Financial Instruments - Fair Value Measurements and Related Valuation Techniques and Fair Value Hierarchy Level (Details) - Recurring - USD ($) $ in Millions	Apr. 04, 2020	Dec. 31, 2019
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Marketable equity securities	$ 40.9	$ 59.2
Level 1
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Marketable equity securities	40.9	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)	(139.0)	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)	(139.0)	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)	18.6	(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)	18.6	(4.4)
Net investment hedges | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Asset (Liability)	$ 0.0	$ 0.0