Summary of Significant Accounting Policies (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Land, Buildings, Equipment and Software
Land, buildings, equipment and software, net of accumulated depreciation	$ 705,000,000	$ 753,000,000
Accumulated depreciation	1,300,000,000	1,200,000,000
Depreciation and amortization expense for the year	144,000,000	152,000,000	143,000,000
Deferred Tax Assets, Valuation Allowance	19,000,000	16,000,000
Principles of Consolidation
Minimum percentage of voting interest required to be held to consolidate an entity	50.00%
Maximum percentage of voting interest required to be held to be accounted for, under the cost method	20.00%
Financing Receivables
Period of non payment after which a loan is placed on nonaccrual status	90 days
Period for charging off revolving unsecured consumer lines	180 days
Period for charging off closed-end consumer loans, other than loans secured by one to four family properties		120 days
Restricted and segregated cash and investments
Restricted Cash and Cash Equivalents	27,000,000	107,000,000
Amounts segregated under federal and other regulations	$ 2,300,000,000	$ 2,400,000,000
Maximum
Land, Buildings, Equipment and Software
Amortization periods	39 years
Principles of Consolidation
Percentage of voting interest required to be held to be accounted for under the equity method	50.00%
Minimum
Land, Buildings, Equipment and Software
Amortization periods	3 years
Principles of Consolidation
Percentage of voting interest required to be held to be accounted for under the equity method	20.00%