Employee Retirement Plans (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Jan. 26, 2020 |
Jan. 27, 2019 |
Jan. 28, 2018 |
|
| Defined Contribution Plan Disclosure [Line Items] | |||
| Maximum deferral amount of pre-tax earnings for employees (as percent) | 80.00% | ||
| United States | |||
| Defined Contribution Plan Disclosure [Line Items] | |||
| Defined contribution plan costs | $ 44 | $ 39 | $ 23 |
| Foreign Plan | |||
| Defined Contribution Plan Disclosure [Line Items] | |||
| Defined contribution plan costs | $ 32 | $ 31 | $ 25 |