Pension Plans - Net Periodic Pension (Benefit) Cost (Details) - Pension Plans, Defined Benefit - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 29, 2024	Jul. 01, 2023	Jun. 29, 2024	Jul. 01, 2023
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 5.0	$ 4.5	$ 10.0	$ 9.4
Interest cost	16.4	16.4	32.8	32.7
Expected return on plan assets	(25.3)	(26.1)	(50.8)	(52.3)
Amortization of unrecognized loss	2.5	0.4	4.6	0.7
Net periodic postretirement health care cost	$ (1.4)	$ (4.8)	$ (3.4)	$ (9.5)

Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan.

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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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Amount of net periodic benefit cost (credit) for defined benefit plan.

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Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.

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