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Employee Benefit Plans - Benefit obligations in excess of fair value of plan assets (Details) - USD ($)
$ in Thousands
12 Months Ended
Nov. 24, 2019
Nov. 25, 2018
Nov. 26, 2017
Pension plans, defined benefit [Member]      
Change in benefit obligation [Roll Forward]      
Benefit obligation at beginning of year $ 1,136,720 $ 1,243,852  
Service cost 3,377 3,602 $ 3,427
Interest cost 41,341 36,070 36,853
Plan participants' contribution 665 570  
Actuarial loss (gain) 146,562 (69,602)  
Net curtailment loss 64 113  
Impact of foreign currency changes (2,210) (6,983)  
Plan settlements (436) (63)  
Net benefits paid (64,320) (70,839)  
Benefit obligation at end of year 1,261,763 1,136,720 1,243,852
Change in plan assets [Roll Forward]      
Fair value of plan assets at beginning of year 958,576 948,706  
Actual return on plan assets 182,309 (36,468)  
Employer contribution(3) 15,062 122,492  
Plan participants' contributions 665 570  
Plan settlements (436) (63)  
Impact of foreign currency changes (694) (5,822)  
Net benefits paid (64,320) (70,839)  
Fair value of plan assets at end of year 1,091,162 958,576 948,706
Unfunded status at end of year (170,601) (178,144)  
Other postretirement benefit plans, defined benefit [Member]      
Change in benefit obligation [Roll Forward]      
Benefit obligation at beginning of year 82,907 98,675  
Service cost 65 113 172
Interest cost 3,042 2,718 3,148
Plan participants' contribution 4,256 4,105  
Actuarial loss (gain) (2,903) (6,353)  
Net curtailment loss 0 0  
Impact of foreign currency changes 0 0  
Plan settlements 0 0  
Net benefits paid (15,232) (16,351)  
Benefit obligation at end of year 72,135 82,907 98,675
Change in plan assets [Roll Forward]      
Fair value of plan assets at beginning of year 0 0  
Actual return on plan assets 0 0  
Employer contribution(3) 10,976 12,246  
Plan participants' contributions 4,256 4,105  
Plan settlements 0 0  
Impact of foreign currency changes 0 0  
Net benefits paid (15,232) (16,351)  
Fair value of plan assets at end of year 0 0 $ 0
Unfunded status at end of year $ (72,135) $ (82,907)