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Equity and Incentive Compensation Plans Equity and Incentive Compensation - Long Term Performance Compensation (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
May 02, 2015
Disclosure - Summary of Long Term Performance Compensation [Abstract]  
Long-term performance compensation expense $ 2.4ann_Longtermperformancecompensationexpense
Long-term performance compensation expense total compensation not yet recognized $ 21.2ann_Longtermperformancecompensationexpensetotalcompensationnotyetrecognized
Unrecognized compensation cost long-term performance compensation plan remaining weighted average service period (in years) 2 years 10 months 24 days