Consolidated Balance Sheet (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Held to Maturity, Fair value	$ 4,265.4	$ 2,321.4
Total Loans and Leases, unearned income	$ 298.8	$ 286.2
Common Stock, Par Value	$ 1.6667	$ 1.6667
Common Stock, Authorized	560,000,000	560,000,000
Common Stock, Outstanding	235,584,991	237,322,035
Treasury Stock, shares	9,586,533	7,849,489