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Taxes (Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Jan. 28, 2017 | Jan. 30, 2016 | Jan. 31, 2015
Federal income tax statutory rate | 35.00% | 35.00% | 35.00%
Net change in the valuation allowance | $ 9 | $ 3 |
Federal net operating loss carryforwards | 0 |  |
State net operating loss carryforwards | 374 |  |
State credit carryforwards | 31 |  |
Unrecognized tax benefits that would impact effective income tax rate | 109 | 115 |
Charges (credit) to income tax expense for federal, state and local interest and penalties | 2 | 1 | $ (3)
Accrual for payment of federal, state and local interest and penalties | 55 | $ 53 |
Other noncurrent liabilities [Member] |  |  |
Accrual for payment of federal, state and local interest and penalties | 54 |  |
Current Income Taxes [Member] |  |  |
Accrual for payment of federal, state and local interest and penalties | $ 1 |  |
Maximum [Member] |  |  |
Operating Loss Carryforwards, Expiration Dates | Dec. 31, 2036 |  |
Minimum [Member] |  |  |
Operating Loss Carryforwards, Expiration Dates | Dec. 31, 2017 |  |

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=68052875&loc=d3e28680-109314 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32621-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32632-109319 + Details
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible domestic operating loss carryforwards. Excludes state and local operating loss carryforwards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32621-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=68052875&loc=d3e28680-109314 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32632-109319 + Details
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