Carnegie Mellon University Settlement - Additional Information (Detail) - Carnegie Mellon Litigation - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended |
|---|---|---|
Jul. 30, 2016 |
Jul. 30, 2016 |
|
| Loss Contingencies [Line Items] | ||
| Litigation settlement, amount | $ 750.0 | |
| Cost of goods sold | ||
| Loss Contingencies [Line Items] | ||
| Litigation settlement, amount | $ 1.6 | 3.2 |
| Mutual release of claims and covenant not to sue provisions | Operating Expense | ||
| Loss Contingencies [Line Items] | ||
| Litigation settlement, amount | 654.7 | |
| Licensing of intellectual property | Cost of goods sold | ||
| Loss Contingencies [Line Items] | ||
| Litigation settlement, amount | $ 81.3 | |
| Future license settlement | ||
| Loss Contingencies [Line Items] | ||
| License expiration period | From February 2016 through April 2018. | |
| Future license settlement | Cost of Goods Sold for Past Use | ||
| Loss Contingencies [Line Items] | ||
| Litigation settlement, amount | $ 14.0 |