Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2018	Sep. 29, 2017	Sep. 28, 2018	Sep. 29, 2017
Earnings Per Share [Abstract]
Net earnings available to common shareholders	$ 92,681	$ 75,460	$ 267,331	$ 216,020
Weighted average shares outstanding for basic earnings per share	167,247,000	168,069,000	167,860,000	167,592,000
Dilutive effect of stock options computed using the treasury stock method and the average market price	5,790,000	6,544,000	6,124,000	6,252,000
Weighted average shares outstanding for diluted earnings per share	173,037,000	174,613,000	173,984,000	173,844,000
Basic earnings per share	$ 0.55	$ 0.45	$ 1.59	$ 1.29
Diluted earnings per share	$ 0.54	$ 0.43	$ 1.54	$ 1.24
Antidilutive securities excluded from the computation of diluted earnings per share	435,000	18,000