Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 27, 2019	Sep. 28, 2018	Sep. 27, 2019	Sep. 28, 2018
Earnings Per Share [Abstract]
Net earnings available to common shareholders	$ 84,132	$ 92,681	$ 259,018	$ 267,331
Weighted average shares outstanding for basic earnings per share	166,848	167,247	166,383	167,860
Dilutive effect of stock options computed using the treasury stock method and the average market price	4,929	5,790	5,178	6,124
Weighted average shares outstanding for diluted earnings per share	171,777	173,037	171,561	173,984
Basic earnings per share	$ 0.50	$ 0.55	$ 1.56	$ 1.59
Diluted earnings per share	$ 0.49	$ 0.54	$ 1.51	$ 1.54
Antidilutive securities excluded from the computation of diluted earnings per share	802	435