Fiscal year term.

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- Definition

Number of stockholders.

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No definition available.

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Quarterly Operating Results Unaudited [Line Items]

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No definition available.

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U.K. Facility Relocation Costs

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No definition available.

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- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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- Definition

This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

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Costs incurred to effect a business combination which have been expensed during the period. Such costs could include business integration costs, systems integration and conversion costs, and severance and other employee-related costs.

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No definition available.

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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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Amount of noncash expense for share-based payment arrangement.

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Amount of increase (decrease) to previously recorded tax expense. Includes, but is not limited to, significant settlements of income tax disputes, and unusual tax positions or infrequent actions taken by the entity, including tax assessment reversal, and IRS tax settlement.

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Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset.

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SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED) - Additional Information (Details) $ in Millions	3 Months Ended								12 Months Ended
	Jan. 03, 2020 USD ($)	Sep. 27, 2019 USD ($)	Jun. 28, 2019 USD ($)	Mar. 29, 2019 USD ($)	Dec. 28, 2018 USD ($)	Sep. 28, 2018 USD ($)	Jun. 29, 2018 USD ($)	Mar. 30, 2018 USD ($)	Jan. 03, 2020 USD ($)	Dec. 28, 2018 USD ($)	Dec. 29, 2017 USD ($)	Feb. 12, 2020 shareholder
Quarterly Operating Results Unaudited [Line Items]
Fiscal year term									53 weeks	52 weeks	52 weeks
Amortization of intangible assets									$ 35.0	$ 37.3	$ 36.1
Merger costs										2.6
Restructuring charge										10.1
CEO retirement agreement expense									20.0	18.9	18.1
Loss on extinguishment of debt									0.0	4.6	0.0
Subsequent Event [Member]
Quarterly Operating Results Unaudited [Line Items]
Number of stockholders \| shareholder												1,597
Operating Income (Loss) [Member]
Quarterly Operating Results Unaudited [Line Items]
Amortization of intangible assets	$ 8.6	$ 8.8	$ 8.8	$ 8.8	$ 8.7	$ 9.6	$ 9.7	$ 9.3	35.0	37.3	36.1
Merger costs									12.8
Acquisition and integration costs				$ 0.3		0.3	2.3	0.3	(0.3)	2.9	2.3
Restructuring charge						0.2	9.2		0.0	9.4	$ 0.0
CEO retirement agreement expense										2.6
U.K. facility relocation costs					0.2	$ 0.2	0.4	$ 0.2		$ 1.0
Reversal of deferred income tax valuation allowances									45.9
Tax expense related to prior year tax positions									$ 0.8
Other Nonoperating Income (Expense) [Member]
Quarterly Operating Results Unaudited [Line Items]
Loss on extinguishment of debt					$ (4.6)
CEO Retirement Agreement [Member] \| Operating Income (Loss) [Member]
Quarterly Operating Results Unaudited [Line Items]
CEO retirement agreement expense							$ 2.6