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Credit Facilities - Number of Credit Facilities (Details) | 6 Months Ended |  |  |
--- | --- | --- | --- | ---
Mar. 31, 2023 USD ($) facility | Dec. 30, 2022 USD ($) | Sep. 30, 2022 USD ($) | Dec. 31, 2020 USD ($)
Line of Credit Facility [Line Items] |  |  |  |
Number of credit facilities | facility | 4 |  |  |
Maximum borrowing capacity under credit facilities | $ 1,130,000,000 |  |  |
Notes payable to bank | $ 7,800,000 |  | $ 8,100,000 | $ 9,000,000
Debt, weighted average interest rate |  |  |  | 2.35%
Senior StoneX Group Inc. Committed Credit Facility - Revolving Line of Credit |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Term of syndicated loan facility | 3 years |  |  |
Line of credit facility borrowing | $ 475,000,000.0 |  |  |
Revolving Credit Facility |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Line of credit facility borrowing | 475,000,000 |  |  |
StoneX Financial Inc. |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Line of credit facility borrowing | 180,000,000.0 | $ 75,000,000 |  |
StoneX Commodity Solutions LLC |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Line of credit facility borrowing | 400,000,000 |  |  |
StoneX Financial Ltd. |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Line of credit facility borrowing | $ 75,000,000.0 |  |  |

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- Definition Number of credit facilities available to the company. + References No definition available. + Details
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- Definition Period remaining on line of credit facility before it terminates, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Including the current and noncurrent portions, the carrying value as of the balance sheet date of notes payable to banks, excluding mortgage notes, initially due beyond one year or beyond the operating cycle if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 + Details
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