Employee Stock Plans (Narrative) (Details) $ / shares in Units, $ in Millions	12 Months Ended
Jan. 29, 2017 USD ($) stockplan years_old $ / shares shares	Jan. 31, 2016 USD ($) shares	Feb. 01, 2015 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage at Which Restricted Stock Lapse upon Third And Sixth Anniversaries of Date of Issuance	25.00%
Remaining Percentage of the Restricted Stock Lapsing upon the Associate's Attainment of Age Sixty Two	50.00%
Remaining Percentage of Restricted Stock Lapsing upon Earlier of Associate's Attainment of Age Sixty or the Tenth Anniversary Date	50.00%
Share-based Compensation Expense	$ 267	$ 244	$ 225
Intrinsic Value of Option Exercises in Period	$ 140	$ 206	234
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number \| shares	8,720,000	9,466,000
Weighted Average Remaining Life of Options Outstanding	6 years
Intrinsic Value of Options Outstanding	$ 590
Stock Options Exercisable \| shares	4,000,000
Weighted Average Exercise Price of Options Exercisable \| $ / shares	$ 43.68
Weighted Average Remaining Contractual Term of Options Exercisable	4 years
Intrinsic Value of Options Exercisable	$ 407
Number of Outstanding Options Vested and Expected to Vest \| shares	7,000,000
Number Of Employee Stock Purchase Plans \| stockplan	2
2005 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common Stock Authorized \| shares	255,000,000
Reduction in Number of Shares Available for Issuance \| shares	2.11
Shares Available for Future Grants \| shares	133,000,000
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award Vesting Rights, Percentage	25.00%
Age at Which Award becomes Non-Forfeitable \| years_old	60
Award Requisite Service Period	5 years
Share-based Compensation Expense	$ 26	$ 26	23
Unrecognized Compensation Expense	$ 30
Weighted Average Period over Which Unrecognized Compensation Will Be Recognized	2 years
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Age at Which Award becomes Non-Forfeitable \| years_old	60
Age When Remaining Stock Lapses If Not Tenth Anniversary Of Grant Date \| years_old	60
Age When Remaining Stock Lapses \| years_old	62
Award Requisite Service Period	5 years
Share-based Compensation Arrangement By Share-based Payment Award, Maximum Period Of Restrictions Lapse	5 years
Share-based Compensation Expense	$ 199	180	168
Unrecognized Compensation Expense	$ 327
Weighted Average Period over Which Unrecognized Compensation Will Be Recognized	2 years
Fair Value of Equity Instruments Other than Options Vested in Period	$ 354	382	334
Deferred Compensation, Share-based Payments [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Expense	$ 16	$ 15	$ 14

Age when remaining stock lapses

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Age when remaining stock lapses if not tenth anniversary of grant date.

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Number of Employee Stock Purchase Plans ("ESPPs").

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Percentage which the restricted stock lapse upon the third and sixth anniversaries of the date of issuance.

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Reduction of number of shares available for issuance.

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Remaining percentage of the restricted stock lapsing upon the associate's attainment of age sixty two.

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Remaining percentage of the restricted stock lapsing upon the earlier of the associate's attainment of age 60 or the tenth anniversary date.

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Maximum period over which restrictions on share-based compensation awards lapse.

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Age when share-based compensation award may become non-forfeitable.

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Unrecognized cost of unvested share-based compensation awards.

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-Name Accounting Standards Codification
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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

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Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Number of options outstanding, including both vested and non-vested options.

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As of the balance sheet date, the number of shares into which fully vested and expected to vest stock options outstanding can be converted under the option plan.

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Percentage of vesting of share-based compensation awards.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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