Summary of Significant Accounting Policies - Additional Information (Detail) $ in Millions	12 Months Ended
Dec. 31, 2016 USD ($) Customer Contract	Dec. 26, 2015 USD ($) Customer Contract	Dec. 27, 2014 USD ($)
Summary Of Significant Accounting Policies Textual [Abstract]
Highly liquid short-term investments maturity date	Three months or less
Sale of accounts receivable	$ 521.9	$ 519.2	$ 477.9
Additional receivables outstanding if receivables had not been sold	338.3	335.9
Factoring costs associated with the sales of accounts receivable	8.9	7.2	6.2
Long-term core inventory	18.5	14.6
Accrued customer rebates	7.3	15.0
Product warranty reserves	$ 0.5	$ 0.5
Number of largest customers \| Customer	5	5
Number of foreign exchange forward contracts outstanding \| Contract	0	0
Credit Concentration Risk [Member]
Summary Of Significant Accounting Policies Textual [Abstract]
Concentration risk percentage	87.00%	79.00%
Supplier Concentration Risk [Member]
Summary Of Significant Accounting Policies Textual [Abstract]
Concentration risk percentage	77.00%
Selling, General and Administrative Expenses [Member]
Summary Of Significant Accounting Policies Textual [Abstract]
Research and development costs	$ 18.9	$ 16.8	$ 15.8
Minimum [Member]
Summary Of Significant Accounting Policies Textual [Abstract]
Estimated useful life of Property, Plant and Equipment	3 years
Maximum [Member]
Summary Of Significant Accounting Policies Textual [Abstract]
Estimated useful life of Property, Plant and Equipment	39 years

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Number of foreign forward contracts outstanding.

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Number Of Largest Customer

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Receivables not sold additional receivables outstanding.

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Short term investment original maturity period description.

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Summary Of Significant Accounting Policies Textual [Abstract]

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Reflects the net positive or negative amount derived from subtracting from net proceeds of sale, the carrying amounts, net of allocated reserves, of accounts receivable transferred to a third party in a transaction that qualifies for sales treatment.

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Inventories not expected to be converted to cash, sold or exchanged within the normal operating cycle.

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The cash inflow associated with the sale of receivables arising from the financing of goods and services.

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Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers. For classified balance sheets, represents the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.

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