Additional common stock units for election of deferred annual incentive award, percentage.

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- Definition

Age for eligible employee.

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Allocated share based compensation expense (income).

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- Definition

Stock option exercise price as percentage of market value.

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The period in which a stock option can be exercised.

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- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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- Definition

Aggregate number of common shares reserved for future issuance.

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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- Definition

Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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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.

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- Definition

Number of shares authorized for issuance under share-based payment arrangement.

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- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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- Definition

Amount of noncash expense for option under share-based payment arrangement.

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Stock-Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended			6 Months Ended
	Jul. 04, 2020	Jul. 04, 2020	Jun. 29, 2019	Jul. 04, 2020	Jun. 29, 2019	May 08, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options exercise prices as percentage of the market value on the date of the grant		100.00%
Grant date fair value of stock options granted				$ 7.56
Compensation expenses for stock options	$ 1.8		$ 3.8	$ 2.1	$ 4.1
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options vesting period		3 years
Stock options term, years		10 years
Unrecognized compensation expense related to stock	$ 3.1	$ 3.1		3.1
Weighted-average recognition period for unrecognized compensation expense related to stock (years)	2 years 7 months 6 days
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense related to stock	$ 75.1	$ 75.1		75.1
Weighted-average recognition period for unrecognized compensation expense related to stock (years)	1 year 8 months 12 days
Compensation expense	$ 26.8		41.3	$ 36.8	48.1
Omnibus Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation, common stock available for grant	7,800,000	7,800,000		7,800,000
Omnibus Plan [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation, common stock available for grant						19,000,000.0
Inactive Plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for future issuance	1,000,000.0	1,000,000.0		1,000,000.0
LTIP [Member] \| Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Eligible age of officer for restricted stock award				55 years
AIP [Member] \| Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Eligible age of officer for restricted stock award				55 years
Additional common stock units for election of deferred annual incentive award, percentage				25.00%
AIP and LTIP [Member] \| Restricted Stock Awards and Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense related to stock	$ 2.0	$ 2.0		$ 2.0
Weighted-average recognition period for unrecognized compensation expense related to stock (years)	1 year 9 months 18 days
Compensation expense	$ 2.8		$ 3.7	$ 2.5	$ 9.1