v3.26.1
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($)
$ in Millions
 9 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Operating Activities:    
Net Income $ 588.4 $ 311.5
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 264.2 221.7
Deferred income taxes and investment tax credits 156.0 73.5
Gain on sale of discontinued operations (329.4) 0.0
Changes in assets and liabilities, excluding impact of acquisition and divestitures:    
Accounts receivable 132.6 (80.5)
Inventories 79.3 39.0
Regulatory assets and liabilities 8.9 95.5
Accounts payable (84.4) 48.2
Delayed/advance customer billings, net (56.6) (25.4)
Taxes accrued (11.8) (12.0)
Other assets and liabilities (1.0) (94.8)
Other (132.6) 6.2
Net cash provided by operating activities 613.6 582.9
Investing Activities:    
Capital expenditures (608.4) (699.7)
Business acquisitions, net of cash acquired (2,500.8) 0.0
Proceeds from sale of discontinued operations 819.9 0.0
Proceeds from sale of subsidiary 30.0 0.0
Other (9.6) 3.0
Net cash used in investing activities (2,268.9) (696.7)
Financing Activities:    
Issuance of long-term debt 2,488.1 150.0
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 of delayed draw term loan (800.0) 0.0
(Repayment) issuance of short-term debt, net (53.5) 62.5
Issuance of common stock 0.0 76.0
Dividends paid on common stock (144.8) (135.8)
Dividends paid on preferred stock (7.4) (11.1)
Other (1.8) (7.6)
Net cash provided by (used in) financing activities 1,673.1 127.0
Net Increase (Decrease) in Cash, Cash Equivalents, and Restricted Cash 17.8 13.2
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period 41.2 34.9
Cash, Cash Equivalents, and Restricted Cash at End of Period 59.0 48.1
Supplemental disclosure of cash paid for:    
Interest, net of amounts capitalized (178.7) (131.1)
Income taxes (3.0) (2.2)
Spire Missouri [Member]    
Operating Activities:    
Net Income 215.2 153.3
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 165.0 140.4
Deferred income taxes and investment tax credits 41.2 21.4
Changes in assets and liabilities, excluding impact of acquisition and divestitures:    
Accounts receivable (0.4) (19.2)
Inventories 50.3 31.4
Regulatory assets and liabilities 41.8 102.6
Accounts payable (14.1) 16.2
Delayed/advance customer billings, net (56.5) (24.9)
Taxes accrued (8.6) (7.0)
Other assets and liabilities (49.3) (64.1)
Other 1.2 0.0
Net cash provided by operating activities 385.8 350.1
Investing Activities:    
Capital expenditures (435.7) (481.9)
Other 4.0 4.1
Net cash used in investing activities (431.7) (477.8)
Financing Activities:    
Issuance of long-term debt 200.0 150.0
Borrowings from (Repayments to) Spire, net (122.8) (96.6)
Issuance of common stock 0.0 74.4
Dividends paid (29.9) 0.0
Other (1.4) (0.1)
Net cash provided by (used in) financing activities 45.9 127.7
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 (59.6) (70.8)
Income taxes (0.3) (0.9)
Spire Alabama Inc [Member]    
Operating Activities:    
Net Income 98.9 90.2
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 59.8 53.5
Deferred income taxes and investment tax credits 33.2 30.2
Changes in assets and liabilities, excluding impact of acquisition and divestitures:    
Accounts receivable (9.4) (18.5)
Inventories (4.1) 5.6
Regulatory assets and liabilities (35.8) (6.7)
Accounts payable 7.5 8.9
Delayed/advance customer billings, net 0.0 (0.7)
Taxes accrued (2.9) (4.2)
Other assets and liabilities (6.3) (14.0)
Other 0.2 0.4
Net cash provided by operating activities 141.1 144.7
Investing Activities:    
Capital expenditures (124.8) (102.8)
Other (3.0) 0.8
Net cash used in investing activities (127.8) (102.0)
Financing Activities:    
Borrowings from (Repayments to) Spire, net 38.0 8.0
Return of capital to Spire (6.6) (36.5)
Dividends paid on common stock (43.8) (14.0)
Net cash provided by (used in) financing activities (12.4) (42.5)
Net Increase (Decrease) in Cash, Cash Equivalents, and Restricted Cash 0.9 0.2
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period 1.9 1.5
Cash, Cash Equivalents, and Restricted Cash at End of Period 2.8 1.7
Supplemental disclosure of cash paid for:    
Interest, net of amounts capitalized (19.2) (23.7)
Income taxes $ 0.0 $ 0.0