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

Statements of Stockholders' Equity (Parenthetical) [Abstract]

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Aggregate dividends paid during the period for each share of common stock outstanding.

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Number of shares of capital stock issued (purchased by employees) in connection with an employee stock ownership plan.

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Number of shares that have been repurchased during the period and are being held in treasury.

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