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v3.23.3

Note 7 - Notes Payable and Credit Agreements - Short-term Borrowings (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022
Term Loan [Member] | Spire Missouri [Member] |  |
Highest borrowings outstanding | $ 656.9 |
Lowest borrowings outstanding | 3.8 |
Weighted average borrowings | $ 327.9 |
Weighted average interest rate | 4.90% |
Borrowings outstanding | $ 540.6 | $ 445.3
Weighted average interest rate | 5.60% |
Spire Note [Member] | Spire Missouri [Member] |  |
Highest borrowings outstanding | $ 274.0 |
Lowest borrowings outstanding | 76.7 |
Weighted average borrowings | $ 119.1 |
Weighted average interest rate | 4.90% |
Borrowings outstanding | $ 124.1 | $ 260.9
Weighted average interest rate | 5.60% | 3.30%
Spire Note [Member] | Spire Alabama Inc [Member] |  |
Highest borrowings outstanding | $ 1,482.0 |
Lowest borrowings outstanding | 489.0 |
Weighted average borrowings | $ 843.1 |
Weighted average interest rate | 5.00% |
Borrowings outstanding | $ 955.5 | $ 1,037.5
Weighted average interest rate | 5.60% | 3.30%
Parent Company [Member] | Term Loan [Member] |  |
Highest borrowings outstanding | $ 250.0 |
Lowest borrowings outstanding | 0.0 |
Weighted average borrowings | $ 66.8 |
Weighted average interest rate | 5.50% |
Borrowings outstanding | $ 0.0 | $ 0.0
Weighted average interest rate |  | 0.00%
Parent Company [Member] | Commercial Paper [Member] |  |
Highest borrowings outstanding | 1,282.0 |
Lowest borrowings outstanding | 354.4 |
Weighted average borrowings | $ 776.3 |
Weighted average interest rate | 5.00% |
Borrowings outstanding | $ 955.5 | $ 1,037.5
Weighted average interest rate | 5.60% | 3.30%

X
- Definition Minimum amount borrowed under the credit facility at any time during the period. + References No definition available. + Details
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- Definition Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 852 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481372/852-10-55-10 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)(a)(1)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(13)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)(a)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
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- Definition Weighted average interest rate of short-term debt outstanding calculated at point in time. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
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- Definition For the form of debt having an initial term of less than one year or less than the normal operating cycle, if longer, average borrowings during the period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(3)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483575/946-220-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1402 -Paragraph (a) -Publisher SEC Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1402 -Paragraph (b) -Subparagraph (1) -Publisher SEC + Details
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