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Pension Plans - Net Periodic Pension Cost (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 29, 2018
Dec. 30, 2017
Dec. 31, 2016
Changes in benefit obligations recognized in OCI, net of tax:      
Total recognized in OCI $ 59.0 $ (11.8) $ 62.6
Pension Plan      
Net periodic benefit cost:      
Service cost 25.1 22.7 19.3
Interest cost 52.8 56.1 56.5
Expected return on plan assets (88.6) (83.4) (81.0)
Amortization of unrecognized loss 32.7 27.9 31.3
Amortization of prior service credit (1.2) (1.1) (1.1)
Settlement loss 0.0 0.1 0.0
Net periodic benefit cost 20.8 22.3 25.0
Changes in benefit obligations recognized in OCI, net of tax:      
Net (gain) loss 35.2 (30.3) 43.3
Prior service cost 1.7 0.7 0.6
Total recognized in OCI $ 36.9 $ (29.6) $ 43.9