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Defined Benefit Plans - Components of Net Periodic Benefit Income for Pension Benefits (Detail) - Net Periodic Benefit Cost [Member] - Pension Benefits [Member] - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 27, 2025
Sep. 28, 2024
Sep. 27, 2025
Sep. 28, 2024
Defined Benefit Plan Disclosure [Line Items]        
Interest cost $ 2.9 $ 5.2 $ 8.6 $ 17.5
Expected return on plan assets (2.7) (6.8) (8.1) (23.3)
Net periodic benefit cost (income) $ 0.2 $ (1.6) $ 0.5 $ (5.8)