Postretirement Health Care and Life Insurance Benefits (One Percentage Point Change In Assumed Health Care Cost Rates Would Have The Following Effects) (Details) $ in Millions |
12 Months Ended |
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Feb. 03, 2018
USD ($)
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| Defined Benefit Plan, Postretirement Medical Plan with Prescription Drug Benefits [Abstract] | |
| Effect on total of service and interest cost, 1 - percentage point increase | $ 0 |
| Effect on total of service and interest cost, 1 - percentage point decrease | 0 |
| Effect on accumulated postretirement benefit obligations, 1 - percentage point increase | 9 |
| Effect on accumulated postretirement benefit obligations, 1 - percentage point decrease | $ (8) |
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- Definition Amount of decrease in accumulated postretirement benefit obligation from one-percentage-point decrease in assumed health care cost trend rate. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of decrease in service and interest cost components of net periodic postretirement benefit cost from one-percentage-point decrease in assumed health care cost trend rate. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of increase in accumulated postretirement benefit obligation from one-percentage-point increase in assumed health care cost trend rate. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of increase in service and interest cost components of net periodic postretirement benefit cost from one-percentage-point increase in assumed health care cost trend rate. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- References No definition available.
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