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Stock-based Compensation (Summary of All Stock Option Activity) (Details)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 28, 2018
USD ($)
$ / shares
shares
Shares  
Options outstanding at beginning of the year (in shares) | shares 22,208,446
Granted (in shares) | shares 3,238,473
Exercised (in shares) | shares (2,466,579)
Forfeited (in shares) | shares (288,197)
Expired (in shares) | shares (18,081)
Options outstanding at ending of the year (in shares) | shares 22,674,062
Exercisable at December 31, 2018 (in shares) | shares 16,463,202
Weighted Average Exercise Price  
Options outstanding at beginning of the year (in dollars per share) | $ / shares $ 6.83
Granted (in dollars per share) | $ / shares 19.40
Exercised (in dollars per share) | $ / shares 4.90
Forfeited (in dollars per share) | $ / shares 15.71
Expired (in dollars per share) | $ / shares 20.64
Options outstanding at ending of the year (in dollars per share) | $ / shares 8.71
Exercisable at December 31, 2018 (in dollars per share) | $ / shares $ 5.65
Weighted Average Remaining Contractual Term, Options outstanding at December 31, 2018 3 years 8 months 15 days
Weighted Average Remaining Contractual Term, Exercisable at December 31, 2018 2 years 11 months 15 days
Aggregate Intrinsic Value, Options outstanding at December 31, 2018 | $ $ 254,201
Aggregate Intrinsic Value, Exercisable at December 31, 2018 | $ $ 229,699