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Stockholders' Equity - Summary of Share-based Compensation Expense for all Stock Awards (Details) - USD ($) $ in Millions | 12 Months Ended
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Jan. 02, 2022 | Jan. 03, 2021 | Dec. 29, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-based compensation expense, before taxes | $ 941 | $ 194 | $ 194
Related income tax benefits | (64) | (43) | (41)
Share-based compensation expense, net of taxes | 877 | 151 | 153
Cost of product revenue |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-based compensation expense, before taxes | 23 | 21 | 19
Cost of service and other revenue |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-based compensation expense, before taxes | 4 | 4 | 4
Research and development |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-based compensation expense, before taxes | 276 | 74 | 66
Selling, general and administrative |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-based compensation expense, before taxes | $ 638 | $ 95 | $ 105

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