Pension And Postretirement Benefits (Schedule of Estimated Future Benefit Payments) (Details) $ in Millions	Jul. 29, 2018 USD ($)
Pension Plan, Defined Benefit [Member]
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	$ 173
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	167
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	168
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	163
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	159
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	777
Other Postretirement Benefit Plan, Defined Benefit [Member]
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	29
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	28
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	26
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	25
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	24
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	$ 97

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- Definition

Amount of benefits for defined benefit plan expected to be paid in five fiscal years after fifth fiscal year following latest fiscal year.

+ 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

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- Definition

Amount of benefits for defined benefit plan expected to be paid in next fiscal year following latest fiscal year.

+ References

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Amount of benefits for defined benefit plan expected to be paid in fifth fiscal year following latest fiscal year.

+ References

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Amount of benefits for defined benefit plan expected to be paid in fourth fiscal year following latest fiscal year.

+ References

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Amount of benefits for defined benefit plan expected to be paid in third fiscal year following latest fiscal year.

+ References

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Amount of benefits for defined benefit plan expected to be paid in second fiscal year following latest fiscal year.

+ References

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