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Income Tax Expense Additional Information (Details Textuals) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 30, 2018 | Dec. 29, 2017 | Dec. 30, 2016 | Dec. 29, 2017 | Dec. 30, 2016
Income Tax Disclosure [Line Items] |  |  |  |  |
U.S. federal statutory income tax rate, percent |  | 35.00% |  | 28.00% |
Tax cuts and jobs act of 2017, provisional income tax expense amount |  | $ 1,660 |  | $ 1,660 |
Tax cuts and jobs Act of 2017, change in tax rate, provisional amount |  | $ 88 |  | $ 88 |
Deferred tax assets, projected effective rate at which position will reverse |  | 29.00% |  | 29.00% |
Deferred tax liabilities, projected effective rate at which position will reverse |  | 22.00% |  | 22.00% |
Tax cuts and jobs act of 2017, transition tax for accumulated foreign earnings, liability, incomplete accounting, provisional amount |  |  |  | $ 1,660 |
Tax cuts and jobs act of 2017, transition tax for accumulated foreign earnings, liability, current, incomplete accounting, provisional amount |  | $ 132 |  | 132 |
Effective income tax rate reconciliation, change in enacted tax rate, amount |  | $ 7 |  | $ 7 |
Effective tax rate |  | 206.00% | 27.00% | 110.00% | 362.00%
Excess tax benefit from share-based compensation, operating activities |  | $ 5 |  | $ 27 |
Income tax expense |  | 1,597 | $ 86 | 1,626 | $ 181
Deferred tax assets, valuation allowance |  |  |  |  | 109
Extinguishment of debt, amount |  |  |  |  | (96)
Unrecognized tax benefits, period increase (decrease) |  |  |  | 7 |
Unrecognized tax benefits |  | 529 |  | 529 |
Income tax penalties and interest accrued |  | $ 94 |  | 94 |
Scenario, Forecast |  |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |  |
U.S. federal statutory income tax rate, percent | 21.00% |  |  |  |
Pro Forma |  |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |  |
Effective tax rate |  | 4.00% |  |  |
SanDisk |  |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |  |
Income tax expense |  |  |  |  | $ 90
Internal Revenue Service (IRS) |  |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |  |
Current federal tax expense (benefit) |  |  |  | $ 795 |

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- Definition Amount of cash outflow for realized tax benefit related to deductible compensation cost reported on the entity's tax return for equity instruments in excess of the compensation cost for those instruments recognized for financial reporting purposes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 20 -Section 55 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=96864182&loc=d3e11374-113907 + Details
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- Definition Amount of other income tax expense (benefit). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32672-109319 + Details
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