Goodwill and Other Intangible Assets - Schedule of Finite-Lived Intangible Assets (Details) - USD ($) $ in Millions	Dec. 27, 2020	Dec. 29, 2019
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 654.9	$ 617.6
Accumulated Amortization	(504.3)	(465.9)
Carrying Value	150.6	151.7
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	371.7	370.9
Accumulated Amortization	(329.1)	(313.5)
Carrying Value	42.6	57.4
Tradenames
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	58.6	58.6
Accumulated Amortization	(1.8)	(1.7)
Carrying Value	56.8	56.9
Computer software & technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	224.6	188.1
Accumulated Amortization	(173.4)	(150.7)
Carrying Value	$ 51.2	$ 37.4

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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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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Amount before accumulated amortization of intangible assets, excluding goodwill.

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Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
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