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Equity-Based Compensation (Weighted-Average Assumptions Used For Purchase Rights Granted Under Stock Purchase Plan) (Details) (USD $)
9 Months Ended
Oct. 01, 2011
Oct. 02, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Expected dividend yield0.00%0.00%
Expected volatility35.33%39.50%
Risk free interest rate2.01%2.26%
Stock Purchase Plan [Member]
  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Fair market value$ 35.86$ 26.34
Option price$ 34.07$ 25.02
Expected dividend yield0.00%0.00%
Expected volatility32.00%27.00%
Risk free interest rate0.09%0.13%