Regulatory Requirements (Net Capital and Net Capital Requirements for Schwab and optionsXpress, Inc) (Details) (USD $)	Dec. 31, 2014
Schwab [Member]
Compliance with Regulatory Capital Requirements for Broker Dealers [Line Items]
Net Capital	$ 1,550,000,000
% of Aggregate Debit Balances	10.00%
Minimum Net Capital Required	250,000
2% of Aggregate Debit Balances	324,000,000
Net Capital in Excess of Required Net Capital	1,226,000,000
Net Capital in Excess of 5% of Aggregate Debit Balances	739,000,000
OptionsXpress, Inc. [Member]
Compliance with Regulatory Capital Requirements for Broker Dealers [Line Items]
Net Capital	123,000,000
% of Aggregate Debit Balances	38.00%
Minimum Net Capital Required	1,000,000
2% of Aggregate Debit Balances	6,000,000
Net Capital in Excess of Required Net Capital	117,000,000
Net Capital in Excess of 5% of Aggregate Debit Balances	$ 107,000,000