Description of Business and Basis of Presentation - Asset Impairment (Details) $ in Millions	3 Months Ended	6 Months Ended
Jun. 27, 2020 USD ($)	Jun. 27, 2020 USD ($)
Accounting Policies [Abstract]
Discount rate used in impairment analysis (percent)		8.00%
Asset impairment charges for certain stores and other assets	$ 2.4	$ 13.8
Estimated fair value of impaired assets	19.5	19.5
Write-off of certain obsolete software assets	$ 1.1	$ 1.1

The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section 45
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