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Leases - Lease Expense (Details) - USD ($)
$ in Millions
3 Months Ended
Apr. 04, 2020
Mar. 30, 2019
Leases [Abstract]    
Operating lease expense $ 36.3 $ 32.5
Short-term lease expense 4.1 4.4
Variable lease expense 1.9 0.6
Total lease expense $ 42.3 $ 37.5