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v3.25.3

Fair Values of Assets and Liabilities - Narrative (Details) | 9 Months Ended
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Sep. 30, 2025 third_party_pricing_source
Fair Value Disclosures [Abstract] |
Number of third-party sources | 3

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- Definition Fair Value Measurements, Number Of Third-Party Pricing Sources + References No definition available. + Details
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Namespace Prefix: | schw_
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Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_FairValueDisclosuresAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration