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Segment Information - Additional Information (Detail)
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12 Months Ended | ||
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Dec. 31, 2012
Segment
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Dec. 31, 2011
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Dec. 31, 2010
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| Segment Reporting Information [Line Items] | |||
| Number of reportable segments | 2 | ||
| Clients, except for Schwab proprietary mutual funds, that accounted for more than 10% of the Company's net revenues | Except for Schwab's proprietary mutual funds, which are considered a single client for purposes of this computation, no single client accounted for more than 10% of the Company's net revenues in 2012, 2011, or 2010 | Except for Schwab's proprietary mutual funds, which are considered a single client for purposes of this computation, no single client accounted for more than 10% of the Company's net revenues in 2012, 2011, or 2010 | Except for Schwab's proprietary mutual funds, which are considered a single client for purposes of this computation, no single client accounted for more than 10% of the Company's net revenues in 2012, 2011, or 2010 |
| Realignment date of reportable segments as a result of recent organizational changes | In the first quarter of 2013 | ||
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Schwab Funds money market funds
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| Segment Reporting Information [Line Items] | |||
| Fees received from Schwab's proprietary mutual funds as a percentage of net revenues | 10.00% | 10.00% | 14.00% |
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California State
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| Segment Reporting Information [Line Items] | |||
| Percentage of Schwab's total client accounts located in California | 23.00% | 23.00% | 23.00% |