Earnings per Share and Stock Repurchase Program (Details) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 24, 2023 USD ($) $ / shares shares	Sep. 25, 2022 USD ($) $ / shares shares	Sep. 24, 2023 USD ($) $ / shares shares	Sep. 25, 2022 USD ($) $ / shares shares	Jul. 31, 2023 USD ($)	Dec. 31, 2022	Feb. 06, 2019 USD ($)
Net (loss) income
Net income | $	$ 65.8	$ 58.7	$ 206.4	$ 182.9
Shares
Shares (in shares) | shares	33,400,000	33,400,000	33,400,000	33,500,000
Per Share Amount
Net income (in dollars per share) | $ / shares	$ 1.97	$ 1.76	$ 6.17	$ 5.46
Dilutive securities, principally common stock options
Common stock equivalents (in shares) | shares	100,000	100,000	100,000	200,000
Common stock equivalents (in dollars per share) | $ / shares	$ (0.01)	$ (0.01)	$ (0.02)	$ (0.03)
Net (loss) income
Net income | $	$ 65.8	$ 58.7	$ 206.4	$ 182.9
Weighted average number of shares:
Shares (in shares) | shares	33,500,000	33,500,000	33,500,000	33,700,000
Securities not included in the computation of diluted EPS
Net income (in dollars per share) | $ / shares	$ 1.96	$ 1.75	$ 6.15	$ 5.43
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	22,013	29,333	68,569	462,956
Stock Repurchased During Period, Value | $	$ 4.0	$ 3.9	$ 11.7	$ 65.1
Class A
Common Stock
Common Stock, votes per share (Number of votes)	1		1			1
Shares repurchased
Value of shares of the entity's Class A common stock authorized to be repurchased | $					$ 150.0		$ 150.0
Class B
Common Stock
Common Stock, votes per share (Number of votes)	10		10			10
February 6, 2019 | Class A
Shares repurchased
Remaining authorized repurchase amount | $	$ 16.3		$ 16.3