Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Details) - USD ($) $ in Millions	Oct. 28, 2016	Jan. 29, 2016	Oct. 30, 2015
New Accounting Pronouncement, Early Adoption [Line Items]
Noncurrent other assets	$ 804	$ 511	$ 1,018
Noncurrent deferred tax assets	331	241	295
Long-term debt, excluding current maturities	$ 14,395	$ 11,545	11,530
New Accounting Pronouncement, Early Adoption, Effect [Member] \| Accounting Standards Update 2015-17 [Member] \| Restatement Adjustment [Member]
New Accounting Pronouncement, Early Adoption [Line Items]
Current deferred tax assets			(255)
Noncurrent other assets			(40)
Noncurrent deferred tax assets			295
New Accounting Pronouncement, Early Adoption, Effect [Member] \| Accounting Standards Update 2015-03 [Member] \| Restatement Adjustment [Member]
New Accounting Pronouncement, Early Adoption [Line Items]
Noncurrent other assets			(11)
Long-term debt, excluding current maturities			$ 11

Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, with jurisdictional netting.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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