CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018
Statement of Stockholders' Equity [Abstract]
Purchase of treasury shares, shares acquired (in shares)	236,323	203,869	306,729	305,256
Stock plan exercises; shares acquired (in shares)	645	2,390	6,096	11,938
Stock options exercised; shares issued (in shares)	2,642	18,309	15,637	46,213
Stock awards; shares issued (in shares)	2,692	5,852	10,327	7,692
Cash dividends declared per share (in dollars per share)	$ 0.375	$ 0.375	$ 0.75	$ 0.75