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Investment Securities (Schedule Of Investment Securities) (Details) (USD $)
In Millions
Jun. 30, 2011
Dec. 31, 2010
Investment Securities    
Debt securities available-for-sale $ 2,700.1  
Equity securities available-for-sale 22.7 37.5
Debt securities held-to-maturity 178.1 [1] 195.9 [1]
Non-marketable equity securities carried at cost (2) 82.4 [2] 95.1 [2]
Total investment securities $ 2,983.3 $ 328.5 [3]
[1] Recorded at amortized cost less impairment on securities that have credit-related impairment.
[2] Non-marketable equity securities are carried at cost and primarily consist of shares issued by customers during loan work out situations or as part of an original loan investment.
[3] 2010 data has been conformed to the current quarter presentation.