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Accumulated Other Comprehensive Loss (Tables)
6 Months Ended
May 30, 2021
Equity [Abstract]  
Schedule of accumulated other comprehensive loss
The following is a summary of the components of "Accumulated other comprehensive loss," net of related income taxes: 
May 30,
2021
November 29,
2020
May 24,
2020
 (Dollars in thousands)
Pension and postretirement benefits$(217,809)$(222,345)$(260,370)
Derivative instruments(85,501)(74,456)(23,215)
Foreign currency translation losses(146,013)(158,641)(200,723)
Unrealized gains on marketable securities17,834 13,996 6,612 
Accumulated other comprehensive loss$(431,489)$(441,446)$(477,696)