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Postretirement Health Care and Life Insurance Benefits (One Percentage Point Change In Assumed Health Care Cost Rates Would Have The Following Effects) (Details) (USD $)
In Millions, unless otherwise specified |
12 Months Ended |
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Jan. 28, 2012
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| Postretirement Medical Plans with Prescription Drug Benefits [Abstract] | |
| Effect on total of service and interest cost, 1 - percentage point increase | $ 1 |
| Effect on total of service and interest cost, 1 - percentage point decrease | (1) |
| Effect on accumulated postretirement benefit obligations, 1 - percentage point increase | 15 |
| Effect on accumulated postretirement benefit obligations, 1 - percentage point decrease | $ (13) |
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- Definition
The effect of a one-percentage-point decrease in the assumed health care cost trend rates on the accumulated postretirement benefit obligation for health care benefits. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The effect of a one-percentage-point increase in the assumed health care cost trend rates on the accumulated postretirement benefit obligation for health care benefits. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The effect of a one-percentage-point increase 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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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