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Share-Based Compensation - Performance share units (Details) - Performance Share Units
shares in Thousands
3 Months Ended
Apr. 02, 2016
$ / shares
shares
Number of Units  
Outstanding at beginning of period, nonvested (in shares) | shares 549
Granted | shares 284
Forfeited | shares (9)
Outstanding at end of period, nonvested (in shares) | shares 824
Weighted-Average Grant Date Fair Value  
Outstanding at beginning of period, nonvested (in dollars per share) | $ / shares $ 41.84
Granted | $ / shares 34.50
Forfeited | $ / shares (39.56)
Outstanding at end of period, nonvested (in dollars per share) | $ / shares $ 39.33