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Supplemental Cash Flow Information - Changes In Operating Assets And Liabilities, Net of Acquisitions (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 03, 2021	Dec. 29, 2019	Dec. 30, 2018
Supplemental Cash Flow Elements [Abstract]
(Increase) decrease in trade accounts receivable	$ 55.9	$ 46.0	$ (32.0)
(Increase) decrease in prepaid expenses and other assets	21.8	6.0	(9.5)
(Increase) decrease in ROU assets	0.2	0.7	0.0
Increase (decrease) increase in accounts payable and accrued liabilities	10.5	(43.0)	17.0
Increase (decrease) in operating lease liabilities	(21.1)	(21.6)	0.0
Increase (decrease) in accrued payroll and related taxes	71.9	(13.2)	(21.0)
Increase (decrease) in accrued workers’ compensation and other claims	(4.9)	(1.9)	1.9
Increase (decrease) in income and other taxes	(14.0)	0.6	2.1
Total changes in operating assets and liabilities, net of acquisitions	$ 120.3	$ (26.4)	$ (41.5)

X

- Definition

Increase (Decrease) in Operating Lease Liabilities

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- Definition

Increase (Decrease) in Right-of-use Assets, Real Estate and Equipment

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No definition available.

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X

- Definition

The increase (decrease) during the reporting period in the amounts payable to vendors for goods and services received and the amount of obligations and expenses incurred but not paid.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
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- Definition

The increase (decrease) during the reporting period in amount due within one year (or one business cycle) from customers for the credit sale of goods and services.

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- Definition

The increase (decrease) during the reporting period of all taxes owed but not paid, including income, property and other taxes.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
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- Definition

The increase (decrease) during the reporting period in the aggregate amount of obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits.

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- Definition

The increase (decrease) during the reporting period of all assets and liabilities used in operating activities.

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- Definition

Amount of increase (decrease) in prepaid expenses, and assets classified as other.

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- Definition

The increase (decrease) during the reporting period in the amount due for insurance (or actual expenses) to cover the medical expenses and lost income for employees that are injured during the course of doing work-related activities.

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