Retirement Plans and Other Benefits (Effect of One Percentage-Point Change in Assumed Health Care Cost Trend Rates) (Details) - Supplemental Employee Retirement Plan [Member] $ in Millions	12 Months Ended
Feb. 01, 2020 USD ($)
Assumed Health Care Cost Trend Rates, Effect of One Percentage Point Change [Line Items]
Effect on total service and interest cost components, 1% increase	$ 1
Effect on accumulated postretirement benefit obligation, 1% increase	2
Effect on total service and interest cost components, 1% (decrease)
Effect on accumulated postretirement benefit obligation, 1% (decrease)	$ (1)

Assumed Health Care Cost Trend Rates, Effect of One Percentage Point Change [Line Items]

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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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (m)
-URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920

+ Details

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- 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.

+ References

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- Definition

Amount of increase in accumulated postretirement benefit obligation from one-percentage-point increase in assumed health care cost trend rate.

+ References

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- 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.

+ References

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