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Stockholders' Equity (Accelerated Share Repurchases) (Details) - USD ($) shares in Millions, $ in Millions			1 Months Ended	2 Months Ended			3 Months Ended						4 Months Ended		5 Months Ended	12 Months Ended
	Aug. 15, 2018	May 17, 2018	Jul. 30, 2017	Jan. 29, 2019	Jan. 28, 2018	Jul. 30, 2017	Nov. 18, 2019	Nov. 03, 2019	Jul. 29, 2018	Apr. 29, 2018	Oct. 29, 2017	Jul. 30, 2017	Aug. 15, 2018	May 17, 2018	Jan. 28, 2018	Feb. 02, 2020	Feb. 03, 2019	Jan. 28, 2018
Accelerated Share Repurchases [Line Items]
Cash paid for repurchases of common stock																$ 6,965	$ 9,963	$ 8,000
Repurchases of common stock through accelerated share agreements (in shares)																32.0	55.0	49.0
Q2 Accelerated Share Repurchase Agreement
Accelerated Share Repurchases [Line Items]
Cash paid for repurchases of common stock									$ 1,600			$ 1,650
Repurchases of common stock through accelerated share agreements (in shares)	1.0		1.1			10.8			7.1			9.7	8.1
Q3 Accelerated Share Repurchase Agreement
Accelerated Share Repurchases [Line Items]
Cash paid for repurchases of common stock								$ 820			$ 1,200
Repurchases of common stock through accelerated share agreements (in shares)				0.4	0.7		3.6	3.2			6.7				7.4
Q1 Accelerated Share Repurchase Agreement
Accelerated Share Repurchases [Line Items]
Cash paid for repurchases of common stock										$ 750
Repurchases of common stock through accelerated share agreements (in shares)		0.8								3.4				4.2

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The cash outflow to reacquire common stock during the period.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585

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Number of shares that have been repurchased during the period and are being held in treasury.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
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