Commitments and Contingencies - Carnegie Mellon University Settlement (Details) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Jan. 28, 2017 |
Jan. 30, 2016 |
|
| Settlement Agreement and Patent License | ||
| Loss Contingencies [Line Items] | ||
| Litigation settlement, amount | $ 750.0 | |
| CMU Litigation | ||
| Loss Contingencies [Line Items] | ||
| Litigation settlement, amount | $ 6.2 | |
| CMU Litigation | Cost of Goods Sold for Past Use | ||
| Loss Contingencies [Line Items] | ||
| Litigation settlement, amount | $ 81.3 | |
| CMU Litigation | Mutual Release of Claims and Covenant Not to Sue Provisions | Operating Expenses | ||
| Loss Contingencies [Line Items] | ||
| Litigation settlement, amount | 654.7 | |
| CMU Litigation | Future License Settlement | Cost of Goods Sold for Past Use | ||
| Loss Contingencies [Line Items] | ||
| Litigation settlement, amount | $ 14.0 | |