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Commitments and Contingencies (Narrative) (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Commitments and Contingencies Disclosure [Line Items]      
Rent expense $ 214,000,000us-gaap_LeaseAndRentalExpense $ 208,000,000us-gaap_LeaseAndRentalExpense $ 203,000,000us-gaap_LeaseAndRentalExpense
Standby letters of credit [Member]      
Commitments and Contingencies Disclosure [Line Items]      
Aggregate face amount of letter of credit agreements 240,000,000us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity
/ us-gaap_CreditFacilityAxis
= us-gaap_StandbyLettersOfCreditMember
   
Bond Market Fund Litigation [Member]      
Commitments and Contingencies Disclosure [Line Items]      
Alleged minimum percentage of fund assets invested in CMOs and mortgage-backed securities without obtaining shareholder vote 25.00%schw_MinimumPercentageOfFundAssets
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= schw_BondMarketFundLitigationMember
   
Margin Requirements [Member]      
Commitments and Contingencies Disclosure [Line Items]      
Funds drawn under LOC's $ 0us-gaap_LineOfCredit
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= schw_MarginRequirementsMember