Derivative Financial Instruments - Narrative (Details) - USD ($) |
12 Months Ended | |
|---|---|---|
Jan. 26, 2020 |
Jan. 27, 2019 |
|
| Derivative [Line Items] | ||
| Gain (loss) on ineffectiveness | $ 0 | $ 0 |
| Foreign currency forward contract | ||
| Derivative [Line Items] | ||
| Maximum maturity period | 18 months | |