Annual report pursuant to Section 13 and 15(d)

Financial Instruments - Narrative (Details)

v3.20.4
Financial Instruments - Narrative (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 26, 2020
Dec. 28, 2019
Sep. 14, 2016
Schedule of Investments [Line Items]      
Short-term investments $ 695.0 $ 37.0  
Conversion price (USD per share)     $ 8.00
Foreign Currency Forward Contracts | Designated as Hedging Instrument      
Schedule of Investments [Line Items]      
Derivative, term of contract 12 months    
Derivative, notional amount $ 501.0 467.0  
Foreign Currency Forward Contracts | Not Designated as Hedging Instrument      
Schedule of Investments [Line Items]      
Derivative, term of contract 3 months    
Derivative, notional amount $ 254.0 272.0  
Government money Market Funds | Level 1      
Schedule of Investments [Line Items]      
Restricted investments   4.0  
Mutual Funds | Level 1      
Schedule of Investments [Line Items]      
Restricted investments 46.0 30.0  
Commercial Paper      
Schedule of Investments [Line Items]      
Short-term investments 295.0 37.0  
Commercial Paper | Level 1      
Schedule of Investments [Line Items]      
Short-term investments $ 295.0 $ 37.0