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Debt and Credit Facilities (Components Of Debt) (Details)	Apr. 03, 2020 USD ($)	Apr. 03, 2020 EUR (€)	Dec. 31, 2019 USD ($)	Sep. 20, 2019 USD ($)
Debt Instrument [Line Items]
Total debt	$ 1,550,200,000
Less: current portion	(3,500,000)
Long-term debt	1,546,700,000		$ 1,321,000,000.0
Senior unsecured term loan facility due 2022 ($650.0 million aggregate principal amount) (the “Term Loan Facility”)
Debt Instrument [Line Items]
Term loan	650,000,000
Total debt	648,900,000			$ 650,000,000
Senior unsecured euro term loan facility due 2022 (€600.0 million aggregate principal amount) (the “Euro Term Loan Facility”)
Debt Instrument [Line Items]
Term loan \| €		€ 600,000,000
Total debt	647,800,000
Senior unsecured multi-currency revolving credit facility ($250.0 million borrowing capacity) (the “Revolving Credit Facility”)
Debt Instrument [Line Items]
Revolving credit facility maximum borrowing capacity	250,000,000
Total debt	249,800,000
Other
Debt Instrument [Line Items]
Total debt	$ 3,700,000