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v3.23.3

Condensed Financial Information of Parent Company Only Disclosure - Condensed Statements of Operations (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2021
Condensed Income Statements, Captions [Line Items] |  |  |
Total revenues | $ 60,856.1 | $ 66,036.0 | $ 42,534.2
Interest expense | 802.2 | 135.5 | 49.6
Net operating revenues | 1,621.0 | 1,475.9 | 1,150.0
Non-interest expenses: |  |  |
Compensation and benefits | 868.6 | 794.8 | 679.1
Trade systems and market information | 74.0 | 66.2 | 58.8
Occupancy and equipment rental | 40.4 | 36.1 | 34.2
Selling and marketing | 54.0 | 55.3 | 33.3
Professional fees | 57.0 | 54.3 | 40.9
Travel and business development | 24.8 | 16.9 | 4.5
Non-trading technology and support | 61.6 | 52.4 | 46.0
Depreciation and amortization | 51.0 | 44.4 | 36.5
Communications | 9.1 | 8.3 | 9.3
Other | 66.4 | 60.6 | 46.3
Total compensation and other expenses | 1,323.4 | 1,205.1 | 999.3
Gain on acquisitions | 25.4 | 6.4 | 3.4
Income from operations, before tax | 323.0 | 277.2 | 154.1
Income tax benefit | (84.5) | (70.1) | (37.8)
Net income | 238.5 | 207.1 | 116.3
Interest income |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |
Total revenues | 987.6 | 219.0 | 102.4
StoneX Group |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |
Total revenues | 615.1 | 233.8 | 426.9
Interest expense | 83.1 | 60.9 | 49.6
Net operating revenues | 532.0 | 172.9 | 377.3
Non-interest expenses: |  |  |
Compensation and benefits | 137.9 | 113.7 | 99.9
Trade systems and market information | 10.2 | 6.5 | 6.0
Occupancy and equipment rental | 9.3 | 8.4 | 8.7
Selling and marketing | 2.2 | 4.9 | 1.0
Professional fees | 12.7 | 11.9 | 6.9
Travel and business development | 3.1 | 2.3 | 0.8
Non-trading technology and support | 37.4 | 30.6 | 24.9
Depreciation and amortization | 13.7 | 11.0 | 8.7
Communications | 3.4 | 1.8 | 1.7
Impairment | 0.0 | 0.0 | 0.1
Management services fees to affiliates | 188.4 | 4.3 | 3.6
Other | 12.1 | 12.4 | 8.7
Total compensation and other expenses | 430.4 | 207.8 | 171.0
Gain on acquisitions | 2.1 | 0.0 | 3.4
Income from operations, before tax | 103.7 | (34.9) | 209.7
Income tax benefit | 45.4 | 45.0 | 33.8
Net income | 149.1 | 10.1 | 243.5
Investment in subsidiaries for equity method accounting, earnings (loss) | 89.4 | 197.0 | (127.2)
StoneX Group | Management fees from affiliates |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |
Total revenues | 328.7 | 109.9 | 52.5
StoneX Group | Trading gains (losses), net |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |
Total revenues | 1.8 | (2.8) | (0.1)
StoneX Group | Consulting fees |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |
Total revenues | 0.2 | 0.1 | 0.3
StoneX Group | Interest income |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |
Total revenues | 3.3 | 2.2 | 1.5
StoneX Group | Dividend income from subsidiaries |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |
Total revenues | $ 281.1 | $ 124.4 | $ 372.7

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