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Significant Accounting Policies (Property, Plant and Equipment) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Buildings
Property, plant and equipment
Useful life	30 years
Machinery and equipment
Property, plant and equipment
Useful life	5 years
Furniture and fixtures
Property, plant and equipment
Useful life	5 years
Computer equipment and software | Minimum
Property, plant and equipment
Useful life	2 years
Computer equipment and software | Maximum
Property, plant and equipment
Useful life	7 years
Selling, general and administrative | Retail stores
Property, plant and equipment
Impairment losses	$ 0.7	$ 1.9	$ 1.3
Restructuring charges
Property, plant and equipment
Loss on disposal of assets	0.5	0.6	0.4
Restructuring charges | Retail stores
Property, plant and equipment
Impairment losses	$ 0.6	$ 1.7	$ 8.0

X

- Definition

Amount of gain (loss) on sale or disposal of property, plant and equipment assets, excluding oil and gas property and timber property.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=109226348&loc=d3e2443-110228

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
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-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230

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+ References

No definition available.

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

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- Definition

The charge against earnings resulting from the aggregate write down of tangible assets from their carrying value to their fair value.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=109222650&loc=d3e1361-107760

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