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Investment Securities (Investments In Private Equity Funds Subject to Lock-Up Periods) (Details) (Private equity funds, USD $)
In Millions, unless otherwise specified
Dec. 31, 2013
Investment securities  
Trading Securities, Other $ 118.2
1-3 years
 
Investment securities  
Trading Securities, Other 6.9
3 – 5 years
 
Investment securities  
Trading Securities, Other 30.8
5 – 10 years
 
Investment securities  
Trading Securities, Other 67.6
10 years
 
Investment securities  
Trading Securities, Other $ 12.9