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Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 30, 2016	May. 02, 2015
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	$ 12,957	$ 13,997
Ending balance	12,545	14,174
Net amount of taxes	283	348
Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(19)
Other comprehensive income before reclassifications	0
Amounts reclassified from AOCI	1
Ending balance	(18)
Cash Flow Hedges | Amount reclassified from other comprehensive income
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Net amount of taxes	1
Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(22)
Other comprehensive income before reclassifications	4
Amounts reclassified from AOCI	0
Ending balance	(18)
Pension and Other Benefits
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(588)
Other comprehensive income before reclassifications	3
Amounts reclassified from AOCI	4
Ending balance	(581)
Pension and Other Benefits | Amount reclassified from other comprehensive income
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Net amount of taxes	2
AOCI Attributable to Parent
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(629)	$ (599)
Other comprehensive income before reclassifications	7
Amounts reclassified from AOCI	5
Ending balance	$ (617)

X

- Definition

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 9
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-Name Accounting Standards Codification
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Amount after tax, before reclassification adjustments of other comprehensive income (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
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Amount after tax of reclassification adjustments of other comprehensive income (loss).

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-Section S99
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-URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74512-122707

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