Fair Value Measurements (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Oct. 31, 2020	Feb. 01, 2020	Oct. 31, 2020	Nov. 02, 2019
Fair Value Measurements [Abstract]
Fair Value, Assets, Level 2 to Level 1 Transfers, Amount	$ 0	$ 0	$ 0	$ 0
Fair Value, Assets, Level 1 to Level 2 Transfers, Amount	0	0	0	0
Fair Value, Liabilities, Level 1 to Level 2 Transfers, Amount	0	0	0	0
Fair Value, Liabilities, Level 2 to Level 1 Transfers, Amount	0	0	0	0
Non-cash gain	190		190	4
Equity method investment fair value	$ 326	134	$ 326	$ 133
Increase (decrease) in minority interests		$ (7)

Fair value portion of investments accounted under the equity method.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 25
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=117311354&loc=d3e32014-111567

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Amount of transfers of assets measured on a recurring basis out of Level 1 of the fair value hierarchy into Level 2.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
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Amount of transfers of assets measured on a recurring basis out of Level 2 of the fair value hierarchy into Level 1.

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Amount of transfers of liabilities measured on a recurring basis out of Level 1 of the fair value hierarchy into Level 2.

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Amount of transfers of liabilities measured on a recurring basis out of Level 2 of the fair value hierarchy into Level 1.

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Net Increase or Decrease in balance of noncontrolling interest in the subsidiary during the reporting period.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 45
-Paragraph 16
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Amount of income or gain included in net income that result in no cash inflow (outflow), classified as other.

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