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Intangible Assets (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
Jan. 31, 2013
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]  
2013 $ 29.9
2014 27.4
2015 20.9
2016 19.2
2017 $ 18.9