XML 147 R34.htm IDEA: XBRL DOCUMENT v2.4.0.6
Derivative Instruments Derivative Instruments (Policies)
3 Months Ended
Mar. 31, 2012
Derivative instruments [Abstract]  
Derivatives, Policy [Policy Text Block]
As permitted under U.S. GAAP, the Firm has elected to net derivative receivables and derivative payables and the related cash collateral received and paid when a legally enforceable master netting agreement exists.