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Pension Plans - Net Periodic Pension Cost (Credit) (Detail) - Pension Plan - USD ($)
$ in Millions
 12 Months Ended
Dec. 28, 2024
Dec. 30, 2023
Dec. 31, 2022
Net periodic benefit cost (credit):      
Service cost $ 19.9 $ 18.8 $ 26.5
Interest cost 65.4 65.3 44.4
Expected return on plan assets (101.5) (104.7) (99.2)
Amortization of unrecognized loss 9.2 1.5 18.0
Amortization of prior service cost 0.1 0.1 0.1
Net periodic benefit cost (credit) (6.9) (19.0) (10.2)
Changes in benefit obligations recognized in OCI, net of tax:      
Net (gain) loss 14.9 (19.9) 59.6
Prior service credit 0.0 0.0 (0.1)
Total recognized in OCI $ 14.9 $ (19.9) $ 59.5