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	Mar. 31, 2014		Dec. 31, 2013
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	$ 12,639		$ 12,467
Residential real estate mortgages, first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	7,889		7,845
Residential real estate mortgages, purchased first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	161		161
Residential real estate mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	8,050		8,006
Weighted Average Updated FICO	774		772
Percent of Loans that are on Nonaccrual Status	0.24%		0.26%
Home equity lines of credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	3,018		3,041
Weighted Average Updated FICO	770		769
Utilization Rate	39.00%	[1]	39.00%	[1]
Percent of Loans that are on Nonaccrual Status	0.20%		0.24%
Year of origination Pre 2010 [Member] | Residential real estate mortgages, first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	818		859
Year of origination Pre 2010 [Member] | Residential real estate mortgages, purchased first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	53		55
Year of origination Pre 2010 [Member] | Residential real estate mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	871		914
Year of origination Pre 2010 [Member] | Home equity lines of credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	2,246		2,304
Year of origination 2010 [Member] | Residential real estate mortgages, first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	479		503
Year of origination 2010 [Member] | Residential real estate mortgages, purchased first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	7		7
Year of origination 2010 [Member] | Residential real estate mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	486		510
Year of origination 2010 [Member] | Home equity lines of credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	189		191
Year of origination 2011 [Member] | Residential real estate mortgages, first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	694		733
Year of origination 2011 [Member] | Residential real estate mortgages, purchased first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	36		38
Year of origination 2011 [Member] | Residential real estate mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	730		771
Year of origination 2011 [Member] | Home equity lines of credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	151		155
Year of origination 2012 [Member] | Residential real estate mortgages, first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	2,333		2,403
Year of origination 2012 [Member] | Residential real estate mortgages, purchased first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	26		26
Year of origination 2012 [Member] | Residential real estate mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	2,359		2,429
Year of origination 2012 [Member] | Home equity lines of credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	157		162
Year of origination 2013 [Member] | Residential real estate mortgages, first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	3,304		3,347
Year of origination 2013 [Member] | Residential real estate mortgages, purchased first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	36		35
Year of origination 2013 [Member] | Residential real estate mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	3,340		3,382
Year of origination 2013 [Member] | Home equity lines of credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	239		229
Year of origination 2014 [Member] | Residential real estate mortgages, first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	261
Year of origination 2014 [Member] | Residential real estate mortgages, purchased first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	3
Year of origination 2014 [Member] | Residential real estate mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	264
Year of origination 2014 [Member] | Home equity lines of credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	36
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	1		1
Origination FICO Score Below 620 [Member] | Residential real estate mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	11		11
Origination FICO Score Below 620 [Member] | Home equity lines of credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	1
Origination FICO Score 620 Through 679 [Member] | Residential real estate mortgages, first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	94		96
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	13		14
Origination FICO Score 620 Through 679 [Member] | Residential real estate mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	107		110
Origination FICO Score 620 Through 679 [Member] | Home equity lines of credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	19		20
Origination FICO Score 680 Through 739 [Member] | Residential real estate mortgages, first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	1,361		1,352
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	32		32
Origination FICO Score 680 Through 739 [Member] | Residential real estate mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	1,393		1,384
Origination FICO Score 680 Through 739 [Member] | Home equity lines of credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	571		576
Origination FICO Score 740 And Above [Member] | Residential real estate mortgages, first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	6,424		6,387
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	115		114
Origination FICO Score 740 And Above [Member] | Residential real estate mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	6,539		6,501
Origination FICO Score 740 And Above [Member] | Home equity lines of credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	2,427		2,445
Updated FICO Score Below 620 [Member] | Residential real estate mortgages, first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	54		50
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		5
Updated FICO Score Below 620 [Member] | Residential real estate mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	59		55
Updated FICO Score Below 620 [Member] | Home equity lines of credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	38		42
Updated FICO Score 620 Through 679 [Member] | Residential real estate mortgages, first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	188		209
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	8		10
Updated FICO Score 620 Through 679 [Member] | Residential real estate mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	196		219
Updated FICO Score 620 Through 679 [Member] | Home equity lines of credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	111		106
Updated FICO Score 680 Through 739 [Member] | Residential real estate mortgages, first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	1,017		1,012
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	27		29
Updated FICO Score 680 Through 739 [Member] | Residential real estate mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	1,044		1,041
Updated FICO Score 680 Through 739 [Member] | Home equity lines of credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	447		453
Updated FICO Score 740 And Above [Member] | Residential real estate mortgages, first mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	6,630		6,574
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		117
Updated FICO Score 740 And Above [Member] | Residential real estate mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	6,751		6,691
Updated FICO Score 740 And Above [Member] | Home equity lines of credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	2,422		2,440
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	5,352		5,306
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	111		110
Origination Loan To Value Ratio 70% And Below [Member] | Residential real estate mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	5,463		5,416
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	2,017		2,040
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	2,521		2,523
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	45		45
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	2,566		2,568
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	977		977
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		16
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	5		6
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	21		22
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	24		24
Estimated Current LTV 70% And Below [Member] | Residential real estate mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	6,742		6,649
Weighted Average Updated FICO	776		775
Percent of Loans that are on Nonaccrual Status	0.06%		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	2,146		2,127
Weighted Average Updated FICO	774		773
Utilization Rate	36.00%	[1]	36.00%	[1]
Percent of Loans that are on Nonaccrual Status	0.06%		0.13%
Estimated Current LTV Greater Than 70% through 90% [Member] | Residential real estate mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	1,140		1,181
Weighted Average Updated FICO	765		763
Percent of Loans that are on Nonaccrual Status	0.28%		0.34%
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	651		664
Weighted Average Updated FICO	764		762
Utilization Rate	47.00%	[1]	48.00%	[1]
Percent of Loans that are on Nonaccrual Status	0.28%		0.22%
Estimated Current LTV Greater Than 90% through 100% [Member] | Residential real estate mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	77		86
Weighted Average Updated FICO	739		732
Percent of Loans that are on Nonaccrual Status	2.53%		4.77%
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	116		127
Weighted Average Updated FICO	754		752
Utilization Rate	59.00%	[1]	59.00%	[1]
Percent of Loans that are on Nonaccrual Status	0.47%		1.22%
Estimated Current LTV Greater Than 100% [Member] | Residential real estate mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	91		90
Weighted Average Updated FICO	728		730
Percent of Loans that are on Nonaccrual Status	11.43%		10.50%
Estimated Current LTV Greater Than 100% [Member] | Home equity lines of credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	$ 105		$ 123
Weighted Average Updated FICO	743		743
Utilization Rate	61.00%	[1]	63.00%	[1]
Percent of Loans that are on Nonaccrual Status	2.23%		1.34%

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