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Long-Term Debt and Capital Lease Obligations - Additional Information (Details) | 6 Months Ended |  |  |  |
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Jun. 27, 2015 USD ($) | May. 01, 2015 USD ($) | Apr. 30, 2015 USD ($) payment | Mar. 28, 2015 USD ($) | Dec. 27, 2014 USD ($)
Debt Instrument [Line Items] |  |  |  |  |
Maximum borrowing capacity, Term Loan and Line of Credit |  | $ 1,300,000,000.0 | $ 1,300,000,000.0 | $ 970,000,000 |
Term loan facility |  |  | 400,000,000.0 |  |
Multi-currency revolving credit facility |  |  | $ 900,000,000.0 |  |
Number of quarterly installment payments | payment |  |  | 20 |  |
Interest rate | 0.50% |  |  |  |
Weighted average interest rate | 1.31% |  |  |  | 1.42%
Letters of credit outstanding | $ 4,900,000 |  |  |  | $ 5,000,000
Financing Obligation | Early Discovery UK |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Other capital lease obligations | 35,800,000 |  |  |  |
Other Capital Lease Obligations |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Other capital lease obligations | $ 37,400,000 |  |  |  | $ 1,000,000

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- Definition Number of Quarterly Installment Payments + References No definition available. + Details
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- Definition Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 7 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Carrying amount of collateralized debt obligations with maturities initially due after one year or beyond the operating cycle, if longer, excluding the current portion. Obligations include, but not limited to, mortgage loans, chattel loans, and other borrowings secured by assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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