Loans to Banking Clients and Related Allowance for Loan Losses (Narrative) (Details) (USD $)			3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014 First Mortgage [Member]	Jun. 30, 2013 First Mortgage [Member]	Jun. 30, 2014 First Mortgage [Member]	Jun. 30, 2013 First Mortgage [Member]	Jun. 30, 2014 Home equity lines of credit [Member]	Jun. 30, 2013 Home equity lines of credit [Member]	Jun. 30, 2014 Home equity lines of credit [Member]	Jun. 30, 2013 Home equity lines of credit [Member]
Loans Receivable [Line Items]
Commitments to extend credit related to unused home equity lines of credit, personal loans secured by securities, and other lines of credit	$ 6,000,000,000	$ 5,700,000,000
Total nonaccrual loans	37,000,000	48,000,000
Loans accruing interest contractually 90 days or more past due	0	0
Nonperforming assets, including nonaccrual loans and other real estate owned	44,000,000	53,000,000
Purchased first mortgages and HELOCs			$ 332,000,000	$ 928,000,000	$ 618,000,000	$ 2,200,000,000	$ 175,000,000	$ 221,000,000	$ 347,000,000	$ 439,000,000