Credit Quality of Residential Real Estate Mortgages and HELOCs by Reviewing FICO Scores at Origination, Current FICO Scores, Loan-To-Value Ratio (Detail) (USD $) In Millions	Sep. 30, 2011		Dec. 31, 2010
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	$ 9,753	[1]	$ 8,778	[1]
Residential real estate mortgages, originated first mortgages
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	5,355	[2]	4,588	[3]
Residential real estate mortgages, originated first mortgages | Year of origination Pre 2007
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	303		352
Residential real estate mortgages, originated first mortgages | Year of origination 2007
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	303		384
Residential real estate mortgages, originated first mortgages | Year of origination 2008
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	574		728
Residential real estate mortgages, originated first mortgages | Year of origination 2009
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	644		884
Residential real estate mortgages, originated first mortgages | Year of origination 2010
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	1,957		2,240
Residential real estate mortgages, originated first mortgages | Year of origination 2011
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	1,574
Residential real estate mortgages, originated first mortgages | Origination FICO Score Below 620
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	10		9
Residential real estate mortgages, originated first mortgages | Origination FICO Score 620 Through 679
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	115		115
Residential real estate mortgages, originated first mortgages | Origination FICO Score 680 Through 739
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	1,030		907
Residential real estate mortgages, originated first mortgages | Origination FICO Score 740 And Above
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	4,200		3,557
Residential real estate mortgages, originated first mortgages | Updated FICO Score Below 620
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	59		63
Residential real estate mortgages, originated first mortgages | Updated FICO Score 620 Through 679
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	158		147
Residential real estate mortgages, originated first mortgages | Updated FICO Score 680 Through 739
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	798		730
Residential real estate mortgages, originated first mortgages | Updated FICO Score 740 And Above
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	4,340		3,648
Residential real estate mortgages, originated first mortgages | Origination Loan To Value Ratio 70 Percent And Below
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	3,435	[2]	2,911	[3]
Residential real estate mortgages, originated first mortgages | Origination Loan to Value Ratio 71 Percent Through 89 Percent
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	1,893	[2]	1,659	[3]
Residential real estate mortgages, originated first mortgages | Origination Loan to Value Ratio 90 Percent And Above
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	27	[2]	18	[3]
Residential real estate mortgages, purchased first mortgages
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	150	[2]	107	[3]
Residential real estate mortgages, purchased first mortgages | Year of origination Pre 2007
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	53		58
Residential real estate mortgages, purchased first mortgages | Year of origination 2007
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	8		9
Residential real estate mortgages, purchased first mortgages | Year of origination 2008
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	7		8
Residential real estate mortgages, purchased first mortgages | Year of origination 2009
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	11		12
Residential real estate mortgages, purchased first mortgages | Year of origination 2010
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	19		20
Residential real estate mortgages, purchased first mortgages | Year of origination 2011
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	52
Residential real estate mortgages, purchased first mortgages | Origination FICO Score Below 620
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	2		2
Residential real estate mortgages, purchased first mortgages | Origination FICO Score 620 Through 679
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	19		15
Residential real estate mortgages, purchased first mortgages | Origination FICO Score 680 Through 739
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	42		33
Residential real estate mortgages, purchased first mortgages | Origination FICO Score 740 And Above
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	87		57
Residential real estate mortgages, purchased first mortgages | Updated FICO Score Below 620
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	8		9
Residential real estate mortgages, purchased first mortgages | Updated FICO Score 620 Through 679
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	10		8
Residential real estate mortgages, purchased first mortgages | Updated FICO Score 680 Through 739
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	38		29
Residential real estate mortgages, purchased first mortgages | Updated FICO Score 740 And Above
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	94		61
Residential real estate mortgages, purchased first mortgages | Origination Loan To Value Ratio 70 Percent And Below
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	83	[2]	55	[3]
Residential real estate mortgages, purchased first mortgages | Origination Loan to Value Ratio 71 Percent Through 89 Percent
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	59	[2]	51	[3]
Residential real estate mortgages, purchased first mortgages | Origination Loan to Value Ratio 90 Percent And Above
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	8	[2]	1	[3]
Residential real estate mortgages
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	5,505	[2]	4,695	[3]
Residential real estate mortgages | Year of origination Pre 2007
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	356		410
Residential real estate mortgages | Year of origination 2007
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	311		393
Residential real estate mortgages | Year of origination 2008
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	581		736
Residential real estate mortgages | Year of origination 2009
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	655		896
Residential real estate mortgages | Year of origination 2010
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	1,976		2,260
Residential real estate mortgages | Year of origination 2011
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	1,626
Residential real estate mortgages | Origination FICO Score Below 620
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	12		11
Residential real estate mortgages | Origination FICO Score 620 Through 679
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	134		130
Residential real estate mortgages | Origination FICO Score 680 Through 739
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	1,072		940
Residential real estate mortgages | Origination FICO Score 740 And Above
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	4,287		3,614
Residential real estate mortgages | Updated FICO Score Below 620
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	67		72
Residential real estate mortgages | Updated FICO Score 620 Through 679
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	168		155
Residential real estate mortgages | Updated FICO Score 680 Through 739
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	836		759
Residential real estate mortgages | Updated FICO Score 740 And Above
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	4,434		3,709
Residential real estate mortgages | Origination Loan To Value Ratio 70 Percent And Below
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	3,518	[2]	2,966	[3]
Residential real estate mortgages | Origination Loan to Value Ratio 71 Percent Through 89 Percent
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	1,952	[2]	1,710	[3]
Residential real estate mortgages | Origination Loan to Value Ratio 90 Percent And Above
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	35	[2]	19	[3]
Home equity lines of credit
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	3,527	[2]	3,500	[3]
Home equity lines of credit | Year of origination Pre 2007
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	1,091		1,132
Home equity lines of credit | Year of origination 2007
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	236		245
Home equity lines of credit | Year of origination 2008
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	1,285		1,345
Home equity lines of credit | Year of origination 2009
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	430		466
Home equity lines of credit | Year of origination 2010
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	315		312
Home equity lines of credit | Year of origination 2011
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	170
Home equity lines of credit | Origination FICO Score 620 Through 679
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	24		26
Home equity lines of credit | Origination FICO Score 680 Through 739
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	672		677
Home equity lines of credit | Origination FICO Score 740 And Above
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	2,831		2,797
Home equity lines of credit | Updated FICO Score Below 620
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	48		49
Home equity lines of credit | Updated FICO Score 620 Through 679
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	100		99
Home equity lines of credit | Updated FICO Score 680 Through 739
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	493		499
Home equity lines of credit | Updated FICO Score 740 And Above
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	2,886		2,853
Home equity lines of credit | Origination Loan To Value Ratio 70 Percent And Below
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	2,387	[2]	2,375	[3]
Home equity lines of credit | Origination Loan to Value Ratio 71 Percent Through 89 Percent
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	1,099	[2]	1,092	[3]
Home equity lines of credit | Origination Loan to Value Ratio 90 Percent And Above
Financing Receivable, Recorded Investment [Line Items]
Loans to banking clients	$ 41	[2]	$ 33	[3]

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

[2] The computation of the Origination LTV ratio for a HELOC includes any first lien mortgage outstanding on the same property at the time of origination. At September 30, 2011, $756 million of $3.5 billion in HELOCs were in a first lien position.

[3] The computation of the Origination LTV ratio for a HELOC includes any first lien mortgage outstanding on the same property at the time of origination. At December 31, 2010, $742 million of $3.5 billion in HELOCs were in a first lien position.