Postretirement Health Care and Life Insurance Benefits (One Percentage Point Change In Assumed Health Care Cost Rates Would Have The Following Effects) (Details) - Other Postretirement Benefits Plan [Member] $ in Millions |
12 Months Ended |
|---|---|
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Feb. 01, 2020
USD ($)
| |
| 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 | 7 |
| Effect on accumulated postretirement benefit obligations, 1 - percentage point decrease | $ (6) |
| X | ||||||||||
- Definition Amount of decrease in accumulated postretirement benefit obligation from one-percentage-point decrease in assumed health care cost trend rate. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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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://fasb.org/us-gaap/role/ref/legacyRef
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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://fasb.org/us-gaap/role/ref/legacyRef
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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://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Details
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