Guarantee Arrangements and Pledged Assets and Collateral - Outstanding Repurchase Demands Received From GSEs and Other Third Parties (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Commitments and Contingencies Disclosure [Abstract]
GSEs	$ 41		$ 86		$ 77
Others	3		3		25
Total	$ 44	[1]	$ 89	[1]	$ 102	[1]

[1] Includes repurchase demands on loans sourced from our legacy broker channel of $26 million, $65 million and $87 million at December 31, 2013, 2012 and 2011, respectively.