The measurement period for accounting for the tax effects of the Tax Cuts and Jobs Act of 2017.

No definition available.

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- Definition

Number of years of cumulative pre-tax losses incurred by the entity.

+ References

No definition available.

+ Details

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- Definition

Amount of valuation allowance charge reducing the majority of deferred tax assets.

+ References

No definition available.

+ Details

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Period Type:	instant

- References

No definition available.

+ Details

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- Definition

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319

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- Definition

Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 6.I)
-URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319

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- Definition

Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 45
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=84176650&loc=d3e32123-109318

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SIGNIFICANT ACCOUNTING POLICIES - Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended	12 Months Ended
	Jul. 01, 2018	Dec. 31, 2017	Sep. 24, 2017	Jul. 01, 2018	Dec. 31, 2017
SIGNIFICANT ACCOUNTING POLICIES
Statutory rate (as a percent)				21.00%	35.00%
Measurement period					1 year
Number of years of pre-tax losses		3 years	3 years
Increase in valuation allowance	$ 10.1			$ 24.4
Valuation allowance against majority of deferred tax assets		$ 109.7			$ 109.7
Valuation allowance	$ 134.1			$ 134.1