Earnings per Share and Stock Repurchase Program (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 26, 2023	Jul. 31, 2023	Feb. 06, 2019
Net (loss) income
Net income	$ 72.6	$ 64.7
Shares
Shares (in shares)	33,400,000	33,400,000
Per Share Amount
Net income (in dollars per share)	$ 2.17	$ 1.94
Dilutive securities, principally common stock options
Common stock equivalents (in shares)	100,000	100,000
Common stock equivalents (in dollars per share)		$ (0.01)
Net (loss) income
Net income	$ 72.6	$ 64.7
Weighted average number of shares:
Shares (in shares)	33,500,000	33,500,000
Securities not included in the computation of diluted EPS
Net income (in dollars per share)	$ 2.17	$ 1.93
Dilutive securities, principally common stock options
Options to purchase shares of Class A common stock, anti-dilutive	0	0
Shares repurchased
Number of shares repurchased	19,750	22,473
Cost of shares repurchased	$ 4.0	$ 3.7
Class A
Shares repurchased
Value of shares of the entity's Class A common stock authorized to be repurchased			$ 150.0	$ 150.0
February 6, 2019 | Class A
Shares repurchased
Remaining authorized repurchase amount	$ 8.0