Earnings per Share and Stock Repurchase Program (Details) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 25, 2023 USD ($) $ / shares shares	Jun. 26, 2022 USD ($) $ / shares shares	Jun. 25, 2023 USD ($) $ / shares shares	Jun. 26, 2022 USD ($) $ / shares shares	Dec. 31, 2022	Feb. 06, 2019 USD ($)
Net (loss) income
Net income | $	$ 75.9	$ 69.7	$ 140.6	$ 124.2
Shares
Shares (in shares) | shares	33,500,000	33,500,000	33,400,000	33,600,000
Per Share Amount
Net income (in dollars per share) | $ / shares	$ 2.27	$ 2.08	$ 4.21	$ 3.70
Dilutive securities, principally common stock options
Common stock equivalents (in shares) | shares	100,000	100,000	100,000	100,000
Common stock equivalents (in dollars per share) | $ / shares	$ (0.01)	$ (0.01)	$ (0.02)	$ (0.02)
Net (loss) income
Net income | $	$ 75.9	$ 69.7	$ 140.6	$ 124.2
Weighted average number of shares:
Shares (in shares) | shares	33,600,000	33,600,000	33,500,000	33,700,000
Securities not included in the computation of diluted EPS
Net income (in dollars per share) | $ / shares	$ 2.26	$ 2.07	$ 4.19	$ 3.68
Dilutive securities, principally common stock options
Options to purchase shares of Class A common stock, anti-dilutive | shares	0	0	0	0
Shares repurchased
Number of shares repurchased | shares	24,083	140,233	46,556	433,623
Stock Repurchased During Period, Value | $	$ 4.0	$ 18.2	$ 7.7	$ 61.1
Class A
Common Stock
Common Stock, votes per share (Number of votes)	1		1		1
Class B
Common Stock
Common Stock, votes per share (Number of votes)	10		10		10
February 6, 2019 | Class A
Shares repurchased
Value of shares of the entity's Class A common stock authorized to be repurchased | $						$ 150.0
Remaining authorized repurchase amount | $	$ 20.3		$ 20.3