Regulatory Requirements (Net Capital and Net Capital Requirements for Schwab and optionsXpress, Inc) (Details) (USD $)	Sep. 30, 2014
Schwab [Member]
Compliance with Regulatory Capital Requirements for Broker Dealers [Line Items]
Net Capital	$ 1,589,000,000
% 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	1,265,000,000
Net Capital in Excess of 5% of Aggregate Debit Balances	778,000,000
OptionsXpress, Inc. [Member]
Compliance with Regulatory Capital Requirements for Broker Dealers [Line Items]
Net Capital	121,000,000
% of Aggregate Debit Balances	33.00%
Minimum Net Capital Required	1,000,000
2% of Aggregate Debit Balances	7,000,000
Net Capital in Excess of Required Net Capital	114,000,000
Net Capital in Excess of 5% of Aggregate Debit Balances	$ 103,000,000