Debt And Credit Facilities (Narrative) (Details) $ in Millions	3 Months Ended	12 Months Ended
May 05, 2018 USD ($)	Apr. 29, 2017 USD ($)	Feb. 03, 2018
Debt Instrument [Line Items]
Proceeds from long-term borrowings	$ 0	$ 635
Principal payments on long-term borrowings	3	653
Interest expense, net	28	48
Interest paid under the make-whole provision	$ 35	50
Basis spread on variable rate	1.275%
Commercial paper [Member]
Debt Instrument [Line Items]
Total short-term borrowing capacity	$ 800
Issuances or borrowings	$ 0
2017 Refinancing [Member]
Debt Instrument [Line Items]
Interest expense, net		18
Interest paid under the make-whole provision		24
Senior notes, 4.00%, due March 2027, net of unamortized discount [Member]
Debt Instrument [Line Items]
Proceeds from long-term borrowings		$ 350
Debt instrument interest rate	4.00%	4.00%	4.00%
Maturity date	March 2027	March 2027	March 2027
Senior notes, 5.00%, due January 2044, net of unamortized discount [Member]
Debt Instrument [Line Items]
Proceeds from long-term borrowings		$ 300
Debt instrument interest rate	5.00%	5.00%	5.00%
Maturity date	January 2044	January 2044	January 2044
Senior notes, 6.25%, due January 2018, net of unamortized discount [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	6.25%	6.25%	6.25%
Maturity date	January 2018	January 2018	January 2018
Principal payments on long-term borrowings		$ 650
Unsecured revolving credit facility [Member]
Debt Instrument [Line Items]
Maturity date	April 2020
Option to increase the maximum capacity of revolving credit facility	$ 200
Maximum borrowing capacity with option	$ 1,000
Debt covenant leverage ratio	4
Issuances or borrowings	$ 0
Line of Credit [Member]
Debt Instrument [Line Items]
Maturity date	Fall 2018
Maximum borrowing capacity with option	$ 52
Issuances or borrowings	$ 47
Debt instrument interest rate	LIBOR plus 1.275%

Debt Instrument, Debt Covenant Leverage Ratio

No definition available.

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- Definition

The maximum amount by which the entity may choose to increase the maximum capacity of a credit facility.

+ References

No definition available.

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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- Definition

Description of the interest rate as being fixed or variable, and, if variable, identification of the index or rate on which the interest rate is based and the number of points or percentage added to that index or rate to set the rate, and other pertinent information, such as frequency of rate resets.

+ References

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- Definition

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.

+ References

No definition available.

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- Definition

Description of the maturity date of the debt instrument including whether the debt matures serially and, if so, a brief description of the serial maturities.

+ References

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- Definition

Amount of the cost of borrowed funds accounted for as interest expense.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
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-Paragraph 1
-Subparagraph (SX 210.9-04.9)
-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

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- Definition

Amount of cash paid, after deduction of cash paid for capitalized interest, for interest. Includes, but is not limited to, payment to settle zero-coupon bond for accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount.

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- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

+ Details

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

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- Definition

The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

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The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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