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Stock-based Compensation (Summary of All Stock Option Activity) (Details)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 29, 2017
USD ($)
$ / shares
shares
Shares  
Options outstanding at beginning of the year (in shares) | shares 24,999,665
Granted (in shares) | shares 2,166,110
Exercised (in shares) | shares (4,469,203)
Forfeited (in shares) | shares (229,793)
Expired (in shares) | shares (258,333)
Options outstanding at ending of the year (in shares) | shares 22,208,446
Exercisable at December 31, 2017 (in shares) | shares 16,158,740
Weighted Average Exercise Price  
Options outstanding at beginning of the year (in dollars per share) | $ / shares $ 4.91
Granted (in dollars per share) | $ / shares 23.43
Exercised (in dollars per share) | $ / shares 3.91
Forfeited (in dollars per share) | $ / shares 8.09
Expired (in dollars per share) | $ / shares 9.91
Options outstanding at ending of the year (in dollars per share) | $ / shares 6.83
Exercisable at December 31, 2017 (in dollars per share) | $ / shares $ 4.51
Weighted Average Remaining Contractual Term, Options outstanding at December 31, 2017 4 years 18 days
Weighted Average Remaining Contractual Term, Exercisable at December 31, 2017 3 years 5 months 15 days
Aggregate Intrinsic Value, Options outstanding at December 31, 2017 | $ $ 523,448
Aggregate Intrinsic Value, Exercisable at December 31, 2017 | $ $ 418,304