Consolidated Statement of Shareholders' Equity Consolidated Statement of Shareholders' Equity (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018
Shares issued, (net of shares forfeitures) under stock incentive plans, Shares	(1,917)	(13,836)	36,588	(135,700)
Shares issued for stock options exercised, net, Shares	62,114	321,546	412,211	1,317,628
Cash dividends declared per share	$ 0.10	$ 0.08	$ 0.30	$ 0.24
Issuance of treasury shares, Shares	1,831	3,005	5,831	6,006
Purchase of common stock for treasury, Shares	(4,250,070)	(529,966)	(10,730,962)	(2,207,909)
Purchases of shares under employee stock plans, Shares	(3,440)	(1,993)	(361,899)	(199,391)