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Financial Instruments Subject to Off-Balance Sheet Credit Risk - Summary of the Fair Value of Client Securities Available to Utilize as Collateral and Amounts Pledged (Details) - USD ($) $ in Millions | Jun. 30, 2025 | Dec. 31, 2024
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Securities Financing Transaction [Line Items] |  |
Fair value of client securities available to be pledged | $ 115,551 | $ 116,258
Total collateral pledged to third parties | 56,703 | 42,090
Fulfillment of requirements with the Options Clearing Corporation |  |
Securities Financing Transaction [Line Items] |  |
Total collateral pledged to third parties | 30,463 | 24,011
Fulfillment of client short sales |  |
Securities Financing Transaction [Line Items] |  |
Total collateral pledged to third parties | 8,820 | 5,179
Securities lending to other broker-dealers |  |
Securities Financing Transaction [Line Items] |  |
Total collateral pledged to third parties | 16,855 | 12,282
Collateral for secured short-term borrowings |  |
Securities Financing Transaction [Line Items] |  |
Total collateral pledged to third parties | 565 | 618
Fully Paid Client Securities |  |
Securities Financing Transaction [Line Items] |  |
Total collateral pledged to third parties | $ 324 | $ 105

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- Definition Fair value of collateral permitted, by contact or custom, to be sold or re-pledged. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 50 -Paragraph 1A -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481420/860-30-50-1A + Details
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- Definition Fair value of the collateral, or portion thereof, that has been re-pledged, delivered, or otherwise used. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1A -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481420/860-30-50-1A + Details
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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. + References No definition available. + Details
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