Other Comprehensive Earnings (Loss) - Schedule of Accumulated Other Comprehensive Earnings (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 27, 2020	Dec. 29, 2019	Dec. 30, 2018
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ (184,220)
Current period other comprehensive earnings (loss)	6,498	$ 36,598	$ (45,180)
Reclassifications from AOCE to earnings	(17,231)	73,696	11,594
Ending balance	(194,953)	(184,220)
Pension and Postretirement Amounts
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(36,129)	(143,134)	(110,971)
Current period other comprehensive earnings (loss)	(6,609)	14,850	(23,763)
Reclassifications from AOCE to earnings	2,021	92,155	9,665
Ending balance	(40,717)	(36,129)	(143,134)
Pension and Postretirement Amounts | Cumulative Effect, Period of Adoption, Adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			(18,065)
Gains (Losses) on Derivative Instruments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(5,232)
Current period other comprehensive earnings (loss)	2,380
Reclassifications from AOCE to earnings	(19,252)
Ending balance	(22,104)	(5,232)
Gains (Losses) on Derivative Instruments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(5,232)	1,549	(32,827)
Current period other comprehensive earnings (loss)		11,678	36,107
Reclassifications from AOCE to earnings		(18,459)	1,929
Ending balance		(5,232)	1,549
Gains (Losses) on Derivative Instruments | Cumulative Effect, Period of Adoption, Adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			(3,660)
Unrealized Holding Gains (Losses) on Available for-Sale Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(230)	(744)	1,034
Current period other comprehensive earnings (loss)	640	514	(2,000)
Reclassifications from AOCE to earnings	0	0	0
Ending balance	410	(230)	(744)
Unrealized Holding Gains (Losses) on Available for-Sale Securities | Cumulative Effect, Period of Adoption, Adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			222
Foreign Currency Translation Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(142,629)	(152,185)	(96,661)
Current period other comprehensive earnings (loss)	10,087	9,556	(55,524)
Reclassifications from AOCE to earnings	0	0	0
Ending balance	(132,542)	(142,629)	(152,185)
Foreign Currency Translation Adjustments | Cumulative Effect, Period of Adoption, Adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			0
Accumulated Other Comprehensive Loss
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(184,220)	(294,514)	(239,425)
Ending balance	$ (194,953)	$ (184,220)	(294,514)
Accumulated Other Comprehensive Loss | Cumulative Effect, Period of Adoption, Adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			$ (21,503)