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Earnings Per Common Share - Narrative (Details)	Dec. 31, 2023 stockClass
Earnings Per Share [Abstract]
Number of common stock classes	2

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- Definition

Number Of Classes Of Common Stock

+ References

No definition available.

+ Details

Name:	schw_NumberOfClassesOfCommonStock
Namespace Prefix:	schw_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

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- References

No definition available.

+ Details

Name:	us-gaap_EarningsPerShareAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration