Condensed Consolidated Statements of Stockholders' Equity (Parenthetical) (Parentheticals) - $ / shares shares in Thousands	3 Months Ended
	Jun. 26, 2021	Mar. 27, 2021	Jun. 27, 2020	Mar. 28, 2020
Statements of Stockholders' Equity (Parenthetical) [Abstract]
Common Stock, Dividends, Per Share, Cash Paid	$ 0.37	$ 0.32	$ 0.32	$ 0.30
Contribution of shares to retirement plans	0	6,786	0	7,398
Acquisition of shares from stockholders	4,059	5,731	6,714	9,142
Sale of shares to stockholders	721	1,515	492	2,239