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Retirement Benefits (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 26, 2025	Sep. 27, 2024	Sep. 26, 2025	Sep. 27, 2024
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 1,162	$ 1,102	$ 3,454	$ 3,822
Interest cost	2,375	2,256	7,086	6,890
Expected return on assets	(2,917)	(2,543)	(8,724)	(7,610)
Amortization and other	(218)	835	148	2,478
Net periodic benefit cost	402	1,650	1,964	5,580
Postretirement Medical
Defined Benefit Plan Disclosure [Line Items]
Service cost	76	91	229	258
Interest cost	285	305	854	861
Amortization	(68)	53	(204)
Net periodic benefit cost	$ 293	$ 449	$ 879	$ 1,119

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The amount of gains or losses recognized in net periodic benefit cost. This element may be used to encapsulate any other periodic costs associated with defined benefit plans that are not separately disclosed.

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