Performance Contingent ROIC Shares (Detail) - Return On Invested Capital - Twenty Nineteen Award - Omnibus Plan - $ / shares shares in Thousands				3 Months Ended	4 Months Ended	12 Months Ended
Oct. 06, 2019	Jul. 14, 2019	May 23, 2019	Jul. 11, 2020	Apr. 18, 2020	Dec. 28, 2019	Dec. 29, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Granted	2	5	11	2	8	331	440
Vesting Date	Mar. 01, 2022	Mar. 01, 2022	Mar. 01, 2022	Feb. 28, 2023	Feb. 28, 2023	Feb. 28, 2023	Mar. 01, 2022
Fair Value per Share	$ 22.52	$ 23.32	$ 23.08	$ 21.97	$ 23.14	$ 21.74	$ 18.29

Share based compensation arrangement by share based payment award vesting date.

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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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

No definition available.

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