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Pension and Postretirement Health Care Plans - Narrative (Details) - USD ($) | 12 Months Ended
--- | ---
Jan. 30, 2016 | Jan. 31, 2015
Defined Benefit Plan Disclosure [Line Items] |  |
Future salary growth | $ 0 | $ 0
Adjustments (as a percent) | 20.00% |
Adjustment period | 5 years |
Allocation to real estate (as a percent) | 100.00% | 100.00%
Equity Securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Securities | 8.00% |
Percentage of total plan assets (less than) | 1.00% |
Debt Securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Securities | 5.00% |
Allocation to real estate (as a percent) | 44.00% | 28.00%
Balanced Funds |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Securities | 8.00% |
Allocation to real estate (as a percent) | 21.00% | 31.00%
Other |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Securities | 9.50% |
Allocation to real estate (as a percent) | 9.00% | 10.00%
Real Estate |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Allocation to real estate (as a percent) | 4.00% |
Pension Plan |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Discretionary contributions | $ 200,000,000 | $ 150,000,000
Pension Plan | 5-Year |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Annual rate of return on qualified plan assets | 8.40% |
Annual rate of return on qualified plan assets period | 5 years |
Pension Plan | 10-Year |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Annual rate of return on qualified plan assets | 7.20% |
Annual rate of return on qualified plan assets period | 10 years |
Pension Plan | 15-Year |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Annual rate of return on qualified plan assets | 6.80% |
Annual rate of return on qualified plan assets period | 15 years |
Pension Plan | 20-Year |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Annual rate of return on qualified plan assets | 8.50% |
Annual rate of return on qualified plan assets period | 20 years |
SG&A | Postretirement Health Coverage |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Reduction in the projected postretirement health care benefit obligation | $ 58,000,000 |
Curtailment gain | $ 43,000,000 |

X
- Definition Represents the amount of future salary growth used in assumption for determination of present value of benefit earned to date. + References No definition available. + Details
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- Definition Defined Benefit Plan, Assumptions, Compound Annual Rate of Return, Period + References No definition available. + Details
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- Definition This element represents the Compound annual rate of return on plan assets as of the balance sheet date. + References No definition available. + Details
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- Definition This element represents the annualized long-term rate of return assumptions on plan assets. + References No definition available. + Details
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- Definition This element represents rate at which the expected Market-Related Value of Assets (MRV) is adjusted for asset gains and losses. + References No definition available. + Details
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- Definition This element represents the period over which the market related adjustments relating to assets are adjusted. + References No definition available. + Details
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- Definition The maximum percentage of investment in common stock to total plan assets as of the balance sheet date. + References No definition available. + Details
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- Definition Net increase or decrease in the plan benefit obligation during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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- Definition 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. + References No definition available. + Details
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- Definition The amount of net gain (loss) recognized in net periodic benefit cost as a result of an event that significantly reduces the expected years of future service of present employees or eliminates for a significant number of employees the accrual of defined benefits for some or all of their future services. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Plan Curtailment -URI http://asc.fasb.org/extlink&oid=6520938 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(7) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Section 15 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=7577095&loc=d3e8001-114927 + Details
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- Definition Percentage of fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of plan assets held. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e2446-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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- Definition The amount of cash or cash equivalents contributed during the reporting period by the entity to fund its pension plans and its non-pension postretirement benefit plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3536-108585 + Details
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