v3.25.2
Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Millions
 9 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Operating Activities:    
Net Income (Loss) $ 311.5 $ 276.8
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 221.7 207.3
Deferred income taxes and investment tax credits 73.5 66.4
Changes in assets and liabilities:    
Accounts receivable (80.5) (28.5)
Inventories 39.0 49.5
Regulatory assets and liabilities 95.5 343.2
Accounts payable 48.2 (24.5)
Delayed/advance customer billings, net (25.4) (8.6)
Taxes accrued (12.0) (15.5)
Other assets and liabilities (94.8) (42.6)
Other 6.2 6.0
Net cash provided by operating activities 582.9 829.5
Investing Activities:    
Capital expenditures (699.7) (631.5)
Business acquisitions, net of cash acquired 0.0 (175.9)
Other 3.0 5.4
Net cash used in investing activities (696.7) (802.0)
Financing Activities:    
Repayment of long-term debt (7.0) (156.6)
Issuance of long-term debt 150.0 175.0
Issuance (repayment) of short-term debt, net 62.5 (184.5)
Issuance of common stock 76.0 287.2
Dividends paid on common stock (135.8) (124.3)
Dividends paid on preferred stock (11.1) (11.1)
Other (7.6) (5.3)
Net cash provided by (used in) financing activities 127.0 (19.6)
Net Increase in Cash, Cash Equivalents, and Restricted Cash 13.2 7.9
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period 34.9 25.8
Cash, Cash Equivalents, and Restricted Cash at End of Period 48.1 33.7
Supplemental disclosure of cash paid for:    
Interest, net of amounts capitalized (131.1) (142.9)
Income taxes (2.2) (0.9)
Spire Missouri [Member]    
Operating Activities:    
Net Income (Loss) 153.3 145.4
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 140.4 129.2
Deferred income taxes and investment tax credits 21.4 21.5
Changes in assets and liabilities:    
Accounts receivable (19.2) (30.7)
Inventories 31.4 29.2
Regulatory assets and liabilities 102.6 291.8
Accounts payable 16.2 (3.9)
Delayed/advance customer billings, net (24.9) (8.8)
Taxes accrued (7.0) (10.7)
Other assets and liabilities (64.1) (35.8)
Other 0.0 1.1
Net cash provided by operating activities 350.1 528.3
Investing Activities:    
Capital expenditures (481.9) (409.9)
Other 4.1 4.4
Net cash used in investing activities (477.8) (405.5)
Financing Activities:    
Issuance of long-term debt 150.0 0.0
Borrowings from (repayments to) Spire, net (96.6) (122.3)
Issuance of common stock 74.4 0.0
Other (0.1) 0.0
Net cash provided by (used in) financing activities 127.7 (122.3)
Net Increase in Cash, Cash Equivalents, and Restricted Cash 0.0 0.5
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period 0.0 0.8
Cash, Cash Equivalents, and Restricted Cash at End of Period 0.0 1.3
Supplemental disclosure of cash paid for:    
Interest, net of amounts capitalized (70.8) (84.1)
Income taxes (0.9) (0.4)
Spire Alabama Inc [Member]    
Operating Activities:    
Net Income (Loss) 90.2 84.7
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 53.5 54.5
Deferred income taxes and investment tax credits 30.2 28.8
Changes in assets and liabilities:    
Accounts receivable (18.5) (7.9)
Inventories 5.6 18.6
Regulatory assets and liabilities (6.7) 50.8
Accounts payable 8.9 1.2
Delayed/advance customer billings, net (0.7) 0.1
Taxes accrued (4.2) (1.8)
Other assets and liabilities (14.0) (6.6)
Other 0.4 0.3
Net cash provided by operating activities 144.7 222.7
Investing Activities:    
Capital expenditures (102.8) (71.7)
Other 0.8 0.5
Net cash used in investing activities (102.0) (71.2)
Financing Activities:    
Borrowings from (repayments to) Spire, net 8.0 (101.0)
Return of capital to Spire (36.5) (6.5)
Dividends paid on common stock (14.0) (42.9)
Net cash provided by (used in) financing activities (42.5) (150.4)
Net Increase in Cash, Cash Equivalents, and Restricted Cash 0.2 1.1
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period 1.5 1.2
Cash, Cash Equivalents, and Restricted Cash at End of Period 1.7 2.3
Supplemental disclosure of cash paid for:    
Interest, net of amounts capitalized (23.7) (27.4)
Income taxes $ 0.0 $ 0.0