Performance Bonds and Guaranty Fund Contributions (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||||
|---|---|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
Dec. 31, 2025 |
Dec. 31, 2024 |
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| Guarantor Obligations [Line Items] | ||||||
| Cash account at the Federal Reserve Bank | $ 157,381.7 | $ 151,494.5 | $ 157,381.7 | $ 151,494.5 | $ 164,079.5 | $ 101,794.1 |
| Revenues | 1,737.3 | 1,537.6 | 5,323.6 | 4,871.9 | ||
| Distribution of interest earned on collateral reinvestments | (1,264.0) | (1,396.6) | (3,774.1) | (3,571.4) | ||
| Average daily clearing settlement | 8,200.0 | |||||
| Interest from Performance Bonds | ||||||
| Guarantor Obligations [Line Items] | ||||||
| Revenues | 1,391.7 | 1,514.1 | 4,151.5 | 3,875.3 | ||
| Expense related to Performance Bonds | ||||||
| Guarantor Obligations [Line Items] | ||||||
| Distribution of interest earned on collateral reinvestments | 1,269.0 | $ 1,399.2 | 3,783.9 | $ 3,578.5 | ||
| Federal Reserve Bank Advances | ||||||
| Guarantor Obligations [Line Items] | ||||||
| Cash account at the Federal Reserve Bank | $ 139,100.0 | $ 139,100.0 | ||||
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- Definition Average Daily Clearing Settlement No definition available.
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- Definition Amount of cash and cash equivalent, and cash and cash equivalent restricted to withdrawal or usage; attributable to continuing operation. Cash includes, but is not limited to, currency on hand, demand deposit with financial institution, and account with general characteristic of demand deposit. Cash equivalent includes, but is not limited to, short-term, highly liquid investment that is both readily convertible to known amount of cash and so near maturity that it presents insignificant risk of change in value because of change in interest rate. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of income (expense) related to nonoperating activities, classified as other. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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