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Income Taxes (Narrative) (Details) - USD ($)
$ in Millions
6 Months Ended
May 31, 2016
Nov. 30, 2015
Income Tax Disclosure [Abstract]    
Deferred tax assets $ 321.3 $ 340.7
Unrecognized tax benefits 12.3 12.3
Income tax penalties and interest accrued 44.4 $ 65.1
Income tax penalties and interest expense 1.6  
Unrecognized tax benefits, decreases in accrued interest and penalties accrued $ 22.3