Pension Plans - Net Periodic Pension Cost (Detail) - Pension Plan - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Net periodic benefit cost:
Service cost	$ 23.5	$ 25.1	$ 22.7
Interest cost	56.4	52.8	56.1
Expected return on plan assets	(91.5)	(88.6)	(83.4)
Amortization of unrecognized loss	25.2	32.7	27.9
Amortization of prior service credit	(0.9)	(1.2)	(1.1)
Settlement loss	0.0	0.0	0.1
Net periodic benefit cost	12.7	20.8	22.3
Changes in benefit obligations recognized in OCI, net of tax:
Net (gain) loss	31.9	35.2	(30.3)
Prior service cost	0.4	1.7	0.7
Total recognized in OCI	$ 32.3	$ 36.9	$ (29.6)