Accumulated Other Comprehensive Income (Loss) (Changes in AOCIL by Component) (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
AOCIL Attributable to Parent, Net of Tax [Roll Forward]
Beginning of year	$ 1,806,040	$ 1,786,534	$ 1,828,817	$ 1,718,280	$ 1,677,741	$ 1,601,757	$ 1,828,817	$ 1,601,757	$ 1,828,817	$ 1,601,757	$ 1,828,817	$ 1,601,757
Other comprehensive income (loss), net of tax	54,939	25,123	(39,183)	(4,596)	(11,359)	33,040	(14,060)	21,681	40,879	17,085	45,093	51,788	$ 56,442
End of year	1,913,046	1,806,040	1,786,534	1,761,559	1,718,280	1,677,741	1,806,040	1,718,280	1,913,046	1,761,559	1,992,555	1,828,817	1,601,757
Accumulated foreign currency translation
AOCIL Attributable to Parent, Net of Tax [Roll Forward]
Beginning of year			(95,522)			(140,477)	(95,522)	(140,477)	(95,522)	(140,477)	(95,522)	(140,477)
OCI before reclassifications											8,252	44,966
Amounts reclassified from AOCIL											12,656	(11)
Other comprehensive income (loss), net of tax											20,908	44,955
End of year											(74,614)	(95,522)	(140,477)
Accumulated retirement liability
AOCIL Attributable to Parent, Net of Tax [Roll Forward]
Beginning of year			(107,290)			(113,605)	(107,290)	(113,605)	(107,290)	(113,605)	(107,290)	(113,605)
OCI before reclassifications											15,334	(1,811)
Amounts reclassified from AOCIL											8,644	8,126
Other comprehensive income (loss), net of tax											23,978	6,315
End of year											(83,312)	(107,290)	(113,605)
Accumulated gain (loss) on derivatives
AOCIL Attributable to Parent, Net of Tax [Roll Forward]
Beginning of year			0			(518)	0	(518)	0	(518)	0	(518)
OCI before reclassifications											617	69
Amounts reclassified from AOCIL											(410)	449
Other comprehensive income (loss), net of tax											207	518
End of year											207	0	(518)
Total
AOCIL Attributable to Parent, Net of Tax [Roll Forward]
Beginning of year	(216,872)	(241,995)	(202,812)	(232,919)	(221,560)	(254,600)	(202,812)	(254,600)	(202,812)	(254,600)	(202,812)	(254,600)	(311,042)
OCI before reclassifications											24,203	43,224
Amounts reclassified from AOCIL											20,890	8,564
Other comprehensive income (loss), net of tax	54,939	25,123	(39,183)	(4,596)	(11,359)	33,040	(14,060)	21,681	40,879	17,085	45,093	51,788	56,442
End of year	$ (161,933)	$ (216,872)	$ (241,995)	$ (237,515)	$ (232,919)	$ (221,560)	$ (216,872)	$ (232,919)	$ (161,933)	$ (237,515)	$ (157,719)	$ (202,812)	$ (254,600)