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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares
shares in Thousands
Mar. 27, 2021
Dec. 26, 2020
Statement of Financial Position [Abstract]    
Common stock, par value $ 1 $ 1
Common stock, shares authorized 1,000,000 1,000,000
Common stock, shares issued 695,725 690,982
Treasury stock at cost, shares 2,173 0