Revenue (Contract Balances with Customer) (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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| Capitalized Contract Cost [Line Items] | ||||||
| Contract with Customer, Asset, after Allowance for Credit Loss | $ 591 | $ 344 | $ 591 | $ 344 | $ 480 | $ 288 |
| Receivable from Customer in Brokerage | 3,600 | 1,246 | 3,600 | 1,246 | 1,686 | 1,084 |
| Increase (Decrease) in Contract with Customer, Asset | 111 | 56 | ||||
| Contract with Customer, Liability | 123 | 37 | 123 | 37 | $ 125 | $ 39 |
| Additions | 79 | 17 | ||||
| Revenue recognized | (81) | (19) | ||||
| Capitalized Contract Cost, Amortization | $ 17 | $ 9 | 51 | 28 | ||
| Increase (Decrease) in Accounts Receivable from Contracts with Customer | $ 1,914 | $ 162 | ||||
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- Definition Increase (Decrease) in Accounts Receivable from Contracts with Customer No definition available.
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- Definition Amount of amortization expense for asset recognized from cost incurred to obtain or fulfill contract with customer. 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, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of deferred revenue recognized for transactions arising during the current reporting period. Deferred revenue is a liability as of the balance sheet date related to a revenue producing activity for which revenue has not yet been recognized. Generally, an Entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP. No definition available.
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- Definition Amount of revenue recognized that was previously reported as deferred or unearned revenue. No definition available.
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- Definition Amount of increase (decrease) in right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount due from customers for fees and charges arising from transactions related to the entity's brokerage activities and operations. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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