Loans to Banking Clients and Related Allowance for Loan Losses (Credit Quality of Residential Real Estate Mortgages and HELOCs by Reviewing FICO Scores at Origination, Current FICO Scores, Loan-To-Value Ratio) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013		Dec. 31, 2012
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	$ 11,789	[1]	$ 10,782	[1]
Residential real estate mortgages, first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	7,301		6,348
Residential real estate mortgages, purchased first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	169		159
Residential real estate mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	7,470		6,507
Weighted Average Updated FICO	770		768
Percent of Loans that are 90+ Days Past Due and Less than 90 Days Past Due but on Nonaccrual Status	0.27%		0.38%
Home equity lines of credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	3,125		3,287
Weighted Average Updated FICO	767		767
Utilization Rate	40.00%	[2]	42.00%	[2]
Percent of Loans that are 90+ Days Past Due and Less than 90 Days Past Due but on Nonaccrual Status	0.22%		0.31%
Year of origination Pre 2009 [Member] | Residential real estate mortgages, first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	756		867
Year of origination Pre 2009 [Member] | Residential real estate mortgages, purchased first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	56		62
Year of origination Pre 2009 [Member] | Residential real estate mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	812		929
Year of origination Pre 2009 [Member] | Home equity lines of credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	2,172		2,338
Year of origination 2009 [Member] | Residential real estate mortgages, first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	238		305
Year of origination 2009 [Member] | Residential real estate mortgages, purchased first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	4		6
Year of origination 2009 [Member] | Residential real estate mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	242		311
Year of origination 2009 [Member] | Home equity lines of credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	292		338
Year of origination 2010 [Member] | Residential real estate mortgages, first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	644		909
Year of origination 2010 [Member] | Residential real estate mortgages, purchased first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	9		12
Year of origination 2010 [Member] | Residential real estate mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	653		921
Year of origination 2010 [Member] | Home equity lines of credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	215		249
Year of origination 2011 [Member] | Residential real estate mortgages, first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	912		1,270
Year of origination 2011 [Member] | Residential real estate mortgages, purchased first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	42		53
Year of origination 2011 [Member] | Residential real estate mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	954		1,323
Year of origination 2011 [Member] | Home equity lines of credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	175		198
Year of origination 2012 [Member] | Residential real estate mortgages, first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	2,731		2,997
Year of origination 2012 [Member] | Residential real estate mortgages, purchased first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	27		26
Year of origination 2012 [Member] | Residential real estate mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	2,758		3,023
Year of origination 2012 [Member] | Home equity lines of credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	172		164
Year of origination 2013 [Member] | Residential real estate mortgages, first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	2,020
Year of origination 2013 [Member] | Residential real estate mortgages, purchased first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	31
Year of origination 2013 [Member] | Residential real estate mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	2,051
Year of origination 2013 [Member] | Home equity lines of credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	99
Origination FICO Score Below 620 [Member] | Residential real estate mortgages, first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	10		10
Origination FICO Score Below 620 [Member] | Residential real estate mortgages, purchased first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	2		1
Origination FICO Score Below 620 [Member] | Residential real estate mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	12		11
Origination FICO Score 620 Through 679 [Member] | Residential real estate mortgages, first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	99		98
Origination FICO Score 620 Through 679 [Member] | Residential real estate mortgages, purchased first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	15		16
Origination FICO Score 620 Through 679 [Member] | Residential real estate mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	114		114
Origination FICO Score 620 Through 679 [Member] | Home equity lines of credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	21		23
Origination FICO Score 680 Through 739 [Member] | Residential real estate mortgages, first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	1,285		1,141
Origination FICO Score 680 Through 739 [Member] | Residential real estate mortgages, purchased first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	34		40
Origination FICO Score 680 Through 739 [Member] | Residential real estate mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	1,319		1,181
Origination FICO Score 680 Through 739 [Member] | Home equity lines of credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	599		633
Origination FICO Score 740 And Above [Member] | Residential real estate mortgages, first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	5,907		5,099
Origination FICO Score 740 And Above [Member] | Residential real estate mortgages, purchased first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	118		102
Origination FICO Score 740 And Above [Member] | Residential real estate mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	6,025		5,201
Origination FICO Score 740 And Above [Member] | Home equity lines of credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	2,505		2,631
Updated FICO Score Below 620 [Member] | Residential real estate mortgages, first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	50		54
Updated FICO Score Below 620 [Member] | Residential real estate mortgages, purchased first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	5		6
Updated FICO Score Below 620 [Member] | Residential real estate mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	55		60
Updated FICO Score Below 620 [Member] | Home equity lines of credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	44		49
Updated FICO Score 620 Through 679 [Member] | Residential real estate mortgages, first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	192		191
Updated FICO Score 620 Through 679 [Member] | Residential real estate mortgages, purchased first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	11		13
Updated FICO Score 620 Through 679 [Member] | Residential real estate mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	203		204
Updated FICO Score 620 Through 679 [Member] | Home equity lines of credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	111		117
Updated FICO Score 680 Through 739 [Member] | Residential real estate mortgages, first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	1,020		940
Updated FICO Score 680 Through 739 [Member] | Residential real estate mortgages, purchased first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	32		34
Updated FICO Score 680 Through 739 [Member] | Residential real estate mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	1,052		974
Updated FICO Score 680 Through 739 [Member] | Home equity lines of credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	488		510
Updated FICO Score 740 And Above [Member] | Residential real estate mortgages, first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	6,039		5,163
Updated FICO Score 740 And Above [Member] | Residential real estate mortgages, purchased first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	121		106
Updated FICO Score 740 And Above [Member] | Residential real estate mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	6,160		5,269
Updated FICO Score 740 And Above [Member] | Home equity lines of credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	2,482		2,611
Origination Loan To Value Ratio 70% And Below [Member] | Residential real estate mortgages, first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	4,900		4,189
Origination Loan To Value Ratio 70% And Below [Member] | Residential real estate mortgages, purchased first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	114		97
Origination Loan To Value Ratio 70% And Below [Member] | Residential real estate mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	5,014		4,286
Origination Loan To Value Ratio 70% And Below [Member] | Home equity lines of credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	2,101		2,225
Origination Loan to Value Ratio Greater Than 70% Through 90% [Member] | Residential real estate mortgages, first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	2,385		2,142
Origination Loan to Value Ratio Greater Than 70% Through 90% [Member] | Residential real estate mortgages, purchased first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	49		54
Origination Loan to Value Ratio Greater Than 70% Through 90% [Member] | Residential real estate mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	2,434		2,196
Origination Loan to Value Ratio Greater Than 70% Through 90% [Member] | Home equity lines of credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	999		1,036
Origination Loan to Value Ratio Greater Than 90% Through 100% [Member] | Residential real estate mortgages, first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	16		17
Origination Loan to Value Ratio Greater Than 90% Through 100% [Member] | Residential real estate mortgages, purchased first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	6		8
Origination Loan to Value Ratio Greater Than 90% Through 100% [Member] | Residential real estate mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	22		25
Origination Loan to Value Ratio Greater Than 90% Through 100% [Member] | Home equity lines of credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	25		26
Estimated Current LTV 70% And Below [Member] | Residential real estate mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	5,830		4,162
Weighted Average Updated FICO	773		772
Percent of Loans that are 90+ Days Past Due and Less than 90 Days Past Due but on Nonaccrual Status	0.04%		0.05%
Estimated Current LTV 70% And Below [Member] | Home equity lines of credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	1,945		1,559
Weighted Average Updated FICO	772		773
Utilization Rate	36.00%	[2]	36.00%	[2]
Percent of Loans that are 90+ Days Past Due and Less than 90 Days Past Due but on Nonaccrual Status	0.10%		0.14%
Estimated Current LTV Greater Than 70% through 90% [Member] | Residential real estate mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	1,355		1,841
Weighted Average Updated FICO	763		764
Percent of Loans that are 90+ Days Past Due and Less than 90 Days Past Due but on Nonaccrual Status	0.27%		0.22%
Estimated Current LTV Greater Than 70% through 90% [Member] | Home equity lines of credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	783		1,020
Weighted Average Updated FICO	764		766
Utilization Rate	48.00%	[2]	46.00%	[2]
Percent of Loans that are 90+ Days Past Due and Less than 90 Days Past Due but on Nonaccrual Status	0.24%		0.18%
Estimated Current LTV Greater Than 90% through 100% [Member] | Residential real estate mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	119		168
Weighted Average Updated FICO	744		750
Percent of Loans that are 90+ Days Past Due and Less than 90 Days Past Due but on Nonaccrual Status	0.88%		0.51%
Estimated Current LTV Greater Than 90% through 100% [Member] | Home equity lines of credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	173		267
Weighted Average Updated FICO	754		759
Utilization Rate	56.00%	[2]	54.00%	[2]
Percent of Loans that are 90+ Days Past Due and Less than 90 Days Past Due but on Nonaccrual Status	0.45%		0.44%
Estimated Current LTV Greater Than 100% [Member] | Residential real estate mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	166		336
Weighted Average Updated FICO	733		741
Percent of Loans that are 90+ Days Past Due and Less than 90 Days Past Due but on Nonaccrual Status	7.72%		5.34%
Estimated Current LTV Greater Than 100% [Member] | Home equity lines of credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	$ 224		$ 441
Weighted Average Updated FICO	747		753
Utilization Rate	59.00%	[2]	59.00%	[2]
Percent of Loans that are 90+ Days Past Due and Less than 90 Days Past Due but on Nonaccrual Status	0.95%		1.06%

[1] All loans are evaluated for impairment by loan segment.

[2] The Utilization Rate is calculated using the outstanding HELOC balance divided by the associated total line of credit.