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Financial Instruments - Fair Value Measurements and Related Valuation Techniques and Fair Value Hierarchy Level (Details) - Recurring - USD ($)
$ in Millions
Jul. 04, 2020
Dec. 31, 2019
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Marketable equity securities $ 47.3 $ 59.2
Level 1    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Marketable equity securities 47.3 59.2
Level 2    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Marketable equity securities 0.0 0.0
Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Marketable equity securities 0.0 0.0
Foreign currency contracts, net    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Asset (Liability) (29.1) 50.3
Foreign currency contracts, net | Level 1    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Asset (Liability) 0.0 0.0
Foreign currency contracts, net | Level 2    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Asset (Liability) (29.1) 50.3
Foreign currency contracts, net | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Asset (Liability) 0.0 0.0
Net investment hedges    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Asset (Liability) 6.0 (4.4)
Net investment hedges | Level 1    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Asset (Liability) 0.0 0.0
Net investment hedges | Level 2    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Asset (Liability) 6.0 (4.4)
Net investment hedges | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Asset (Liability) $ 0.0 $ 0.0