Outstanding Balance of Loans Sold by Vintage and Type of Buyer (Detail) (USD $) In Billions	Jun. 30, 2011
Outstanding balance remaining of loans sold to outside investors	$ 120.9
Vintage 2005
Outstanding balance remaining of loans sold to outside investors	11.6
Vintage 2005 | Non-Agency Securities
Outstanding balance remaining of loans sold to outside investors	5.9
Vintage 2005 | Agency Securities
Outstanding balance remaining of loans sold to outside investors	5.0	[1]
Vintage 2005 | Ginnie Mae
Outstanding balance remaining of loans sold to outside investors	0.7	[1]
Vintage 2006
Outstanding balance remaining of loans sold to outside investors	12.5
Vintage 2006 | Non-Agency Securities
Outstanding balance remaining of loans sold to outside investors	6.0
Vintage 2006 | Agency Securities
Outstanding balance remaining of loans sold to outside investors	6.0	[1]
Vintage 2006 | Ginnie Mae
Outstanding balance remaining of loans sold to outside investors	0.5	[1]
Vintage 2007
Outstanding balance remaining of loans sold to outside investors	15.6
Vintage 2007 | Non-Agency Securities
Outstanding balance remaining of loans sold to outside investors	3.5
Vintage 2007 | Agency Securities
Outstanding balance remaining of loans sold to outside investors	11.5	[1]
Vintage 2007 | Ginnie Mae
Outstanding balance remaining of loans sold to outside investors	0.6	[1]
Vintage 2008
Outstanding balance remaining of loans sold to outside investors	15.6
Vintage 2008 | Agency Securities
Outstanding balance remaining of loans sold to outside investors	12.9	[1]
Vintage 2008 | Ginnie Mae
Outstanding balance remaining of loans sold to outside investors	2.7	[1]
Vintage 2009
Outstanding balance remaining of loans sold to outside investors	34.6
Vintage 2009 | Agency Securities
Outstanding balance remaining of loans sold to outside investors	28.6	[1]
Vintage 2009 | Ginnie Mae
Outstanding balance remaining of loans sold to outside investors	6.0	[1]
Vintage 2010
Outstanding balance remaining of loans sold to outside investors	21.1
Vintage 2010 | Agency Securities
Outstanding balance remaining of loans sold to outside investors	17.1	[1]
Vintage 2010 | Ginnie Mae
Outstanding balance remaining of loans sold to outside investors	4.0	[1]
Fiscal Year 2011
Outstanding balance remaining of loans sold to outside investors	9.9
Fiscal Year 2011 | Agency Securities
Outstanding balance remaining of loans sold to outside investors	8.4	[1]
Fiscal Year 2011 | Ginnie Mae
Outstanding balance remaining of loans sold to outside investors	1.5	[1]
Agency Securities
Outstanding balance remaining of loans sold to outside investors	89.5	[1]
Ginnie Mae
Outstanding balance remaining of loans sold to outside investors	16.0	[1]
Non-Agency Securities
Outstanding balance remaining of loans sold to outside investors	$ 15.4

[1] Balances based on loans serviced by the Company.