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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares
3 Months Ended 6 Months Ended 12 Months Ended
Dec. 26, 2020
Sep. 26, 2020
Jun. 27, 2020
Mar. 28, 2020
Dec. 28, 2019
Jun. 29, 2019
Dec. 29, 2018
Jun. 30, 2018
Dec. 26, 2020
Dec. 28, 2019
Dec. 29, 2018
Increase (Decrease) in Stockholders' Equity                      
Cash dividends per share (USD per share) $ 0.125 $ 0.125 $ 0.125 $ 0.125 $ 0.200 $ 0.200 $ 0.180 $ 0.180      
Issuance of shares under employee stock plans (in shares)                 35,133 33,647 37,794
Issuance of shares under stock grant programs (in shares)                 390,720 309,628 348,208
Issuance of shares under deferred compensation plans (in shares)                 127,735 181,565 166,528
Repurchase of shares (in shares)                 756,397 0 860,669