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Long-Term Debt - Narrative (Details) |  |  | 3 Months Ended | 6 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | ---
May 31, 2018 USD ($) | Jan. 31, 2013 USD ($) | Sep. 28, 2018 USD ($) | Jun. 29, 2018 USD ($) $ / shares | Jun. 29, 2018 d $ / shares | Sep. 28, 2018 USD ($) | Sep. 29, 2017 USD ($) | Dec. 31, 2017 USD ($) | Jun. 08, 2015
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt issuance costs | $ 1,100,000 |  | $ 35,700,000 |  |  | $ 35,700,000 |  | $ 44,400,000 |
Debt extinguishment charge | 2,600,000 |  |  |  |  |  |  |  |
Write off of debt issuance costs | 1,500,000 |  |  |  |  |  |  |  |
Write-off of third-party issuance costs | 1,100,000 |  |  |  |  |  |  |  |
Unamortized debt discount and issuance costs expensed |  |  |  |  |  | 1,100,000 | $ 2,400,000 |  |
Long-term debt |  |  | 2,900,100,000 |  |  | 2,900,100,000 |  |  |
Debt, principal balance outstanding |  |  | $ 2,900,100,000 |  |  | $ 2,900,100,000 |  | $ 3,175,000,000 |
Notes Payable to Banks |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument, interest rate (as a percent) |  |  | 0.00% |  |  | 0.00% |  | 3.09% |
Debt instrument, term |  | 7 years |  |  |  |  |  |  |
Debt, principal balance outstanding |  |  | $ 0 |  |  | $ 0 |  | $ 122,700,000 |
1.00% Notes |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument, interest rate (as a percent) |  |  | 1.00% |  |  | 1.00% |  |  |
1.00% Notes | Convertible Debt |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt issuance costs |  |  | $ 6,500,000 |  |  | $ 6,500,000 |  | 8,600,000 |
Conversion price per share (in dollars per share) | $ / shares |  |  |  | $ 24.05 | $ 24.05 |  |  |  |
Debt instrument, interest rate (as a percent) |  |  | 1.00% |  |  | 1.00% |  |  | 1.00%
Long-term debt |  |  | $ 636,500,000 |  |  | $ 636,500,000 |  |  |
Debt, principal balance outstanding |  |  | 690,000,000 |  |  | $ 690,000,000 |  | $ 690,000,000 |
Debt Conversion Period, 20 and 30 Days | 1.00% Notes | Convertible Debt |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Convertible debt instrument, threshold trading days | d |  |  |  |  | 20 |  |  |  |
Convertible debt instrument, threshold, consecutive trading days | d |  |  |  |  | 30 |  |  |  |
Convertible debt instrument, threshold, percentage of stock price trigger |  |  |  |  | 130.00% |  |  |  |
SANYO Electric |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  | $ 377,500,000 |  |  |  |  |  |  |
Line of Credit | Revolving Credit Facility |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Line of credit facility, borrowing capacity | 1,000,000,000.0 |  |  |  |  |  |  |  |
Line of Credit | Term Loan B Facility |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Line of credit facility, borrowing capacity | $ 2,400,000,000.0 |  |  |  |  |  |  |  |
Prepayment of debt |  |  | 20,000,000 | $ 50,000,000 |  |  |  |  |
Unamortized debt discount and issuance costs expensed |  |  | $ 500,000 | $ 1,400,000 |  |  |  |  |
Line of Credit | London Interbank Offered Rate (LIBOR) | Revolving Credit Facility |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Basis spread on variable rate | 1.25% |  |  |  |  |  |  |  |
Line of Credit | London Interbank Offered Rate (LIBOR) | Term Loan B Facility |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Basis spread on variable rate | 1.75% |  |  |  |  |  |  |  |
Line of Credit | Federal Funds Rate |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Basis spread on variable rate | 0.50% |  |  |  |  |  |  |  |
Line of Credit | Adjusted LIBOR |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Basis spread on variable rate | 1.00% |  |  |  |  |  |  |  |
Line of Credit | Adjusted LIBOR | Revolving Credit Facility |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Basis spread on variable rate | 0.25% |  |  |  |  |  |  |  |
Line of Credit | Adjusted LIBOR | Term Loan B Facility |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Basis spread on variable rate | 0.75% |  |  |  |  |  |  |  |

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