Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 29, 2019	Dec. 30, 2018
Common Stock
Cash dividend per share (in dollars per share)	$ 1.00	$ 1.00	$ 1.00
Class B Common Stock
Cash dividend per share (in dollars per share)	$ 1.00	$ 1.00	$ 1.00
Class B common stock shares issued (in shares)		19,224	20,296