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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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Income Taxes

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Tax Cuts and Jobs Act, Incomplete Accounting, Change in Tax Rate, Deferred Tax Liability, Provisional Income Tax Benefit

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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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

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Amount of increase (decrease) in unrecognized tax benefits attributable to uncertain tax positions taken in tax returns.

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