Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1,2)
-URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227

Name:	us-gaap_GrossProfit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

General General (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
General General (Details) - USD ($) $ in Millions	Jun. 26, 2020	Jun. 28, 2019	Jun. 26, 2020	Jun. 28, 2019	Dec. 27, 2019
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Gross profit	$ 78.7	$ 97.6	$ 147.2	$ 192.7
Restatement Adjustment [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Gross profit		$ 1.3		$ 3.1	$ 5.8