Individuals With Minor Injuries

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Number of Bonding Facilities for Bank Guarantees

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Fair value of the amount outstanding under the credit facility.

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-Publisher FASB
-Name Accounting Standards Codification
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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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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 of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

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Commitments and Contingencies - Additional Information (Details) £ in Millions	1 Months Ended	3 Months Ended			12 Months Ended
	Feb. 28, 2014 people	Mar. 29, 2020 USD ($) facility	Mar. 29, 2020 GBP (£) facility	Mar. 31, 2019 USD ($)	Dec. 31, 2019 USD ($) facility	Mar. 29, 2020 GBP (£)	Dec. 31, 2019 GBP (£)
Loss Contingencies [Line Items]
Amount drawn/utilized				$ 17,200,000
Number of bonding facilities for bank guarantees \| facility		2	2
Borrowing capacity		$ 4,000,000.0			$ 0
Credit facility, amount drawn		0
Individuals With minor injuries \| people	3
Committed Banking Facilities
Loss Contingencies [Line Items]
Debt maximum borrowing capacity		150,000,000.0			150,000,000.0
Other - Bank overdraft
Loss Contingencies [Line Items]
Amount drawn/utilized		34,700,000			17,500,000
Bonding Facility For Bank Guarantees
Loss Contingencies [Line Items]
Debt maximum borrowing capacity		5,500,000			5,900,000	£ 4.5
Amount drawn/utilized		1,900,000	£ 1.6		2,300,000
Letter of Credit
Loss Contingencies [Line Items]
Debt maximum borrowing capacity		1,200,000			1,300,000	£ 1.0	£ 1.0
Amount drawn/utilized		$ 0			$ 0
United Kingdom, Pounds
Loss Contingencies [Line Items]
Number of bonding facilities for bank guarantees \| facility					1
U.S. dollars
Loss Contingencies [Line Items]
Number of bonding facilities for bank guarantees \| facility		1	1
U.S. dollars \| Bonding Facility For Bank Guarantees
Loss Contingencies [Line Items]
Amount drawn/utilized		$ 400,000			$ 400,000