CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares	7 Months Ended	12 Months Ended
Dec. 31, 2015	Dec. 28, 2017	Dec. 29, 2016	May 28, 2015
Class B Common Stock [Member]
Common Stock, Dividends, Per Share, Cash Paid	$ 0.19	$ 0.45	$ 0.41	$ 0.35
Common Stock [Member]
Common Stock, Dividends, Per Share, Cash Paid	$ 0.21	$ 0.50	$ 0.45	$ 0.39

Aggregate dividends paid during the period for each share of common stock outstanding.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

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Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration