Condensed Consolidated Statements of Stockholders' Equity (Parenthetical) (Parentheticals) - $ / shares shares in Thousands	3 Months Ended
	Jun. 29, 2019	Mar. 30, 2019	Jun. 30, 2018	Mar. 31, 2018
Statements of Stockholders' Equity (Parenthetical) [Abstract]
Common Stock, Dividends, Per Share, Cash Paid	$ 0.30	$ 0.26	$ 0.26	$ 0.23
Contribution of shares to retirement plans	0	8,587	0	8,440
Acquisition of shares from stockholders	5,790	7,802	7,623	10,714
Sale of shares to stockholders	904	2,641	1,139	2,590