Supplemental Stockholders' Equity Information - Reclassifications Out of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 26, 2022	Jun. 30, 2023	Jun. 26, 2022
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other components of net periodic benefit (income)/costs	$ (684)	$ 1,624	$ (1,369)	$ 3,146
Total reclassification, before tax	(60,976)	(85,641)	(92,734)	(91,478)
Income tax expense	(14,402)	(23,864)	(23,839)	(24,976)
Total reclassification, net of tax	$ (46,574)	$ (61,777)	(68,895)	$ (66,502)
Amounts reclassified from accumulated other comprehensive loss
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total reclassification, before tax			3,106
Income tax expense			822
Total reclassification, net of tax			2,284
Amounts reclassified from accumulated other comprehensive loss | Amortization of prior service credit
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other components of net periodic benefit (income)/costs			(972)
Amounts reclassified from accumulated other comprehensive loss | Amortization of actuarial loss
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other components of net periodic benefit (income)/costs			$ 4,078