CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Millions	Mar. 31, 2019	Sep. 30, 2018	Mar. 31, 2018
ASSETS
Utility Plant	$ 5,856.8	$ 5,653.3	$ 5,403.4
Less: Accumulated depreciation and amortization	1,738.5	1,682.8	1,645.0
Net Utility Plant	4,118.3	3,970.5	3,758.4
Non-utility Property (net of accumulated depreciation and amortization of $11.9, $10.4 and $9.1 at March 31, 2019, September 30, 2018, and March 31, 2018, respectively)	329.1	174.5	116.9
Goodwill	1,171.6	1,171.6	1,171.6
Other Investments	68.4	68.7	66.4
Total Other Property and Investments	1,569.1	1,414.8	1,354.9
Current Assets:
Cash and cash equivalents	11.1	4.4	17.8
Accounts receivable:
Utility	318.6	151.9	302.4
Other	196.5	167.3	111.3
Allowance for doubtful accounts	(28.1)	(22.4)	(25.7)
Delayed customer billings	43.8	6.9	45.6
Inventories:
Natural gas	91.3	175.2	94.3
Propane gas	10.7	12.0	12.0
Materials and supplies	24.3	23.1	22.2
Natural gas receivable	0.3	1.8	3.0
Derivative instrument assets	24.5	13.3	7.3
Regulatory assets	75.3	72.8	97.7
Prepayments	21.0	31.0	18.3
Other	4.3	22.3	12.1
Total Current Assets	793.6	659.6	718.3
Deferred Charges and Other Assets:
Regulatory assets	659.9	669.8	673.6
Other	132.7	128.9	81.6
Total Deferred Charges and Other Assets	792.6	798.7	755.2
Total Assets	7,273.6	6,843.6	6,586.8
Capitalization:
Common stock (par value $1.00 per share; 70.0 million shares authorized; 50.7 million, 50.7 million and 48.4 million shares issued and outstanding at March 31, 2019, September 30, 2018, and March 31, 2018, respectively)	50.7	50.7	48.4
Paid-in capital and common stock	1,485.6	1,482.7	1,327.3
Retained earnings	877.5	715.6	773.7
Accumulated other comprehensive (loss) income	(7.8)	6.4	4.1
Total Shareholders' Equity	2,406.0	2,255.4	2,153.5
Redeemable noncontrolling interest	0.0	7.9	6.5
Long-term debt (less current portion)	2,041.9	1,900.1	2,073.9
Total Capitalization	4,447.9	4,163.4	4,233.9
Current Liabilities:
Current portion of long-term debt	215.0	175.5	105.5
Notes payable	512.0	553.6	391.7
Accounts payable	324.8	290.1	194.8
Advance customer billings	6.5	22.7	8.1
Wages and compensation accrued	32.2	39.7	30.0
Dividends payable	31.1	30.0	28.3
Customer deposits	36.7	35.5	36.1
Interest accrued	18.9	15.2	15.8
Taxes accrued	50.9	65.4	49.1
Regulatory liabilities	35.3	35.7	22.2
Other	73.3	58.3	46.4
Total Current Liabilities	1,336.7	1,321.7	928.0
Deferred Credits and Other Liabilities:
Deferred income taxes	490.2	435.8	465.6
Pension and postretirement benefit costs	178.3	180.2	233.4
Asset retirement obligations	325.5	321.1	302.8
Regulatory liabilities	431.3	354.6	353.1
Other	63.7	66.8	70.0
Total Deferred Credits and Other Liabilities	1,489.0	1,358.5	1,424.9
Commitments and Contingencies (Note 11)
Total Capitalization and Liabilities	7,273.6	6,843.6	6,586.8
Spire Missouri
ASSETS
Utility Plant	3,460.1	3,331.0	3,163.8
Less: Accumulated depreciation and amortization	736.7	705.8	687.2
Net Utility Plant	2,723.4	2,625.2	2,476.6
Goodwill	210.2	210.2	210.2
Other Investments	52.8	55.0	59.0
Total Other Property and Investments	263.0	265.2	269.2
Current Assets:
Cash and cash equivalents	6.9	2.0	10.2
Accounts receivable:
Utility	231.8	103.9	222.4
Associated companies	2.4	2.7	1.3
Other	18.5	16.6	26.0
Allowance for doubtful accounts	(21.9)	(16.0)	(20.7)
Delayed customer billings	43.8	6.9	45.6
Inventories:
Natural gas	53.1	127.9	60.0
Propane gas	10.7	12.0	12.0
Materials and supplies	14.4	13.2	13.1
Regulatory assets	30.0	30.7	51.7
Prepayments	11.1	19.1	10.7
Total Current Assets	400.8	319.0	432.3
Deferred Charges and Other Assets:
Regulatory assets	433.6	441.1	446.6
Other	53.0	50.8	9.0
Total Deferred Charges and Other Assets	486.6	491.9	455.6
Total Assets	3,873.8	3,701.3	3,633.7
Capitalization:
Paid-in capital and common stock	762.8	760.4	758.4
Retained earnings	612.8	501.1	517.3
Accumulated other comprehensive (loss) income	(1.6)	(1.6)	(1.8)
Total Shareholders' Equity	1,374.0	1,259.9	1,273.9
Long-term debt (less current portion)	924.7	824.4	874.0
Total Capitalization	2,298.7	2,084.3	2,147.9
Current Liabilities:
Current portion of long-term debt	50.0	50.0	100.0
Notes payable – associated companies	232.9	345.3	175.8
Accounts payable	72.6	81.7	69.2
Accounts payable – associated companies	8.1	5.8	3.6
Advance customer billings	0.0	9.5	0.0
Wages and compensation accrued	24.5	31.3	23.4
Dividends payable	0.0	9.0	13.5
Customer deposits	13.0	13.1	13.2
Interest accrued	8.6	7.8	8.2
Taxes accrued	27.2	32.0	25.2
Regulatory liabilities	24.2	16.7	2.7
Other	22.4	20.1	19.4
Total Current Liabilities	483.5	622.3	454.2
Deferred Credits and Other Liabilities:
Deferred income taxes	390.5	361.0	388.6
Pension and postretirement benefit costs	132.7	136.9	161.9
Asset retirement obligations	177.8	174.1	161.9
Regulatory liabilities	345.1	274.9	272.5
Other	45.5	47.8	46.7
Total Deferred Credits and Other Liabilities	1,091.6	994.7	1,031.6
Commitments and Contingencies (Note 11)
Total Capitalization and Liabilities	3,873.8	3,701.3	3,633.7
Spire Alabama
ASSETS
Utility Plant	2,032.5	1,964.3	1,885.4
Less: Accumulated depreciation and amortization	852.8	830.2	803.9
Net Utility Plant	1,179.7	1,134.1	1,081.5
Current Assets:
Cash and cash equivalents	0.1	0.0	0.0
Accounts receivable:
Utility	69.8	39.6	64.1
Associated companies	0.1	0.5	0.1
Other	8.4	8.5	6.4
Allowance for doubtful accounts	(3.8)	(3.9)	(2.7)
Inventories:
Natural gas	30.1	33.9	26.2
Materials and supplies	7.8	7.8	7.8
Regulatory assets	30.4	26.2	32.1
Prepayments	3.9	6.0	3.6
Other	0.2	2.4	2.0
Total Current Assets	147.0	121.0	139.6
Deferred Charges and Other Assets:
Regulatory assets	198.9	201.5	198.9
Deferred income taxes	79.3	101.8	100.3
Other	58.9	57.8	57.9
Total Deferred Charges and Other Assets	337.1	361.1	357.1
Total Assets	1,663.8	1,616.2	1,578.2
Capitalization:
Paid-in capital and common stock	370.9	390.9	390.9
Retained earnings	467.8	417.8	437.5
Total Shareholders' Equity	838.7	808.7	828.4
Long-term debt (less current portion)	372.1	322.6	322.5
Total Capitalization	1,210.8	1,131.3	1,150.9
Current Liabilities:
Current portion of long-term debt	40.0	0.0	0.0
Notes payable – associated companies	73.7	142.5	82.3
Accounts payable	54.6	48.4	42.9
Accounts payable – associated companies	3.1	2.1	1.5
Advance customer billings	5.3	13.1	7.9
Wages and compensation accrued	5.3	6.7	5.3
Customer deposits	20.5	18.6	19.0
Interest accrued	5.4	3.9	4.1
Taxes accrued	21.2	28.3	21.9
Regulatory liabilities	6.1	7.6	10.8
Other	4.6	3.2	2.4
Total Current Liabilities	239.8	274.4	198.1
Deferred Credits and Other Liabilities:
Pension and postretirement benefit costs	37.4	35.0	55.3
Asset retirement obligations	138.6	135.7	131.1
Regulatory liabilities	30.5	31.3	35.0
Other	6.7	8.5	7.8
Total Deferred Credits and Other Liabilities	213.2	210.5	229.2
Commitments and Contingencies (Note 11)
Total Capitalization and Liabilities	$ 1,663.8	$ 1,616.2	$ 1,578.2