Business Combination - Schedule of Preliminary Values Allocated to Intangible Assets and Useful Lives (Detail)	12 Months Ended
Jan. 01, 2019
Franchise rights
Business Acquisition [Line Items]
Useful life of finite lived intangible assets (in years)	40 years

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration