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Accelerated Share Repurchase Agreements (Details) - USD ($) shares in Millions, $ in Millions		1 Months Ended		2 Months Ended			3 Months Ended	9 Months Ended
	Nov. 20, 2017	Jul. 30, 2017	Jul. 11, 2017	Nov. 20, 2017	Nov. 16, 2017	Jul. 30, 2017	Oct. 29, 2017	Oct. 29, 2017	Oct. 30, 2016	Jan. 29, 2017
Accelerated Share Repurchases [Line Items]
Repurchases of Common Stock								$ 6,067	$ 4,535
Treasury Stock Value							$ 45,993	45,993		$ 40,194
Paid-In Capital							9,883	9,883		$ 9,787
Q2 Accelerate Share Repurchase Agreement [Member]
Accelerated Share Repurchases [Line Items]
Repurchases of Common Stock						$ 1,650
Treasury Stock Shares Acquired		1.1	9.7			10.8
Q3 Accelerate Share Repurchase Agreement [Member]
Accelerated Share Repurchases [Line Items]
Repurchases of Common Stock							1,200
Treasury Stock Value							1,053	1,053
Paid-In Capital							$ 147	$ 147
Subsequent Event [Member] | Q3 Accelerate Share Repurchase Agreement [Member]
Accelerated Share Repurchases [Line Items]
Treasury Stock Shares Acquired	0.7			7.4	6.7

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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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No definition available.

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Value received from shareholders in common stock-related transactions that are in excess of par value or stated value and amounts received from other stock-related transactions. Includes only common stock transactions (excludes preferred stock transactions). May be called contributed capital, capital in excess of par, capital surplus, or paid-in capital.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(30)(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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The cash outflow to reacquire common stock during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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-Publisher FASB
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-Section 50
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The amount allocated to treasury stock. Treasury stock is common and preferred shares of an entity that were issued, repurchased by the entity, and are held in its treasury.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
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-URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655

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