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Postretirement Health Care and Life Insurance Benefits (Tables) - Other Postretirement Benefits Plan [Member] | 12 Months Ended
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Feb. 03, 2018
Reconciliation of Benefit Obligations, Plan Assets, and Funded Status Pension Plan | The following provides a reconciliation of benefit obligations, plan assets, and funded status of the postretirement obligations as of February 3, 2018 and January 28, 2017:
| 2017 |  | 2016
| (millions)
Change in accumulated postretirement benefit obligation |  |  |
Accumulated postretirement benefit obligation, beginning of year | $ | 186 |  |  | $ | 212 |
Service cost | — |  |  | — |
Interest cost | 5 |  |  | 6 |
Plan amendment | (10 | ) |  | — |
Actuarial gain | (9 | ) |  | (13 | )
Medicare Part D subsidy | 1 |  |  | 1 |
Benefits paid | (17 | ) |  | (20 | )
Accumulated postretirement benefit obligation, end of year | 156 |  |  | 186 |
Change in plan assets |  |  |
Fair value of plan assets, beginning of year | — |  |  | — |
Company contributions | 17 |  |  | 20 |
Benefits paid | (17 | ) |  | (20 | )
Fair value of plan assets, end of year | — |  |  | — |
Funded status at end of year | $ | (156 | ) |  | $ | (186 | )
Amounts recognized in the Consolidated Balance Sheets at February 3, 2018 and January 28, 2017 |  |  |
Accounts payable and accrued liabilities | $ | (17 | ) |  | $ | (18 | )
Other liabilities | (139 | ) |  | (168 | )
| $ | (156 | ) |  | $ | (186 | )
Amounts recognized in accumulated other comprehensive loss at February 3, 2018 and January 28, 2017 |  |  |
Net actuarial gain | $ | (35 | ) |  | $ | (31 | )
Prior service credit | (10 | ) |  | — |
| $ | (45 | ) |  | $ | (31 | )
Schedule of Net Periodic Benefit Costs | Net postretirement benefit costs and other amounts recognized in other comprehensive loss included the following actuarially determined components:
| 2017 |  | 2016 |  | 2015
| (millions)
Net Periodic Postretirement Benefit Cost |  |  |  |  |
Service cost | $ | — |  |  | $ | — |  |  | $ | — |
Interest cost | 5 |  |  | 6 |  |  | 8 |
Amortization of net actuarial gain | (5 | ) |  | (4 | ) |  | — |
Amortization of prior service cost | — |  |  | — |  |  | — |
| — |  |  | 2 |  |  | 8 |
Other Changes in Plan Assets and Projected Benefit Obligation Recognized in Other Comprehensive Loss |  |  |  |  |
Net actuarial gain | (9 | ) |  | (13 | ) |  | (22 | )
Amortization of net actuarial gain | 5 |  |  | 4 |  |  | — |
Prior service credit | (10 | ) |  | — |  |  | — |
| (14 | ) |  | (9 | ) |  | (22 | )
Total recognized | $ | (14 | ) |  | $ | (7 | ) |  | $ | (14 | )
Weighted Average Assumptions | The following weighted average assumption was used to determine the accumulated postretirement benefit obligations at February 3, 2018 and January 28, 2017:
| 2017 |  | 2016
Discount rate | 3.71 | % |  | 3.99 | %
The following weighted average assumption was used to determine the net postretirement benefit costs for the postretirement obligations:
| 2017 |  | 2016 |  | 2015
Discount rate used to measure interest cost | 3.17 | % |  | 3.14 | % |  | 3.55 | %
Schedule of Health Care Cost Trend Rates | The following provides the assumed health care cost trend rates related to the Company’s accumulated postretirement benefit obligations at February 3, 2018 and January 28, 2017:
| 2017 |  | 2016
Health care cost trend rates assumed for next year | 5.50% - 10.50% |  | 6.15% - 9.75%
Rates to which the cost trend rate is assumed to decline (the ultimate trend rate) | 4.5% |  | 5.0%
Year that the rate reaches the ultimate trend rate | 2027 |  | 2027
Schedule Of Effect Of One Percentage Point Change In Assumed Health Care Cost Trend Rates | A one-percentage-point change in the assumed health care cost trend rates would have the following effects:
| 1 – Percentage Point Increase |  | 1 – Percentage Point Decrease
| (millions)
Effect on total of service and interest cost | $ | — |  |  | $ | — |
Effect on accumulated postretirement benefit obligations | $ | 9 |  |  | $ | (8 | )
Estimated Future Benefit Payments | The following table reflects the benefit payments estimated to be funded by the Company and paid from the accumulated postretirement benefit obligations and estimated federal subsidies expected to be received under the Medicare Prescription Drug Improvement and Modernization Act of 2003:
| Expected Benefit Payments |  | Expected Federal Subsidy
| (millions)
Fiscal Year |  |  |
2018 | $ | 16 |  |  | $ | 1 |
2019 | 15 |  |  | — |
2020 | 14 |  |  | — |
2021 | 13 |  |  | — |
2022 | 13 |  |  | — |
2023-2027 | 52 |  |  | 1 |

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- Definition Tabular disclosure of the assumptions used to determine for pension plans and/or other employee benefit plans the benefit obligation and net benefit cost, including assumed discount rates, rate increase in compensation increase, and expected long-term rates of return on plan assets. + 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) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Tabular disclosure of the aggregate benefit obligation and aggregate fair value of plan assets for pension plans and/or other employee benefit plans with benefit obligations in excess of plan assets as of the measurement date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e2417-114920 + Details
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- Definition Tabular disclosure of the effect of a one-percentage-point increase and the effect of a one-percentage-point decrease in the assumed health care cost trend rates on the aggregate of the service and interest cost components of net periodic postretirement health care benefit costs and the accumulated postretirement benefit obligation for health care benefits. + 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 (m) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Tabular disclosure of benefits expected to be paid by pension plans and/or other employee benefit plans in each of the next five fiscal years and in the aggregate for the five fiscal years thereafter. + 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 (f) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Tabular disclosure of the assumed health care cost trend rates for the next year used to measure the expected cost of benefits covered by the plans, including the ultimate trend rate(s) and when that rate is expected to be achieved. + 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 (l) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + 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 (h) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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