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Summary of Target Allocation Guidelines for Plan Assets Along with Actual Allocation of Plan Assets as of Valuation Date (Detail)	Feb. 03, 2018	Jan. 28, 2017
Return-seeking Assets
Pension Plans and Other Retirement Benefits [Line Items]
Target Allocation	50.00%
Actual Allocation	47.00%	44.00%
Liability-hedging Assets
Pension Plans and Other Retirement Benefits [Line Items]
Target Allocation	50.00%
Actual Allocation	46.00%	51.00%
Cash and Cash Equivalents
Pension Plans and Other Retirement Benefits [Line Items]
Target Allocation	0.00%
Actual Allocation	7.00%	5.00%

X

- Definition

Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan.

+ 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 (d)(5)(i)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920

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- Definition

Percentage of fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of plan assets held.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e2446-114920

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(1)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920

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+ References

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