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Stockholders' Equity, Comprehensive Income and Share-Based Compensation - Narrative (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Apr. 27, 2025 | Jan. 26, 2025 | Apr. 28, 2024 | Apr. 27, 2025 | Apr. 28, 2024 | Mar. 31, 2025 | Mar. 31, 2023
Equity [Line Items] |  |  |  |  |  |  |
Authorized amount |  |  |  |  |  | $ 10,000 | $ 10,000
Remaining authorized repurchase amount | $ 15,900 |  |  | $ 15,900 |  |  |
Dividends declared per share (in dollars per share) | $ 0.46 | $ 0.40 | $ 0.40 | $ 0.86 | $ 0.72 |  |
Payments of dividends to stockholders |  |  |  | $ 651 | $ 532 |  |
Employee Stock Incentive Plan |  |  |  |  |  |  |
Equity [Line Items] |  |  |  |  |  |  |
Number of shares available for grant | 17.0 |  |  | 17.0 |  |  |
Employee Stock Purchase Plan |  |  |  |  |  |  |
Equity [Line Items] |  |  |  |  |  |  |
Number of shares available for grant | 9.0 |  |  | 9.0 |  |  |
Purchase period |  |  |  | 6 months |  |  |
Number of shares issued under the ESPP (in shares) | 1.0 |  | 1.0 | 1.0 | 1.0 |  |
Employee Stock |  |  |  |  |  |  |
Equity [Line Items] |  |  |  |  |  |  |
Performance of total shareholder return |  |  |  | 100.00% |  |  |
Total unrecognized compensation expense | $ 1,200 |  |  | $ 1,200 |  |  |
Weighted average period for unrecognized compensation expense to be recognized |  |  |  | 2 years 8 months 12 days |  |  |
Employee Stock | Employee Stock Purchase Plan |  |  |  |  |  |  |
Equity [Line Items] |  |  |  |  |  |  |
Purchase price of common stock, percent |  |  |  | 85.00% |  |  |
Performance Shares |  |  |  |  |  |  |
Equity [Line Items] |  |  |  |  |  |  |
Additional performance-based awards to be earned upon certain levels of achievement (in shares) | 0.8 |  |  | 0.8 |  |  |
Weight of metric (as a percent) |  | 50.00% |  |  |  |  |
Award measurement period |  | 3 years |  |  |  |  |
Performance Shares | Minimum |  |  |  |  |  |  |
Equity [Line Items] |  |  |  |  |  |  |
Award vesting rights, percentage of target amount |  | 0.00% |  |  |  |  |
Performance Shares | Maximum |  |  |  |  |  |  |
Equity [Line Items] |  |  |  |  |  |  |
Award vesting rights, percentage of target amount |  | 200.00% |  |  |  |  |

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