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Postretirement Plans - Narratve (Detail)	12 Months Ended
	Dec. 28, 2019
Defined Benefit Plan Disclosure [Line Items]
Health care cost trend rate, pre-65	5.60%
Health care cost trend rate, post-65	6.10%
U.S. Postretirement Health Care Plans
Defined Benefit Plan Disclosure [Line Items]
Health care cost trend rate, 2039 and thereafter	4.50%
Expected long-term rate of return on plan assets	5.40%

X

- Definition

Defined Benefit Plan, Post-Sixty-Five Health Care Cost Trend Rate Assumed, Next Fiscal Year

+ References

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- Definition

Defined Benefit Plan, Pre-Sixty-Five Health Care Cost Trend Rate Assumed, Next Fiscal Year

+ References

No definition available.

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- Definition

Weighted average rate of return on plan assets, reflecting average rate of earnings expected on existing plan assets and expected contributions, used to determine net periodic benefit cost of defined benefit plan.

+ 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 (k)(3)
-URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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- Definition

Ultimate trend rate for health care cost for defined benefit postretirement plan.

+ 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 (l)
-URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920

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