Postretirement Plans - Summary of Components of Net Periodic Benefit Costs and Other Amounts Recognized in Other Comprehensive Income (Loss) (Detail) - U.S. Postretirement Health Care Plans - USD ($) $ in Millions	12 Months Ended
	Jan. 01, 2022	Jan. 02, 2021	Dec. 28, 2019
Net periodic benefit cost:
Interest cost	$ 1.1	$ 1.5	$ 1.9
Expected return on plan assets	(0.6)	(0.6)	(0.7)
Amortization of unrecognized gain	0.0	0.0	(0.8)
Net periodic benefit cost	0.5	0.9	0.4
Changes in benefit obligations recognized in OCI, net of tax:
Net (gain) loss	$ (1.0)	$ 1.9	$ 2.4