Supplemental Stockholders' Equity Information - Reclassifications Out of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 28, 2021	Mar. 29, 2020
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of revenue (excluding depreciation and amortization)	$ 2,599	$ 2,314
Total reclassification, before tax	50,570	38,860
Income tax expense	9,461	6,006
Total reclassification, net of tax	41,109	$ 32,854
Amounts reclassified from accumulated other comprehensive loss
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total reclassification, before tax	6,406
Income tax expense	1,718
Total reclassification, net of tax	4,688
Amounts reclassified from accumulated other comprehensive loss | Amortization of prior service credit
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of revenue (excluding depreciation and amortization)	(1,322)
Amounts reclassified from accumulated other comprehensive loss | Amortization of actuarial loss
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of revenue (excluding depreciation and amortization)	$ 7,728