Segment Information - Reconciling Items (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Jan. 31, 2021 |
Jan. 26, 2020 |
Jan. 27, 2019 |
|
| Segment Reporting Information [Line Items] | |||
| Stock-based compensation expense | $ (1,397) | $ (844) | $ (557) |
| Operating income (loss) | 4,532 | 2,846 | 3,804 |
| All Other | |||
| Segment Reporting Information [Line Items] | |||
| Stock-based compensation expense | (1,397) | (844) | (557) |
| Acquisition-related intangible asset amortization | (591) | (6) | (6) |
| Unallocated cost of revenue and operating expenses | (357) | (283) | (261) |
| Acquisition-related inventory step-up charge | (161) | 0 | 0 |
| Acquisition-related and other costs | (84) | (25) | 4 |
| IP-related costs | (38) | (14) | (35) |
| Legal settlement costs | 0 | 0 | (9) |
| Operating income (loss) | $ (2,628) | $ (1,172) | $ (864) |