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Stock Compensation Equity based compensation programs (Details)
12 Months Ended
Dec. 28, 2019
shares
2017 Long Term Incentive Plan [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of shares authorized, but unissued 16,000,000
Vesting period, years 3 years
Options granted remaining authorized, but unissued, shares 17,000,000
Contractual term, years 10 years
Shares, Issued 2
Shares Reduced From Remaining Available 1
Shares Reduced From Outstanding Award 1
2013 Long Term Incentive Plan [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Vesting period, years 3 years
Contractual term, years 10 years
International Subsidiary Employee Stock Purchase Plan [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Defined Contribution Plan, Employer Matching Contribution, Percent of Match 100.00%