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Pension Plans - Net Periodic Pension Cost (Detail) - Pension Plan - USD ($)
$ in Millions
12 Months Ended
Jan. 02, 2021
Dec. 28, 2019
Dec. 29, 2018
Net periodic benefit cost:      
Service cost $ 27.0 $ 23.5 $ 25.1
Interest cost 48.7 56.4 52.8
Expected return on plan assets (94.7) (91.5) (88.6)
Amortization of unrecognized loss 34.5 25.2 32.7
Amortization of prior service credit 0.0 (0.9) (1.2)
Net periodic benefit cost 15.5 12.7 20.8
Changes in benefit obligations recognized in OCI, net of tax:      
Net (gain) loss (31.6) 31.9 35.2
Prior service cost 0.1 0.4 1.7
Total recognized in OCI $ (31.5) $ 32.3 $ 36.9