New Lease Accounting Standard - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Oct. 27, 2019	Oct. 28, 2018	Oct. 27, 2019	Oct. 28, 2018	Jan. 28, 2019	Jan. 27, 2019
Leases [Abstract]
Operating lease assets	$ 527		$ 527		$ 470	$ 0
Operating lease liabilities	$ 558		$ 558		500
Deferred rent credit					$ 30
Lease not yet commenced, term of contract	7 years		7 years
Lease not yet commenced	$ 62		$ 62
Operating lease expense	$ 28	$ 22	$ 83	$ 58
Weighted average remaining lease term - operating leases	8 years 6 months		8 years 6 months
Weighted average discount rate - operating leases	3.68%		3.68%

Lessee, Operating Lease, Lease Not Yet Commenced, Undiscounted Amount

No definition available.

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- Definition

The cumulative difference between the rental payments required by a lease agreement and the rental income or expense recognized on a straight-line basis, or other systematic and rational basis more representative of the time pattern in which use or benefit is granted or derived from the leased property, expected to be recognized in income or expense over the term of the leased property by the lessor or lessee, respectively.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 25
-Paragraph 1
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- References

No definition available.

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- Definition

Term of lessee's operating lease not yet commenced, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980

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- Definition

Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.

+ References

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-Publisher FASB
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- Definition

Present value of lessee's discounted obligation for lease payments from operating lease.

+ References

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-Publisher FASB
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-Topic 842
-SubTopic 20
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- Definition

Amount of lessee's right to use underlying asset under operating lease.

+ References

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- Definition

Weighted average discount rate for operating lease calculated at point in time.

+ References

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- Definition

Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

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