| Sep 30,
2011 | Sep 30,
2012 | Sep 30,
2013 | Sep 30,
2014 | Sep 30,
2015 | Sep 30,
2016 | Sep 30,
2017 | Sep 30,
2018 | Sep 30,
2019 | Sep 30,
2020 | Sep 30,
2021 | Sep 30,
2022 | Sep 30,
2023 | Sep 30,
2024 |
|---|
| Net income | 37 | 15 | 19 | 19 | 56 | 55 | 6 | 56 | 85 | 170 | 116 | 207 | 239 | 261 |
|---|
| Depreciation and amortization | - | 7 | 8 | 7 | 7 | 8 | 10 | 12 | 14 | 20 | 37 | 44 | 51 | 53 |
|---|
| Amortization of operating right of use assets | - | - | - | - | - | - | - | - | - | 10 | 12 | 16 | 14 | 22 |
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| Provision for bad debts, net of recoveries | - | - | - | - | - | - | - | - | 3 | - | - | - | 17 | 1 |
|---|
| Deferred income taxes | 2 | - | - | - | - | - | - | - | 4 | 4 | 3 | -0 | -2 | -10 |
|---|
| Loss on extinguishment of debt | - | - | - | - | - | - | - | - | - | - | - | - | - | -4 |
|---|
| Amortization of Debt Issuance Costs and Discounts | 2 | 2 | 1 | 1 | 1 | 1 | 2 | 1 | 2 | 7 | 4 | 5 | 6 | 5 |
|---|
| Actuarial adjustment on pension and postretirement benefits | - | - | - | - | - | - | 0 | 0 | 0 | 0 | 0 | 0 | -0 | -0 |
|---|
| Amortization of share-based compensation expense | 2 | 6 | 9 | 4 | 4 | 5 | 6 | 7 | 8 | 10 | 14 | 18 | 28 | 37 |
|---|
| Gain on acquisition | - | - | - | - | - | 6 | - | - | - | - | 3 | - | 24 | - |
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| Securities and other assets segregated under federal and other regulations | - | - | - | - | - | - | - | - | - | - | 1 | 592 | -599 | 46 |
|---|
| Securities purchased under agreements to resell | - | - | - | - | -15 | 285 | -203 | 465 | 554 | 272 | 544 | -568 | 1,308 | 2,222 |
|---|
| Securities borrowed | - | - | - | - | - | - | 80 | 139 | 1,198 | 17 | 723 | -953 | -81 | 533 |
|---|
| Deposits with and receivables from broker-dealers, clearing organizations, and counterparties, net | -47 | -43 | 53 | -1 | 150 | -136 | 889 | -409 | 242 | 326 | 132 | 2,174 | 596 | -262 |
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| Receivable from clients, net | 39 | -46 | 24 | -32 | 169 | -98 | 116 | 24 | 134 | -1 | 68 | 120 | 81 | 330 |
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| Notes receivable, net | - | - | - | - | - | - | - | - | - | -1 | 4 | -1 | 0 | -0 |
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| Income taxes receivable | -1 | 3 | 0 | -4 | - | -8 | -0 | 1 | 4 | 11 | 10 | -10 | 13 | -7 |
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| Financial instruments owned, at fair value | -281 | -58 | -3 | 43 | 565 | 193 | 126 | 309 | 113 | 553 | 1,627 | -187 | 858 | 1,714 |
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| Physical commodities inventory, net | 36 | -29 | -73 | -18 | -7 | 91 | 2 | 99 | -3 | 52 | 166 | 67 | 1 | 144 |
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| Other assets | 12 | 2 | -4 | -0 | 16 | 17 | 16 | 3 | 8 | 4 | 17 | 10 | 60 | 120 |
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| Accounts payable and other accrued liabilities | 31 | 11 | -0 | 2 | 23 | 8 | -20 | 19 | 7 | 43 | 36 | 101 | 83 | -5 |
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| Operating lease liabilities | - | - | - | - | - | - | - | - | - | -9 | -9 | -16 | -8 | -10 |
|---|
| Payable to clients | 366 | 248 | 24 | 192 | 332 | 172 | 291 | 520 | -47 | 2,094 | 2,147 | 2,055 | 81 | 370 |
|---|
| Payable to broker-dealers, clearing organizations and counterparties | -0 | 36 | -22 | -5 | 251 | -54 | -124 | -28 | 176 | 271 | 76 | 46 | -218 | 292 |
|---|
| Income taxes payable | 2 | 2 | 1 | 5 | 2 | 0 | 0 | 3 | 2 | -0 | -9 | 3 | 29 | -20 |
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| Securities sold under agreements to repurchase | - | - | - | - | 186 | 160 | 226 | 544 | 837 | 382 | 1,185 | -1,145 | 1,331 | 4,055 |
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| Securities loaned | - | - | - | - | - | - | 94 | 167 | 1,182 | -18 | 712 | -964 | -72 | 499 |
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| Financial instruments sold, not yet purchased, at fair value | 203 | -215 | 5 | 84 | 178 | 274 | -124 | 154 | -156 | -29 | 1,085 | 628 | 658 | -205 |
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| Net cash provided by/(used in) operating activities | 209 | -92 | 45 | 133 | 38 | -28 | 14 | -74 | 196 | 1,951 | 2,123 | -229 | -24 | 507 |
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| Collection of notes receivable | - | - | - | - | - | - | - | - | - | - | - | - | - | 5 |
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| Proceeds from stock sales of clearing organization memberships | - | - | - | - | - | - | - | - | - | - | 2 | 0 | - | - |
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| Cash paid for acquisitions of businesses and assets, net of cash acquired | 9 | 12 | - | - | 8 | 20 | 6 | 4 | 29 | 225 | 2 | 0 | 6 | 2 |
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| Purchase of exchange memberships and common stock | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 |
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| Purchase of property and equipment and internally developed software | 10 | 9 | 5 | 4 | 9 | 15 | 16 | 13 | 12 | 17 | 62 | 50 | 47 | 65 |
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| Net cash used in investing activities | -21 | -20 | 5 | -4 | -15 | -35 | -22 | -15 | -41 | -242 | -60 | -49 | -53 | -64 |
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| Net change in lenders under loans with maturities 90 days or less | - | - | - | - | - | - | - | - | -163 | 100 | -33 | 212 | -119 | -2 |
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| Proceeds from Short-Term Debt, Maturing in More than Three Months | - | - | - | - | - | - | - | - | 357 | 609 | 191 | 547 | 187 | 10 |
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| Repayments of lenders under loans with maturities greater than 90 days | - | - | - | - | - | - | - | - | 347 | 642 | 186 | 522 | 222 | 10 |
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| Repayments of senior secured term loan | - | - | - | - | - | - | - | - | - | 10 | 10 | 170 | - | - |
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| Proceeds from issuance of senior secured notes | - | - | 46 | - | - | - | - | - | - | - | - | - | - | 550 |
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| Repayment of senior secured notes | - | - | - | - | - | - | - | - | - | 92 | 2 | 1 | - | 348 |
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| Deferred payments on acquisitions | - | - | - | - | - | - | - | - | - | - | - | 3 | 19 | 10 |
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| Payment of contingent consideration | - | - | - | - | - | - | - | - | - | 1 | 2 | 4 | - | - |
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| Debt issuance costs | 2 | 0 | 4 | 0 | 0 | 2 | 0 | 0 | 3 | 15 | - | - | - | 8 |
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| Shares withheld to cover taxes on vesting of equity awards | - | - | - | - | - | - | - | 1 | - | - | - | - | - | 2 |
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| Exercise of stock options | 1 | 2 | 2 | 1 | 3 | 4 | 3 | 3 | 1 | 6 | 9 | 7 | 4 | 8 |
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| Net cash provided by/(used in) financing activities | -48 | 129 | -130 | -49 | 15 | 121 | 6 | 121 | 10 | 312 | -36 | 66 | -169 | 188 |
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| Effect of exchange rates on cash, segregated cash, cash equivalents, and segregated cash equivalents | - | - | - | - | - | - | - | - | - | - | 14 | -11 | 3 | -0 |
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| Net increase/(decrease) in cash, segregated cash, cash equivalents, and segregated cash equivalents | - | - | - | - | - | - | - | - | 164 | 2,017 | 2,041 | -224 | -243 | 631 |
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| Cash paid for interest | - | - | - | - | - | - | - | - | 153 | 90 | 87 | 149 | 787 | 1,230 |
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| Income Taxes Paid, Net | 18 | 6 | 10 | 3 | 15 | 9 | 17 | 22 | 25 | 44 | 52 | 56 | 71 | 118 |
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| Identified intangible assets and goodwill on acquisitions | - | - | - | - | - | - | - | - | - | - | - | - | 11 | 6 |
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| Additional consideration payable related to acquisitions | - | - | - | - | - | - | - | - | - | 22 | 4 | - | 11 | 4 |
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| Assets acquired | - | - | - | - | 1,011 | 187 | - | 2 | 47 | 1,169 | 7 | - | 142 | 1 |
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| Liabilities acquired | - | - | - | - | -995 | 136 | - | 2 | 9 | 360 | 4 | - | 84 | 1 |
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| Total net assets acquired | - | - | - | - | 16 | 51 | - | -0 | 38 | 810 | 2 | - | 58 | 0 |
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