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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)

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