Segments Segments (Sales Based on Customer Location and Property, Plant and Equipment by Geographic Area) (Details) - USD ($) $ in Thousands	3 Months Ended						6 Months Ended		9 Months Ended		12 Months Ended
	Jun. 28, 2025	Mar. 29, 2025	Dec. 28, 2024	Jun. 29, 2024	Mar. 30, 2024	Dec. 30, 2023	Mar. 29, 2025	Mar. 30, 2024	Jun. 28, 2025	Jun. 29, 2024	Sep. 27, 2025	Sep. 28, 2024	Sep. 30, 2023
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 969,582	$ 934,022	$ 907,882	$ 914,135	$ 920,208	$ 855,222	$ 1,841,904	$ 1,775,430	$ 2,811,486	$ 2,689,565	$ 3,860,624	$ 3,608,960	$ 3,316,190
Property, Plant and Equipment, Net	$ 988,125	$ 960,015	$ 934,087	$ 904,710	$ 886,045	$ 856,462	$ 960,015	$ 886,045	$ 988,125	$ 904,710	1,019,906	928,588	826,260
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales											2,432,811	2,319,352	2,153,121
Property, Plant and Equipment, Net											704,707	636,828	546,335
Germany
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales											247,354	164,794	203,661
UNITED KINGDOM
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, Plant and Equipment, Net											138,168	128,363	126,059
Other (Non-US)
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales											1,180,459	1,124,814	959,408
Property, Plant and Equipment, Net											$ 177,031	$ 163,397	$ 153,866