Financial Instruments - Narrative (Details)
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3 Months Ended |
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Jan. 11, 2017
USD ($)
financial_institution
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Mar. 30, 2018
USD ($)
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Mar. 31, 2017
USD ($)
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Dec. 31, 2017
USD ($)
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| Derivatives, Fair Value [Line Items] |
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| Foreign currency transaction loss realized |
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$ 4,400,000
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$ 2,300,000
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| Number of financial institutions | financial_institution |
3
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| Hedge ineffectiveness |
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0
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0
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| Effects of cash flow hedges |
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(3,800,000)
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(800,000)
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| Cash Flow Hedging | Reclassification out of Accumulated Other Comprehensive Income | Cost of revenues | Effects of Cash Flow Hedges |
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| Derivatives, Fair Value [Line Items] |
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| Effects of cash flow hedges |
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0
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$ 0
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| Foreign currency exchange contracts |
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| Derivatives, Fair Value [Line Items] |
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| Notional amount |
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$ 115,600,000
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$ 130,500,000
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| Foreign currency exchange contracts | Minimum |
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| Derivatives, Fair Value [Line Items] |
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| Derivative, term of contract (in months) |
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1 month
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| Foreign currency exchange contracts | Maximum |
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| Derivatives, Fair Value [Line Items] |
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| Derivative, term of contract (in months) |
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3 months
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| Interest Rate Swap Expiring December 29, 2017 |
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| Derivatives, Fair Value [Line Items] |
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| Notional amount |
$ 500,000,000.0
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| Interest Rate Swap Expiring December 31, 2018 |
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| Derivatives, Fair Value [Line Items] |
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| Notional amount |
750,000,000.0
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| Interest Rate Swap Expiring December 31, 2019 |
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| Derivatives, Fair Value [Line Items] |
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| Notional amount |
$ 1,000,000,000.0
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| Convertible Debt | 1.00% Notes |
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| Derivatives, Fair Value [Line Items] |
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| Debt instrument, interest rate (as a percent) |
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1.00%
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| Convertible Debt | 1.625% Notes |
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| Derivatives, Fair Value [Line Items] |
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| Debt instrument, interest rate (as a percent) |
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1.625%
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