Pension Plans - Net Periodic Pension Cost (Credit) (Detail) - Pension Plan - USD ($) $ in Millions	12 Months Ended
	Dec. 30, 2023	Dec. 31, 2022	Jan. 01, 2022
Net periodic benefit cost (credit):
Service cost	$ 18.8	$ 26.5	$ 28.8
Interest cost	65.3	44.4	42.3
Expected return on plan assets	(104.7)	(99.2)	(94.4)
Amortization of unrecognized loss	1.5	18.0	36.3
Amortization of prior service cost	0.1	0.1	0.1
Net periodic benefit cost (credit)	(19.0)	(10.2)	13.1
Changes in benefit obligations recognized in OCI, net of tax:
Net (gain) loss	(19.9)	59.6	(92.8)
Prior service credit	0.0	(0.1)	(0.1)
Total recognized in OCI	$ (19.9)	$ 59.5	$ (92.9)