CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2015
Operating Activities:
Net income	$ 161.6	$ 144.2	$ 136.9
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	154.1	137.5	130.8
Deferred income taxes and investment tax credits	77.0	68.8	65.5
Changes in assets and liabilities:
Accounts receivable – net	(63.0)	(12.3)	(4.8)
Unamortized purchased gas adjustments	(50.9)	(52.8)	27.1
Accounts payable	51.1	30.0	(30.0)
Delayed/advance customer billings – net	(40.0)	26.9	20.3
Taxes accrued	5.8	(0.4)	(17.0)
Inventories	(23.5)	16.5	54.8
Other assets and liabilities	11.9	(35.0)	(67.6)
Other	4.2	4.9	6.4
Net cash provided by operating activities	288.3	328.3	322.4
Investing Activities:
Capital expenditures	(438.1)	(293.3)	(289.8)
Acquisition of Spire EnergySouth (net of $2.0 cash acquired) and final settlement	3.8	(317.7)	0.0
Final settlement related to acquisition of Spire Alabama	0.0	0.0	(8.2)
Other	0.8	(1.7)	(0.7)
Net cash used in investing activities	(433.5)	(612.7)	(298.7)
Financing Activities:
Issuance of long-term debt	420.0	245.0	35.0
Repayment of long-term debt	(393.8)	(80.0)	(34.8)
Issuance of short-term debt - net	78.6	60.7	50.8
Issuance of common stock	146.9	137.1	3.1
Dividends paid	(96.2)	(85.2)	(79.0)
Other	(8.1)	(1.8)	(1.1)
Net cash provided by (used in) financing activities	147.4	275.8	(26.0)
Net Increase (Decrease) in Cash and Cash Equivalents	2.2	(8.6)	(2.3)
Cash and Cash Equivalents at Beginning of Year	5.2	13.8	16.1
Cash and Cash Equivalents at End of Year	7.4	5.2	13.8
Supplemental disclosure of cash (paid) refunded for:
Interest	(85.5)	(72.5)	(65.3)
Income taxes	(1.3)	2.9	1.3
Spire Missouri
Operating Activities:
Net income	113.0	105.9	105.3
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	93.1	88.6	82.6
Deferred income taxes and investment tax credits	47.5	45.3	45.4
Changes in assets and liabilities:
Accounts receivable – net	(20.5)	35.7	9.9
Unamortized purchased gas adjustments	(11.6)	(18.7)	21.3
Accounts payable	16.8	0.9	(11.4)
Delayed/advance customer billings – net	(37.6)	24.9	17.9
Taxes accrued	5.0	4.9	(14.6)
Inventories	(13.0)	11.0	51.2
Other assets and liabilities	(11.6)	(29.6)	(32.8)
Other	1.6	2.3	2.8
Net cash provided by operating activities	182.7	271.2	277.6
Investing Activities:
Capital expenditures	(282.2)	(197.8)	(198.6)
Other	1.1	1.1	2.9
Net cash used in investing activities	(281.1)	(196.7)	(195.7)
Financing Activities:
Issuance of first mortgage bonds	170.0	0.0	0.0
Issuance of short-term debt - net	(243.7)	10.7	(5.7)
Borrowings from Spire	203.0	0.0	18.4
Repayment of borrowings from Spire	0.0	0.0	(18.4)
Dividends paid	(28.7)	(84.8)	(78.7)
Other	(1.8)	0.0	0.5
Net cash provided by (used in) financing activities	98.8	(74.1)	(83.9)
Net Increase (Decrease) in Cash and Cash Equivalents	0.4	0.4	(2.0)
Cash and Cash Equivalents at Beginning of Year	2.1	1.7	3.7
Cash and Cash Equivalents at End of Year	2.5	2.1	1.7
Supplemental disclosure of cash (paid) refunded for:
Interest	(38.6)	(35.7)	(31.0)
Income taxes	0.0	2.1	0.7
Spire Alabama
Operating Activities:
Net income	58.1	53.2	48.0
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	49.9	47.8	47.3
Deferred income taxes and investment tax credits	35.8	33.2	29.2
Changes in assets and liabilities:
Accounts receivable – net	(10.0)	(11.1)	(9.1)
Unamortized purchased gas adjustments	(39.6)	(33.8)	5.8
Accounts payable	8.8	9.1	(10.4)
Delayed/advance customer billings – net	(2.5)	2.0	2.4
Taxes accrued	1.8	(5.2)	(4.0)
Inventories	0.1	5.3	7.2
Other assets and liabilities	(16.6)	(3.2)	(18.0)
Other	(1.3)	0.9	2.0
Net cash provided by operating activities	84.5	98.2	100.4
Investing Activities:
Capital expenditures	(113.9)	(93.4)	(85.8)
Other	(0.4)	(2.5)	(1.0)
Net cash used in investing activities	(114.3)	(95.9)	(86.8)
Financing Activities:
Issuance of long-term debt	0.0	80.0	35.0
Repayment of long-term debt	0.0	(80.0)	(34.8)
Issuance of short-term debt - net	(82.0)	51.0	15.0
Borrowings from Spire	169.9	0.0	0.0
Return of capital to Spire	(31.0)	(29.0)	(27.0)
Dividends paid	(27.0)	(31.5)	0.0
Other	0.0	0.0	(0.2)
Net cash provided by (used in) financing activities	29.9	(9.5)	(12.0)
Net Increase (Decrease) in Cash and Cash Equivalents	0.1	(7.2)	1.6
Cash and Cash Equivalents at Beginning of Year	0.0	7.2	5.6
Cash and Cash Equivalents at End of Year	0.1	0.0	7.2
Supplemental disclosure of cash (paid) refunded for:
Interest	(12.8)	(12.4)	(12.3)
Income taxes	$ 0.0	$ 0.8	$ 0.0