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Loans to Banking Clients and Related Allowance for Loan Losses (Credit Quality of Residential Real Estate Mortgages and HELOCs by Reviewing FICO Scores at Origination, Current FICO Scores, Loan-To-Value Ratio) (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Financing Receivable, Recorded Investment [Line Items]    
Loans to banking clients $ 13,441us-gaap_LoansAndLeasesReceivableConsumerRealEstate [1] $ 12,467us-gaap_LoansAndLeasesReceivableConsumerRealEstate [1]
Residential real estate mortgages [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Loans to banking clients 8,127us-gaap_LoansAndLeasesReceivableConsumerRealEstate
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
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= schw_ResidentialRealEstateMortgageLoansMember
Weighted Average Updated FICO 773schw_FinancingReceivableCreditQualityWeightedAverageCreditRatingsUpdated
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= schw_ResidentialRealEstateMortgageLoansMember		 772schw_FinancingReceivableCreditQualityWeightedAverageCreditRatingsUpdated
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= schw_ResidentialRealEstateMortgageLoansMember
Percent of Loans that are on Nonaccrual Status 0.18%us-gaap_LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= schw_ResidentialRealEstateMortgageLoansMember		 0.26%us-gaap_LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= schw_ResidentialRealEstateMortgageLoansMember
Home equity lines of credit [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Loans to banking clients 2,955us-gaap_LoansAndLeasesReceivableConsumerRealEstate
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember		 3,041us-gaap_LoansAndLeasesReceivableConsumerRealEstate
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= us-gaap_HomeEquityMember
Weighted Average Updated FICO 769schw_FinancingReceivableCreditQualityWeightedAverageCreditRatingsUpdated
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember		 769schw_FinancingReceivableCreditQualityWeightedAverageCreditRatingsUpdated
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= us-gaap_HomeEquityMember
Utilization Rate 39.00%schw_FinancingReceivableCreditQualityUtilizationRate
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember		 [2] 39.00%schw_FinancingReceivableCreditQualityUtilizationRate
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= us-gaap_HomeEquityMember		 [2]
Percent of Loans that are on Nonaccrual Status 0.20%us-gaap_LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember		 0.24%us-gaap_LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember
Year of origination Pre 2010 [Member] | Residential real estate mortgages [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Loans to banking clients 749us-gaap_LoansAndLeasesReceivableConsumerRealEstate
/ schw_ExternalCreditAssessmentAxis
= schw_YearOfOriginationPreTwentyZeroTenMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= schw_ResidentialRealEstateMortgageLoansMember		 914us-gaap_LoansAndLeasesReceivableConsumerRealEstate
/ schw_ExternalCreditAssessmentAxis
= schw_YearOfOriginationPreTwentyZeroTenMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= schw_ResidentialRealEstateMortgageLoansMember
Year of origination Pre 2010 [Member] | Home equity lines of credit [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Loans to banking clients 2,076us-gaap_LoansAndLeasesReceivableConsumerRealEstate
/ schw_ExternalCreditAssessmentAxis
= schw_YearOfOriginationPreTwentyZeroTenMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember		 2,304us-gaap_LoansAndLeasesReceivableConsumerRealEstate
/ schw_ExternalCreditAssessmentAxis
= schw_YearOfOriginationPreTwentyZeroTenMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember
Year of origination 2010 [Member] | Residential real estate mortgages [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Loans to banking clients 370us-gaap_LoansAndLeasesReceivableConsumerRealEstate
/ schw_ExternalCreditAssessmentAxis
= schw_OriginationInTwentyTenMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
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= schw_OriginationInTwentyTenMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= schw_ResidentialRealEstateMortgageLoansMember
Year of origination 2010 [Member] | Home equity lines of credit [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Loans to banking clients 168us-gaap_LoansAndLeasesReceivableConsumerRealEstate
/ schw_ExternalCreditAssessmentAxis
= schw_OriginationInTwentyTenMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
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= us-gaap_HomeEquityMember
Year of origination 2011 [Member] | Residential real estate mortgages [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Loans to banking clients 588us-gaap_LoansAndLeasesReceivableConsumerRealEstate
/ schw_ExternalCreditAssessmentAxis
= schw_OriginationInTwentyElevenMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
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/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= schw_ResidentialRealEstateMortgageLoansMember
Year of origination 2011 [Member] | Home equity lines of credit [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Loans to banking clients 137us-gaap_LoansAndLeasesReceivableConsumerRealEstate
/ schw_ExternalCreditAssessmentAxis
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= us-gaap_HomeEquityMember
Year of origination 2012 [Member] | Residential real estate mortgages [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Loans to banking clients 2,107us-gaap_LoansAndLeasesReceivableConsumerRealEstate
/ schw_ExternalCreditAssessmentAxis
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/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= schw_ResidentialRealEstateMortgageLoansMember		 2,429us-gaap_LoansAndLeasesReceivableConsumerRealEstate
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/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= schw_ResidentialRealEstateMortgageLoansMember
Year of origination 2012 [Member] | Home equity lines of credit [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Loans to banking clients 147us-gaap_LoansAndLeasesReceivableConsumerRealEstate
/ schw_ExternalCreditAssessmentAxis
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= us-gaap_HomeEquityMember
Year of origination 2013 [Member] | Residential real estate mortgages [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Loans to banking clients 3,047us-gaap_LoansAndLeasesReceivableConsumerRealEstate
/ schw_ExternalCreditAssessmentAxis
= schw_OriginationInTwentyThirteenMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= schw_ResidentialRealEstateMortgageLoansMember		 3,382us-gaap_LoansAndLeasesReceivableConsumerRealEstate
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= schw_ResidentialRealEstateMortgageLoansMember
Year of origination 2013 [Member] | Home equity lines of credit [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Loans to banking clients 250us-gaap_LoansAndLeasesReceivableConsumerRealEstate
/ schw_ExternalCreditAssessmentAxis
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= schw_OriginationInTwentyThirteenMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember
Year of origination 2014 [Member] | Residential real estate mortgages [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Loans to banking clients 1,266us-gaap_LoansAndLeasesReceivableConsumerRealEstate
/ schw_ExternalCreditAssessmentAxis
= schw_YearOfOriginationTwentyFourteenMember
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= schw_ResidentialRealEstateMortgageLoansMember		  
Year of origination 2014 [Member] | Home equity lines of credit [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Loans to banking clients 177us-gaap_LoansAndLeasesReceivableConsumerRealEstate
/ schw_ExternalCreditAssessmentAxis
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/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember		  
Origination FICO Score Below 620 [Member] | Residential real estate mortgages [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Loans to banking clients 10us-gaap_LoansAndLeasesReceivableConsumerRealEstate
/ schw_ExternalCreditAssessmentAxis
= schw_OriginationFicoScoreBelowSixHundredTwentyMember
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= schw_OriginationFicoScoreBelowSixHundredTwentyMember
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= schw_ResidentialRealEstateMortgageLoansMember
Origination FICO Score 620 Through 679 [Member] | Residential real estate mortgages [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Loans to banking clients 97us-gaap_LoansAndLeasesReceivableConsumerRealEstate
/ schw_ExternalCreditAssessmentAxis
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= schw_ResidentialRealEstateMortgageLoansMember
Origination FICO Score 620 Through 679 [Member] | Home equity lines of credit [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Loans to banking clients 18us-gaap_LoansAndLeasesReceivableConsumerRealEstate
/ schw_ExternalCreditAssessmentAxis
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= us-gaap_HomeEquityMember
Origination FICO Score 680 Through 739 [Member] | Residential real estate mortgages [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Loans to banking clients 1,366us-gaap_LoansAndLeasesReceivableConsumerRealEstate
/ schw_ExternalCreditAssessmentAxis
= schw_OriginationFicoScoreSixHundredEightyThroughSevenHundredThirtyNineMember
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Origination FICO Score 680 Through 739 [Member] | Home equity lines of credit [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Loans to banking clients 549us-gaap_LoansAndLeasesReceivableConsumerRealEstate
/ schw_ExternalCreditAssessmentAxis
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Origination FICO Score 740 And Above [Member] | Residential real estate mortgages [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Loans to banking clients 6,654us-gaap_LoansAndLeasesReceivableConsumerRealEstate
/ schw_ExternalCreditAssessmentAxis
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Origination FICO Score 740 And Above [Member] | Home equity lines of credit [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Loans to banking clients 2,388us-gaap_LoansAndLeasesReceivableConsumerRealEstate
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Origination Loan To Value Ratio 70% And Below [Member] | Residential real estate mortgages [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Loans to banking clients 5,572us-gaap_LoansAndLeasesReceivableConsumerRealEstate
/ schw_ExternalCreditAssessmentAxis
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Origination Loan To Value Ratio 70% And Below [Member] | Home equity lines of credit [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Loans to banking clients 1,979us-gaap_LoansAndLeasesReceivableConsumerRealEstate
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Origination Loan to Value Ratio Greater Than 70% Through 90% [Member] | Residential real estate mortgages [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Loans to banking clients 2,538us-gaap_LoansAndLeasesReceivableConsumerRealEstate
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Origination Loan to Value Ratio Greater Than 70% Through 90% [Member] | Home equity lines of credit [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Loans to banking clients 955us-gaap_LoansAndLeasesReceivableConsumerRealEstate
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Origination Loan to Value Ratio Greater Than 90% Through 100% [Member] | Residential real estate mortgages [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Loans to banking clients 17us-gaap_LoansAndLeasesReceivableConsumerRealEstate
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Origination Loan to Value Ratio Greater Than 90% Through 100% [Member] | Home equity lines of credit [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Loans to banking clients 21us-gaap_LoansAndLeasesReceivableConsumerRealEstate
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Estimated Current LTV 70% And Below [Member] | Residential real estate mortgages [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Loans to banking clients 7,131us-gaap_LoansAndLeasesReceivableConsumerRealEstate
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Percent of Loans that are on Nonaccrual Status 0.04%us-gaap_LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans
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Estimated Current LTV 70% And Below [Member] | Home equity lines of credit [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Loans to banking clients 2,282us-gaap_LoansAndLeasesReceivableConsumerRealEstate
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Percent of Loans that are on Nonaccrual Status 0.08%us-gaap_LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans
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/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember
Estimated Current LTV Greater Than 70% through 90% [Member] | Residential real estate mortgages [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Loans to banking clients 882us-gaap_LoansAndLeasesReceivableConsumerRealEstate
/ schw_ExternalCreditAssessmentAxis
= schw_EstimatedCurrentLoanToValueRatioGreaterThanSeventyPercentThroughNinetyPercentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= schw_ResidentialRealEstateMortgageLoansMember		 1,181us-gaap_LoansAndLeasesReceivableConsumerRealEstate
/ schw_ExternalCreditAssessmentAxis
= schw_EstimatedCurrentLoanToValueRatioGreaterThanSeventyPercentThroughNinetyPercentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= schw_ResidentialRealEstateMortgageLoansMember
Weighted Average Updated FICO 765schw_FinancingReceivableCreditQualityWeightedAverageCreditRatingsUpdated
/ schw_ExternalCreditAssessmentAxis
= schw_EstimatedCurrentLoanToValueRatioGreaterThanSeventyPercentThroughNinetyPercentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= schw_ResidentialRealEstateMortgageLoansMember		 763schw_FinancingReceivableCreditQualityWeightedAverageCreditRatingsUpdated
/ schw_ExternalCreditAssessmentAxis
= schw_EstimatedCurrentLoanToValueRatioGreaterThanSeventyPercentThroughNinetyPercentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= schw_ResidentialRealEstateMortgageLoansMember
Percent of Loans that are on Nonaccrual Status 0.50%us-gaap_LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans
/ schw_ExternalCreditAssessmentAxis
= schw_EstimatedCurrentLoanToValueRatioGreaterThanSeventyPercentThroughNinetyPercentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= schw_ResidentialRealEstateMortgageLoansMember		 0.34%us-gaap_LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans
/ schw_ExternalCreditAssessmentAxis
= schw_EstimatedCurrentLoanToValueRatioGreaterThanSeventyPercentThroughNinetyPercentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= schw_ResidentialRealEstateMortgageLoansMember
Estimated Current LTV Greater Than 70% through 90% [Member] | Home equity lines of credit [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Loans to banking clients 526us-gaap_LoansAndLeasesReceivableConsumerRealEstate
/ schw_ExternalCreditAssessmentAxis
= schw_EstimatedCurrentLoanToValueRatioGreaterThanSeventyPercentThroughNinetyPercentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
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/ schw_ExternalCreditAssessmentAxis
= schw_EstimatedCurrentLoanToValueRatioGreaterThanSeventyPercentThroughNinetyPercentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember
Weighted Average Updated FICO 762schw_FinancingReceivableCreditQualityWeightedAverageCreditRatingsUpdated
/ schw_ExternalCreditAssessmentAxis
= schw_EstimatedCurrentLoanToValueRatioGreaterThanSeventyPercentThroughNinetyPercentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember		 762schw_FinancingReceivableCreditQualityWeightedAverageCreditRatingsUpdated
/ schw_ExternalCreditAssessmentAxis
= schw_EstimatedCurrentLoanToValueRatioGreaterThanSeventyPercentThroughNinetyPercentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember
Utilization Rate 48.00%schw_FinancingReceivableCreditQualityUtilizationRate
/ schw_ExternalCreditAssessmentAxis
= schw_EstimatedCurrentLoanToValueRatioGreaterThanSeventyPercentThroughNinetyPercentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember		 [2] 48.00%schw_FinancingReceivableCreditQualityUtilizationRate
/ schw_ExternalCreditAssessmentAxis
= schw_EstimatedCurrentLoanToValueRatioGreaterThanSeventyPercentThroughNinetyPercentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember		 [2]
Percent of Loans that are on Nonaccrual Status 0.34%us-gaap_LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans
/ schw_ExternalCreditAssessmentAxis
= schw_EstimatedCurrentLoanToValueRatioGreaterThanSeventyPercentThroughNinetyPercentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember		 0.22%us-gaap_LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans
/ schw_ExternalCreditAssessmentAxis
= schw_EstimatedCurrentLoanToValueRatioGreaterThanSeventyPercentThroughNinetyPercentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember
Estimated Current LTV Greater Than 90% through 100% [Member] | Residential real estate mortgages [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Loans to banking clients 61us-gaap_LoansAndLeasesReceivableConsumerRealEstate
/ schw_ExternalCreditAssessmentAxis
= schw_EstimatedCurrentLoanToValueRatioGreaterThanNinetyPercentThroughOneHundredPercentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= schw_ResidentialRealEstateMortgageLoansMember		 86us-gaap_LoansAndLeasesReceivableConsumerRealEstate
/ schw_ExternalCreditAssessmentAxis
= schw_EstimatedCurrentLoanToValueRatioGreaterThanNinetyPercentThroughOneHundredPercentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= schw_ResidentialRealEstateMortgageLoansMember
Weighted Average Updated FICO 740schw_FinancingReceivableCreditQualityWeightedAverageCreditRatingsUpdated
/ schw_ExternalCreditAssessmentAxis
= schw_EstimatedCurrentLoanToValueRatioGreaterThanNinetyPercentThroughOneHundredPercentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= schw_ResidentialRealEstateMortgageLoansMember		 732schw_FinancingReceivableCreditQualityWeightedAverageCreditRatingsUpdated
/ schw_ExternalCreditAssessmentAxis
= schw_EstimatedCurrentLoanToValueRatioGreaterThanNinetyPercentThroughOneHundredPercentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= schw_ResidentialRealEstateMortgageLoansMember
Percent of Loans that are on Nonaccrual Status 2.95%us-gaap_LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans
/ schw_ExternalCreditAssessmentAxis
= schw_EstimatedCurrentLoanToValueRatioGreaterThanNinetyPercentThroughOneHundredPercentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= schw_ResidentialRealEstateMortgageLoansMember		 4.77%us-gaap_LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans
/ schw_ExternalCreditAssessmentAxis
= schw_EstimatedCurrentLoanToValueRatioGreaterThanNinetyPercentThroughOneHundredPercentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= schw_ResidentialRealEstateMortgageLoansMember
Estimated Current LTV Greater Than 90% through 100% [Member] | Home equity lines of credit [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Loans to banking clients 81us-gaap_LoansAndLeasesReceivableConsumerRealEstate
/ schw_ExternalCreditAssessmentAxis
= schw_EstimatedCurrentLoanToValueRatioGreaterThanNinetyPercentThroughOneHundredPercentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember		 127us-gaap_LoansAndLeasesReceivableConsumerRealEstate
/ schw_ExternalCreditAssessmentAxis
= schw_EstimatedCurrentLoanToValueRatioGreaterThanNinetyPercentThroughOneHundredPercentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember
Weighted Average Updated FICO 749schw_FinancingReceivableCreditQualityWeightedAverageCreditRatingsUpdated
/ schw_ExternalCreditAssessmentAxis
= schw_EstimatedCurrentLoanToValueRatioGreaterThanNinetyPercentThroughOneHundredPercentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember		 752schw_FinancingReceivableCreditQualityWeightedAverageCreditRatingsUpdated
/ schw_ExternalCreditAssessmentAxis
= schw_EstimatedCurrentLoanToValueRatioGreaterThanNinetyPercentThroughOneHundredPercentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember
Utilization Rate 61.00%schw_FinancingReceivableCreditQualityUtilizationRate
/ schw_ExternalCreditAssessmentAxis
= schw_EstimatedCurrentLoanToValueRatioGreaterThanNinetyPercentThroughOneHundredPercentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember		 [2] 59.00%schw_FinancingReceivableCreditQualityUtilizationRate
/ schw_ExternalCreditAssessmentAxis
= schw_EstimatedCurrentLoanToValueRatioGreaterThanNinetyPercentThroughOneHundredPercentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember		 [2]
Percent of Loans that are on Nonaccrual Status 1.67%us-gaap_LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans
/ schw_ExternalCreditAssessmentAxis
= schw_EstimatedCurrentLoanToValueRatioGreaterThanNinetyPercentThroughOneHundredPercentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember		 1.22%us-gaap_LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans
/ schw_ExternalCreditAssessmentAxis
= schw_EstimatedCurrentLoanToValueRatioGreaterThanNinetyPercentThroughOneHundredPercentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember
Estimated Current LTV Greater Than 100% [Member] | Residential real estate mortgages [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Loans to banking clients 53us-gaap_LoansAndLeasesReceivableConsumerRealEstate
/ schw_ExternalCreditAssessmentAxis
= schw_EstimatedCurrentLoanToValueRatioGreaterThanOneHundredPercentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= schw_ResidentialRealEstateMortgageLoansMember		 90us-gaap_LoansAndLeasesReceivableConsumerRealEstate
/ schw_ExternalCreditAssessmentAxis
= schw_EstimatedCurrentLoanToValueRatioGreaterThanOneHundredPercentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= schw_ResidentialRealEstateMortgageLoansMember
Weighted Average Updated FICO 726schw_FinancingReceivableCreditQualityWeightedAverageCreditRatingsUpdated
/ schw_ExternalCreditAssessmentAxis
= schw_EstimatedCurrentLoanToValueRatioGreaterThanOneHundredPercentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= schw_ResidentialRealEstateMortgageLoansMember		 730schw_FinancingReceivableCreditQualityWeightedAverageCreditRatingsUpdated
/ schw_ExternalCreditAssessmentAxis
= schw_EstimatedCurrentLoanToValueRatioGreaterThanOneHundredPercentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= schw_ResidentialRealEstateMortgageLoansMember
Percent of Loans that are on Nonaccrual Status 10.95%us-gaap_LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans
/ schw_ExternalCreditAssessmentAxis
= schw_EstimatedCurrentLoanToValueRatioGreaterThanOneHundredPercentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= schw_ResidentialRealEstateMortgageLoansMember		 10.50%us-gaap_LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans
/ schw_ExternalCreditAssessmentAxis
= schw_EstimatedCurrentLoanToValueRatioGreaterThanOneHundredPercentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= schw_ResidentialRealEstateMortgageLoansMember
Estimated Current LTV Greater Than 100% [Member] | Home equity lines of credit [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Loans to banking clients $ 66us-gaap_LoansAndLeasesReceivableConsumerRealEstate
/ schw_ExternalCreditAssessmentAxis
= schw_EstimatedCurrentLoanToValueRatioGreaterThanOneHundredPercentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember		 $ 123us-gaap_LoansAndLeasesReceivableConsumerRealEstate
/ schw_ExternalCreditAssessmentAxis
= schw_EstimatedCurrentLoanToValueRatioGreaterThanOneHundredPercentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember
Weighted Average Updated FICO 742schw_FinancingReceivableCreditQualityWeightedAverageCreditRatingsUpdated
/ schw_ExternalCreditAssessmentAxis
= schw_EstimatedCurrentLoanToValueRatioGreaterThanOneHundredPercentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember		 743schw_FinancingReceivableCreditQualityWeightedAverageCreditRatingsUpdated
/ schw_ExternalCreditAssessmentAxis
= schw_EstimatedCurrentLoanToValueRatioGreaterThanOneHundredPercentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember
Utilization Rate 63.00%schw_FinancingReceivableCreditQualityUtilizationRate
/ schw_ExternalCreditAssessmentAxis
= schw_EstimatedCurrentLoanToValueRatioGreaterThanOneHundredPercentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember		 [2] 63.00%schw_FinancingReceivableCreditQualityUtilizationRate
/ schw_ExternalCreditAssessmentAxis
= schw_EstimatedCurrentLoanToValueRatioGreaterThanOneHundredPercentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember		 [2]
Percent of Loans that are on Nonaccrual Status 1.54%us-gaap_LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans
/ schw_ExternalCreditAssessmentAxis
= schw_EstimatedCurrentLoanToValueRatioGreaterThanOneHundredPercentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember		 1.34%us-gaap_LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans
/ schw_ExternalCreditAssessmentAxis
= schw_EstimatedCurrentLoanToValueRatioGreaterThanOneHundredPercentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_HomeEquityMember
[1] Loans are evaluated for impairment by loan segment.
[2] The Utilization Rate is calculated using the outstanding HELOC balance divided by the associated total line of credit.