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Pension and Other Postretirement Benefit Plans - Schedule of Pension Plans' Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 01, 2022	Jul. 02, 2021	Jul. 01, 2022	Jul. 02, 2021
Component:
Service cost	$ 1,709	$ 1,735	$ 5,127	$ 5,206
Interest cost	13,784	11,785	41,352	35,354
Expected return on plan assets	(23,263)	(25,427)	(69,789)	(76,282)
Amortization of previously unrecognized items	3,092	4,032	9,276	12,095
Net periodic benefit cost	$ (4,678)	$ (7,875)	$ (14,034)	$ (23,627)

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Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan.

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Amount of cost recognized for passage of time related to defined benefit plan.

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