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Income Taxes Income Taxes Narrative (Details) - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Jan. 28, 2018 | Oct. 28, 2018 | Oct. 29, 2017 | Oct. 28, 2018 | Oct. 29, 2017 | Jan. 28, 2018
Income Taxes [Line Items] |  |  |  |  |  |
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent |  |  |  |  |  | 21.00%
Income Tax Expense (Benefit) |  | $ 779 | $ 1,268 | $ 2,666 | $ 3,904 |
Unrecognized Tax Benefits |  | 80 |  |  |  |
Tax Act Adjustment for Deemed Repatriation of Foreign Earnings [Member] |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |
Income Tax Expense (Benefit) | $ 400 | 86 |  |  |  |
Tax Act Measurement Period Adjustment [Member] |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |
Income Tax Expense (Benefit) |  | 115 |  |  |  |
Adjustment for New Tax Act [Member] |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |
Tax Cuts and Jobs Act, Incomplete Accounting, Change in Tax Rate, Deferred Tax Liability, Provisional Income Tax Benefit | 147 |  |  |  |  |
Unrecognized Tax Benefits | $ 126 |  |  |  |  |
Income Tax Expense (Benefit) |  | $ 29 |  |  |  |

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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I) -URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319 + Details
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