Shareholders' Equity (Details) - USD ($) shares in Millions, $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Jan. 31, 2021 |
Jan. 26, 2020 |
Jan. 27, 2019 |
|
| Equity [Abstract] | |||
| Aggregate number of shares repurchased under stock repurchase program (in shares) | 260 | ||
| Aggregated cost of shares repurchased | $ 7,080 | ||
| Remaining authorized shares repurchase amount | 7,240 | ||
| Dividends paid | $ 395 | $ 390 | $ 371 |