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Long Term Debt and Other Borrowings - Convertible Senior Notes Narrative (Detail) - USD ($) | 1 Months Ended |  |  |
--- | --- | --- | --- | ---
Jun. 30, 2012 | Sep. 24, 2017 | Jun. 25, 2017 | May 31, 2011
1.25% Notes due 2018 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Principal amount |  |  |  | $ 450,000,000
Convertible debt | 1.25% Notes due 2018 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Principal amount |  |  |  | $ 450,000,000
Interest rate percentage |  |  | 1.25% | 1.25%
Convertible debt | 2.625% Notes due 2041 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Principal amount | $ 700,000,000 |  |  |
Interest rate percentage | 2.625% |  | 2.625% |
Maximum amount of contingent interest rate | 0.60% |  |  |
Convertible debt | 0.50% Notes due 2016 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate percentage |  |  | 0.50% |
Convertible debt | 0.50% Notes due 2016 | Conversion of 99, 2016 Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Principal amount |  |  | $ 71,300,000 |
Convertible debt | 0.50% Notes due 2016 | Conversion of 99, 2016 Notes | Subsequent event |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Principal amount |  | $ 301,700,000 |  |

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