Shareholders' Equity (Details) - USD ($) $ / shares in Units, $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Jan. 26, 2020 |
Jan. 27, 2019 |
Jan. 28, 2018 |
|
| Equity [Abstract] | |||
| Dividends paid | $ 390 | $ 371 | $ 341 |
| Aggregate number of shares repurchased under stock repurchase program (in shares) | 260,000,000 | ||
| Aggregated cost of shares repurchased | $ 7,080 | ||
| Remaining authorized shares repurchase amount | $ 7,240 | ||
| Preferred stock outstanding (in shares) | 0 | 0 | |
| Common stock, shares authorized (in shares) | 2,000,000,000 | 2,000,000,000 | |
| Common stock, par value (in USD per share) | $ 0.001 | $ 0.001 | |