23.4	16.7	8.7
Other	21.3	20.1	17.4
Total Current Liabilities	481.6	622.3	462.5
Deferred Credits and Other Liabilities:
Deferred income taxes	395.4	361.0	393.9
Pension and postretirement benefit costs	125.3	136.9	154.4
Asset retirement obligations	179.7	174.1	163.6
Regulatory liabilities	310.5	274.9	281.6
Other	47.2	47.8	47.4
Total Deferred Credits and Other Liabilities	1,058.1	994.7	1,040.9
Commitments and Contingencies (Note 12)
Total Capitalization and Liabilities	3,840.8	3,701.3	3,605.0
Spire Alabama
ASSETS
Utility Plant	2,080.5	1,964.3	1,920.3
Less: Accumulated depreciation and amortization	866.9	830.2	816.8
Net Utility Plant	1,213.6	1,134.1	1,103.5
Current Assets:
Cash and cash equivalents	0.0	0.0	0.0
Accounts receivable:
Utility	43.0	39.6	40.3
Associated companies	0.1	0.5	0.2
Other	8.8	8.5	6.5
Allowance for doubtful accounts	(5.2)	(3.9)	(3.6)
Inventories:
Natural gas	30.6	33.9	30.5
Materials and supplies	8.2	7.8	7.7
Regulatory assets	33.9	26.2	26.9
Prepayments	7.4	6.0	6.9
Other	0.0	2.4	1.7
Total Current Assets	126.8	121.0	117.1
Deferred Charges and Other Assets:
Regulatory assets	199.9	201.5	193.4
Deferred income taxes	77.3	101.8	98.2
Other	59.1	57.8	58.6
Total Deferred Charges and Other Assets	336.3	361.1	350.2
Total Assets	1,676.7	1,616.2	1,570.8
Capitalization:
Paid-in capital and common stock	370.9	390.9	390.9
Retained earnings	473.4	417.8	436.3
Total Shareholders' Equity	844.3	808.7	827.2
Long-term debt (less current portion)	372.1	322.6	322.5
Total Capitalization	1,216.4	1,131.3	1,149.7
Current Liabilities:
Current portion of long-term debt	40.0	0.0	0.0
Notes payable – associated companies	79.6	142.5	69.6
Accounts payable	48.0	48.4	44.6
Accounts payable – associated companies	3.4	2.1	2.0
Advance customer billings	6.7	13.1	9.5
Wages and compensation accrued	7.7	6.7	7.4
Customer deposits	19.8	18.6	18.6
Interest accrued	6.8	3.9	5.0
Taxes accrued	25.5	28.3	26.8
Regulatory liabilities	3.4	7.6	8.8
Other	4.4	3.2	3.3
Total Current Liabilities	245.3	274.4	195.6
Deferred Credits and Other Liabilities:
Pension and postretirement benefit costs	38.7	35.0	51.8
Asset retirement obligations	140.0	135.7	132.4
Regulatory liabilities	29.8	31.3	33.7
Other	6.5	8.5	7.6
Total Deferred Credits and Other Liabilities	215.0	210.5	225.5
Commitments and Contingencies (Note 12)
Total Capitalization and Liabilities	$ 1,676.7	$ 1,616.2	$ 1,570.8