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Employee Benefit Plans (Weighted Average Assumptions for Award Grants)(Details) - Stock options and stock appreciation rights - $ / shares
12 Months Ended
Dec. 31, 2016
Jan. 02, 2016
Jan. 03, 2015
Stock-based compensation plans disclosures      
Risk-free interest rate 1.10% 1.30% 0.90%
Expected term 3 years 3 years 2 months 24 days 3 years 4 months 24 days
Expected volatility (as a percent) 38.80% 42.30% 47.10%
Expected dividend yield (as a percent) 0.00% 0.00% 0.00%
Estimated fair value per stock option/stock appreciation right granted (in dollars per share) $ 11.25 $ 12.74 $ 38.88