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Segment Disclosures - Depreciation and Amortization Expense Included in SG&A Expenses (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 04, 2021	Jun. 28, 2020	Jul. 04, 2021	Jun. 28, 2020
Earnings (loss) from Operations
Depreciation and amortization			$ 14.1	$ 12.0
Professional & Industrial
Earnings (loss) from Operations
Depreciation and amortization	$ 1.4	$ 1.3	2.8	2.7
Science, Engineering & Technology
Earnings (loss) from Operations
Depreciation and amortization	3.3	1.1	4.3	2.1
Education
Earnings (loss) from Operations
Depreciation and amortization	0.9	0.9	1.9	1.8
Outsourcing & Consulting
Earnings (loss) from Operations
Depreciation and amortization	0.2	0.2	0.4	0.3
International
Earnings (loss) from Operations
Depreciation and amortization	$ 0.5	$ 0.5	$ 1.0	$ 1.1

X

- Definition

The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585

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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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