v3.4.0.3
Collateralized Transactions (Narrative) (Details) - USD ($)
$ in Billions
Mar. 31, 2016
Dec. 31, 2015
Collateralized Agreements    
Customer margin loans outstanding $ 24.6 $ 25.3
Fair value of financial instruments received as collateral where the Company is permitted to sell or repledge the securities 537.7 522.6
Fair value of financial instruments received as collateral where the Company has sold or repledged 415.9 398.1
Trading assets $ 41.9 $ 35.0