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Physical Commodities Inventory -Narrative (Details) bu in Millions, $ in Millions | Oct. 06, 2021 USD ($) bu | Sep. 30, 2021 USD ($) bu | Sep. 30, 2020 USD ($)
--- | --- | --- | ---
Inventory [Line Items] |  |  |
Physical Ag & Energy |  | $ 248.6 | $ 201.5
Soybeans |  |  |
Inventory [Line Items] |  |  |
Agricultural related inventory | bu |  | 2.6 |
Physical Ag & Energy |  | $ 31.2 |
Soybeans | Subsequent Event |  |  |
Inventory [Line Items] |  |  |
Agricultural related inventory | bu | 2.8 |  |
Inventory, firm purchase commitment | $ 2.5 |  |
Physical precious metals trading |  |  |
Inventory [Line Items] |  |  |
Inventory adjustments |  | $ 3.5 | 0.7
Crude Oil And Low Sulfur Fuel Oil |  |  |
Inventory [Line Items] |  |  |
Inventory adjustments |  |  | $ 7.6

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