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Retirement Plans (Narrative) (Details) $ in Millions | 12 Months Ended
--- | ---
Jan. 28, 2017 USD ($) yr d | Jan. 30, 2016 USD ($) | Jan. 31, 2015 USD ($)
2016 reduction in service cost and interest cost | $ 36 |  |
Number of hours required for participation in defined benefit and defined contribution plans | 1,000 |  |
Liability under qualified defined contribution plan | $ 102 | $ 97 |
Minimum [Member] |  |  |
Range of restrictions on investment redemption frequency, number of times allowed per year | d | 2 |  |
Maximum [Member] |  |  |
Range of restrictions on investment redemption frequency, number of times allowed per year | d | 365 |  |
Supplemental Employee Retirement Plan |  |  |
Discount rate | 4.07% | 4.23% |
Accumulated benefit obligation for defined benefit plan | $ 747 | $ 823 |
Defined Benefit Plan, Future Amortization of Gain (Loss) | 8 |  |
Company contributions to defined benefit pension plan | $ 124 | $ 58 |
Discount rate for interest cost (percent) |  | 3.55% | 4.50%
Supplemental Employee Retirement Plan | Minimum [Member] |  |  |
Discount rate for interest cost (percent) | 2.65% |  |
Supplemental Employee Retirement Plan | Maximum [Member] |  |  |
Discount rate for interest cost (percent) | 3.16% |  |
Pension Plan [Member] |  |  |
Discount rate | 4.00% | 4.17% |
Expected long-term return on plan assets | 7.00% | 7.00% | 7.50%
Accumulated benefit obligation for defined benefit plan | $ 3,464 | $ 3,574 |
Defined Benefit Plan, Future Amortization of Gain (Loss) | 33 |  |
Unfunded commitments to certain of these investments | 72 | 96 |
Company contributions to defined benefit pension plan | $ 0 | $ 0 |
Discount rate for service cost (percent) |  | 3.55% | 4.50%
Discount rate for interest cost (percent) |  | 3.55% | 4.50%
Pension Plan [Member] | Minimum [Member] |  |  |
Range of investment lock-up period, in years | yr | 2 |  |
Range of advance notice requirements for investment redemption, in days | d | 60 |  |
Discount rate for service cost (percent) | 3.79% |  |
Discount rate for interest cost (percent) | 2.96% |  |
Pension Plan [Member] | Maximum [Member] |  |  |
Range of investment lock-up period, in years | yr | 14 |  |
Range of advance notice requirements for investment redemption, in days | d | 90 |  |
Discount rate for service cost (percent) | 4.26% |  |
Discount rate for interest cost (percent) | 3.30% |  |
Pension Plan [Member] | Equity securities [Member] |  |  |
Target allocation for equity securities in defined benefit plan | 50.00% |  |
Pension Plan [Member] | Debt Securities [Member] |  |  |
Target allocation for equity securities in defined benefit plan | 40.00% |  |
Pension Plan [Member] | Real Estate Funds [Member] |  |  |
Target allocation for equity securities in defined benefit plan | 5.00% |  |
Pension Plan [Member] | Private equity [Member] |  |  |
Target allocation for equity securities in defined benefit plan | 5.00% |  |
Defined Contribution Qualified Plan [Member] | Other Postretirement Benefit Plan [Member] |  |  |
Employee retirement plan expense | $ 94 | $ 88 | $ 89
Non qualified defined contribution plan [Member] | Other Postretirement Benefit Plan [Member] |  |  |
Employee retirement plan expense | 2 | 2 | $ 2
Investments | 20 | 13 |
Management [Member] | Other Postretirement Benefit Plan [Member] |  |  |
Liability for deferred compensation plan reflected in other liabilities | 37 | 39 |
Other Liabilities [Member] | Non qualified defined contribution plan [Member] | Other Postretirement Benefit Plan [Member] |  |  |
Liability under non-qualified defined contribution plan | 20 | 13 |
Accounts Payable and Accrued Liabilities [Member] | Non qualified defined contribution plan [Member] | Other Postretirement Benefit Plan [Member] |  |  |
Liability under non-qualified defined contribution plan | $ 2 | $ 2 |
Previously Reported | Pension Plan [Member] |  |  |
Discount rate for service cost (percent) | 4.17% |  |
Discount rate for interest cost (percent) | 4.23% |  |

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- Definition Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate, Service Cost + References No definition available. + Details
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- Definition For defined benefit pension plans, the actuarial present value of benefits (whether vested or nonvested) attributed by the pension benefit formula to employee service rendered before a specified date and based on employee service and compensation (if applicable) before that date. The accumulated benefit obligation differs from the projected benefit obligation in that it includes no assumption about future compensation levels. For plans with flat-benefit or nonpay-related pension benefit formulas, the accumulated benefit obligation and the projected benefit obligation are the same. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Accumulated Benefit Obligation -URI http://asc.fasb.org/extlink&oid=6503844 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
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- Definition The interest rate used to adjust for the time value of money for the plan. + 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 (k)(1) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
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- Definition An assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Expected Long-Term Rate of Return on Plan Assets -URI http://asc.fasb.org/extlink&oid=6512046 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(3) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
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- Definition The amount of increase or decrease in net periodic benefit cost related to the effects of a change in the substantive terms of an existing defined benefit plan or the initiation of a new plan. A plan amendment may increase or decrease benefits, including those attributed to years of service already rendered. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Plan Amendment -URI http://asc.fasb.org/extlink&oid=49173939 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (r) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Prior Service Cost -URI http://asc.fasb.org/extlink&oid=49177896 + Details
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