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Income Taxes (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jun. 27, 2021 | Jun. 28, 2020 | Jun. 27, 2021 | Jun. 28, 2020 | Sep. 26, 2021 | Sep. 27, 2020
Income Taxes [Line Items] |  |  |  |  |  |
Effective income tax rate (benefit) | 10.00% | 3.00% |  |  |  |
Income Tax Expense (Benefit) | $ 230 | $ 23 | $ 744 | $ 175 |  |
Unrecognized tax benefits | 2,000 |  | $ 2,000 |  |  | $ 1,900
Internal Revenue Service (IRS) |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |
Income Tax Expense (Benefit) | $ 64 |  |  |  |  |
Forecast |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |
Effective income tax rate (benefit) |  |  |  |  | 11.00% |
Forecast | FDII Effective Tax Rate |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |
Effective income tax rate (benefit) |  |  |  |  | 13.00% |

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