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Stock-Based Compensation (Details) - shares
shares in Millions
12 Months Ended
Jan. 01, 2019
Apr. 05, 2017
Apr. 04, 2017
Stock-Based Compensation      
Shares authorized for issuance under share-based compensation plan   12.7 9.2
Shares available for grant 2.9    
Stock Options      
Stock-Based Compensation      
Annual vesting rights (as a percent) 20.00%    
Stock Options | Minimum      
Stock-Based Compensation      
Option expiration period (in years) 8 years    
Restricted Shares and Restricted Share Units | Minimum      
Stock-Based Compensation      
Annual vesting rights (as a percent) 0.00%    
Vesting period (in years) 3 years    
Restricted Shares and Restricted Share Units | Maximum      
Stock-Based Compensation      
Annual vesting rights (as a percent) 150.00%    
Vesting period (in years) 5 years