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Derivatives and Financial Instruments - Fair Values of Financial Instruments (Details) $ in Millions | Mar. 29, 2020 USD ($)
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Foreign currency contract |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Foreign currency contract assets | $ 0.4
Foreign currency contract liabilities | 0.6
Foreign currency contract | Level 1 |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Foreign currency contract assets | 0.0
Foreign currency contract liabilities | 0.0
Foreign currency contract | Level 2 |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Foreign currency contract assets | 0.4
Foreign currency contract liabilities | 0.6
Foreign currency contract | Level 3 |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Foreign currency contract assets | 0.0
Foreign currency contract liabilities | 0.0
Loan Notes | Loan Notes due 2021 |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Interest bearing loans and borrowings | 25.0
Loan Notes | Loan Notes due 2023 |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Interest bearing loans and borrowings | 25.4
Loan Notes | Loan Notes due 2026 |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Interest bearing loans and borrowings | 26.1
Loan Notes | Level 1 | Loan Notes due 2021 |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Interest bearing loans and borrowings | 0.0
Loan Notes | Level 1 | Loan Notes due 2023 |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Interest bearing loans and borrowings | 0.0
Loan Notes | Level 1 | Loan Notes due 2026 |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Interest bearing loans and borrowings | 0.0
Loan Notes | Level 2 | Loan Notes due 2021 |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Interest bearing loans and borrowings | 25.0
Loan Notes | Level 2 | Loan Notes due 2023 |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Interest bearing loans and borrowings | 25.4
Loan Notes | Level 2 | Loan Notes due 2026 |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Interest bearing loans and borrowings | 26.1
Loan Notes | Level 3 | Loan Notes due 2021 |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Interest bearing loans and borrowings | 0.0
Loan Notes | Level 3 | Loan Notes due 2023 |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Interest bearing loans and borrowings | 0.0
Loan Notes | Level 3 | Loan Notes due 2026 |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Interest bearing loans and borrowings | 0.0
Revolving credit facility |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Interest bearing loans and borrowings | 34.7
Revolving credit facility | Level 1 |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Interest bearing loans and borrowings | 0.0
Revolving credit facility | Level 2 |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Interest bearing loans and borrowings | 34.7
Revolving credit facility | Level 3 |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Interest bearing loans and borrowings | $ 0.0

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- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=109250915&loc=d3e13433-108611 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 + Details
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