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Goodwill and Other Intangible Assets - Goodwill (Details) - USD ($) $ in Millions	Dec. 27, 2020	Dec. 29, 2019
Goodwill [Line Items]
Gross value	$ 737.2	$ 708.9
Less accumulated impairment	253.3	253.3
Net	483.9	455.6
US
Goodwill [Line Items]
Gross value	127.6	111.1
Less accumulated impairment	13.8	13.8
Net	113.8	97.3
KGS
Goodwill [Line Items]
Gross value	609.6	597.8
Less accumulated impairment	239.5	239.5
Net	$ 370.1	$ 358.3

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(10)(1))
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- Definition

Amount before accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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-Topic 350
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+ References

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