Debt - Schedule of Long-term debt (Details) - USD ($) $ in Millions	Mar. 28, 2020	Dec. 28, 2019
Debt Instrument
Total principal of debt	$ 2,972.4	$ 2,985.0
Deferred issuance costs	(39.7)	(41.8)
Accrued interest	24.1	15.2
Total carrying value of debt	2,956.8	2,958.4
Debt, current portion	54.9	46.1
Debt, less current portion	2,901.9	2,912.3
Secured debt: \| —Dollar Term Loan
Debt Instrument
Total principal of debt	1,694.8	1,699.1
Secured debt: \| —Euro Term Loan
Debt Instrument
Total principal of debt	$ 709.5	717.7
Unsecured debt: \| —6.25% Dollar Senior Notes due 2026
Debt Instrument
Stated interest rate on debt (percent)	6.25%
Total principal of debt	$ 568.0	568.0
Unsecured debt: \| —Other loans
Debt Instrument
Total principal of debt	$ 0.1	$ 0.2

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Amount of interest payable on debt, including, but not limited to, trade payables.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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