Stockholders' Equity (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 27, 2020	Dec. 27, 2015	Dec. 29, 2019
Class of Stock [Line Items]
Class A common stock, right to elect percentage of the board of directors	30.00%
Class B Common Stock available for conversion into Class A Common Stock (in shares)	781,724		803,404
Class B common stock, right to elect percentage of the board of directors	70.00%
Proceeds from Warrant Exercises		$ 101.1
Stock repurchased during the period	$ 84.9
Amount remaining under share repurchase authorization	$ 16.2
Minimum consideration for each share of preferred stock (in usd per share)	$ 100
Preferred stock issued (in shares)	0
Preferred stock outstanding (in shares)	0
Adolph Ochs Family Trust
Class of Stock [Line Items]
Class B common stock ownership percentage	95.00%