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Leases - Components of Lease Expense (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 29, 2019
Sep. 29, 2019
Operating:    
Operating lease cost $ 6.6 $ 20.3
Short-term lease cost 0.9 2.5
Variable lease cost 1.7 5.2
Financing:    
Amortization of ROU assets 0.1 0.1
Interest on lease liabilities 0.1 0.1
Total lease cost $ 9.4 $ 28.2