CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Millions	6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Operating Activities:
Net Income	$ 221.9	$ 214.2
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	89.1	81.9
Deferred income taxes and investment tax credits	45.5	(15.2)
Changes in assets and liabilities:
Accounts receivable	(194.3)	(122.8)
Inventories	83.9	97.3
Regulatory assets and liabilities	105.9	149.5
Accounts payable	33.6	(50.0)
Delayed/advance customer billings, net	(53.2)	(66.0)
Taxes accrued	(12.9)	(11.9)
Other assets and liabilities	(20.6)	(8.9)
Other	(1.4)	41.5
Net cash provided by operating activities	297.5	309.6
Investing Activities:
Capital expenditures	(376.8)	(215.8)
Business acquisitions	(7.9)	(17.1)
Other	(1.9)	(0.4)
Net cash used in investing activities	(386.6)	(233.3)
Financing Activities:
Issuance of long-term debt	190.0	75.0
Repayment of long-term debt	(9.1)	0.0
Repayment of short-term debt, net	(41.6)	(85.6)
Issuance of common stock	1.0	0.8
Dividends paid	(58.8)	(53.0)
Other	(2.7)	(3.1)
Net cash provided by (used in) financing activities	78.8	(65.9)
Net (Decrease) Increase in Cash, Cash Equivalents, and Restricted Cash	(10.3)	10.4
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period	21.4	7.4
Cash and Cash Equivalents at End of Period	11.1	17.8
Supplemental disclosure of cash paid for:
Interest, net of amounts capitalized	(49.0)	(47.2)
Income taxes	(2.0)	(0.6)
Cash and Cash Equivalents at Beginning of Period	4.4
Cash and Cash Equivalents at End of Period	11.1	17.8
Spire Missouri
Operating Activities:
Net Income	131.2	127.8
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	55.0	50.0
Deferred income taxes and investment tax credits	19.1	(23.6)
Changes in assets and liabilities:
Accounts receivable	(123.5)	(123.2)
Inventories	74.9	76.4
Regulatory assets and liabilities	107.3	111.7
Accounts payable	11.1	(10.8)
Delayed/advance customer billings, net	(46.4)	(55.5)
Taxes accrued	(4.8)	(8.9)
Other assets and liabilities	(14.4)	(6.7)
Other	2.6	40.9
Net cash provided by operating activities	212.1	178.1
Investing Activities:
Capital expenditures	(167.1)	(129.6)
Other	0.8	(0.1)
Net cash used in investing activities	(166.3)	(129.7)
Financing Activities:
Issuance of long-term debt	100.0	0.0
(Repayments to) borrowings from Spire - net	(112.4)	(27.2)
Dividends paid	(28.5)	(13.5)
Net cash provided by (used in) financing activities	(40.9)	(40.7)
Supplemental disclosure of cash paid for:
Interest, net of amounts capitalized	(23.8)	(22.8)
Income taxes	0.0	0.0
Net Increase (Decrease) in Cash and Cash Equivalents	4.9	7.7
Cash and Cash Equivalents at Beginning of Period	2.0	2.5
Cash and Cash Equivalents at End of Period	6.9	10.2
Spire Alabama
Operating Activities:
Net Income	67.0	6.0
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	27.3	25.9
Deferred income taxes and investment tax credits	22.5	83.7
Changes in assets and liabilities:
Accounts receivable	(33.5)	(38.6)
Inventories	3.7	6.4
Regulatory assets and liabilities	0.6	34.6
Accounts payable	4.0	0.3
Delayed/advance customer billings, net	(7.8)	(10.6)
Taxes accrued	(7.1)	(1.5)
Other assets and liabilities	8.9	4.3
Other	(2.4)	(0.5)
Net cash provided by operating activities	83.2	110.0
Investing Activities:
Capital expenditures	(65.7)	(51.8)
Other	(1.1)	(0.4)
Net cash used in investing activities	(66.8)	(52.2)
Financing Activities:
Issuance of long-term debt	90.0	75.0
(Repayments to) borrowings from Spire - net	(68.8)	(87.6)
Return of capital to Spire	(20.0)	(30.0)
Dividends paid	(17.0)	(15.0)
Other	(0.5)	(0.3)
Net cash provided by (used in) financing activities	(16.3)	(57.9)
Supplemental disclosure of cash paid for:
Interest, net of amounts capitalized	(8.7)	(7.0)
Income taxes	0.0	0.0
Net Increase (Decrease) in Cash and Cash Equivalents	0.1	(0.1)
Cash and Cash Equivalents at Beginning of Period	0.0	0.1
Cash and Cash Equivalents at End of Period	$ 0.1	$ 0.0