v3.26.1
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($)
$ in Millions
 6 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Operating Activities:    
Net Income $ 377.2 $ 290.6
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 169.1 146.0
Deferred income taxes and investment tax credits 96.6 71.8
Changes in assets and liabilities, excluding impact of acquisition and divestitures:    
Accounts receivable (132.9) (252.4)
Inventories 91.4 84.8
Regulatory assets and liabilities 39.5 147.5
Accounts payable 6.8 97.1
Delayed/advance customer billings, net (84.6) (57.7)
Taxes accrued (27.2) (23.7)
Other assets and liabilities (32.7) (55.1)
Other (11.8) 4.9
Net cash provided by operating activities 491.4 453.8
Investing Activities:    
Capital expenditures (395.0) (479.2)
Business acquisitions, net of cash acquired (2,500.8) 0.0
Proceeds from sale of subsidiary 30.0 0.0
Other (0.5) 1.9
Net cash used in investing activities (2,866.3) (477.3)
Financing Activities:    
Issuance of long-term debt 2,497.1 0.0
Repayment of long-term debt (357.5) (7.0)
Redemption of preferred shares (242.0) 0.0
Preferred share redemption cost (8.0) 0.0
Issuance of delayed draw term loan 800.0 0.0
(Repayment) issuance of short-term debt, net (162.0) 68.0
Issuance of common stock 0.7 75.6
Dividends paid on common stock (96.1) (90.0)
Dividends paid on preferred stock (7.4) (7.4)
Other (5.5) (4.6)
Net cash provided by (used in) financing activities 2,419.3 34.6
Net Increase (Decrease) in Cash, Cash Equivalents, and Restricted Cash 44.4 11.1
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period 41.2 34.9
Cash, Cash Equivalents, and Restricted Cash at End of Period 85.6 46.0
Supplemental disclosure of cash paid for:    
Interest, net of amounts capitalized (87.8) (101.1)
Income taxes (2.1) (1.2)
Spire Missouri [Member]    
Operating Activities:    
Net Income 227.4 166.3
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 108.6 92.7
Deferred income taxes and investment tax credits 44.5 25.5
Changes in assets and liabilities, excluding impact of acquisition and divestitures:    
Accounts receivable (102.1) (131.3)
Inventories 59.9 50.5
Regulatory assets and liabilities 66.5 146.7
Accounts payable (7.2) 36.8
Delayed/advance customer billings, net (86.0) (56.0)
Taxes accrued (16.0) (12.3)
Other assets and liabilities (19.7) (40.2)
Other 0.7 0.5
Net cash provided by operating activities 276.6 279.2
Investing Activities:    
Capital expenditures (283.2) (322.1)
Other 2.9 2.5
Net cash used in investing activities (280.3) (319.6)
Financing Activities:    
Issuance of long-term debt 200.0 0.0
(Repayments to) Borrowings from Spire, net (185.2) (34.0)
Issuance of common stock 0.0 74.4
Dividends paid (9.9) 0.0
Other (1.2) (0.0)
Net cash provided by (used in) financing activities 3.7 40.4
Net Increase (Decrease) in Cash, Cash Equivalents, and Restricted Cash 0.0 (0.0)
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period 0.0 0.0
Cash, Cash Equivalents, and Restricted Cash at End of Period 0.0 0.0
Supplemental disclosure of cash paid for:    
Interest, net of amounts capitalized (56.2) (56.5)
Income taxes (0.3) (0.9)
Spire Alabama Inc [Member]    
Operating Activities:    
Net Income 91.6 85.7
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 38.5 35.7
Deferred income taxes and investment tax credits 30.7 28.7
Changes in assets and liabilities, excluding impact of acquisition and divestitures:    
Accounts receivable (38.5) (49.1)
Inventories 11.4 9.0
Regulatory assets and liabilities (25.5) 1.0
Accounts payable 3.4 21.1
Delayed/advance customer billings, net 0.5 (1.3)
Taxes accrued (6.8) (7.7)
Other assets and liabilities 7.9 (8.2)
Other 0.2 0.2
Net cash provided by operating activities 113.4 115.1
Investing Activities:    
Capital expenditures (86.4) (63.1)
Other (2.0) 0.4
Net cash used in investing activities (88.4) (62.7)
Financing Activities:    
(Repayments to) Borrowings from Spire, net 19.6 (6.6)
Return of capital to Spire (2.4) (30.0)
Dividends paid on common stock (42.1) (14.0)
Net cash provided by (used in) financing activities (24.9) (50.6)
Net Increase (Decrease) in Cash, Cash Equivalents, and Restricted Cash 0.1 1.8
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period 1.9 1.5
Cash, Cash Equivalents, and Restricted Cash at End of Period 2.0 3.3
Supplemental disclosure of cash paid for:    
Interest, net of amounts capitalized (13.9) (14.9)
Income taxes $ 0.0 $ 0.0