Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 25, 2020	Sep. 27, 2019	Sep. 25, 2020	Sep. 27, 2019
Earnings Per Share [Abstract]
Net earnings available to common shareholders	$ 114,115	$ 84,132	$ 215,765	$ 259,018
Weighted average shares outstanding for basic earnings per share	167,102	166,848	167,248	166,383
Dilutive effect of stock options computed using the treasury stock method and the average market price	4,551	4,929	4,367	5,178
Weighted average shares outstanding for diluted earnings per share	171,653	171,777	171,615	171,561
Basic earnings per share	$ 0.68	$ 0.50	$ 1.29	$ 1.56
Diluted earnings per share	$ 0.66	$ 0.49	$ 1.26	$ 1.51
Antidilutive securities excluded from the computation of diluted earnings per share	1,281	802