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Balance Sheet Information and Other - Lease Expense (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jul. 03, 2020
Jun. 28, 2019
Jul. 03, 2020
Jun. 28, 2019
Dec. 31, 2019
Balance Sheet Related Disclosures [Abstract]          
Operating lease $ 9.1 $ 8.3 $ 18.2 $ 16.6  
Variable lease 0.7 1.0 1.8 2.1  
Short-term lease 1.2 0.6 2.4 1.3  
Total lease expense 11.0 $ 9.9 22.4 $ 20.0  
Accrued expenses and other current liabilities 27.6   27.6   $ 26.1
Other long-term liabilities 120.1   120.1   87.9
Total lease obligations $ 147.7   $ 147.7   $ 114.0
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] us-gaap:AccruedLiabilitiesCurrent   us-gaap:AccruedLiabilitiesCurrent    
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] us-gaap:OtherLiabilitiesNoncurrent   us-gaap:OtherLiabilitiesNoncurrent