Retirement Plans - Changes in Company's Assets and Related Obligations for its Pension Plans (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Jan. 01, 2022	Jan. 02, 2021
Change in projected benefit obligations:
Projected benefit obligations at beginning of the year	$ 434.3	$ 455.8
Service cost pertaining to benefits earned during the year	5.3	6.9	$ 6.4
Interest cost on projected benefit obligations	13.2	12.8	14.2
Actuarial gains	(107.8)	(26.6)
Benefits paid to plan participants	(16.8)	(14.6)
Projected benefit obligations at end of the year	328.2	434.3	455.8
Change in fair value of pension assets:
Fair value of pension assets at beginning of the year	323.0	305.0
Actual return (loss) on plan assets	(58.7)	30.1
Benefits paid to plan participants	(16.7)	(14.6)
Fair value of pension assets at end of the year	251.4	323.0	$ 305.0
Funded status	(76.8)	(111.3)
Amounts recognized in the consolidated balance sheets:
Current liabilities	(3.9)	(3.9)
Accrued pension liabilities	(72.9)	(107.4)
Net amount recognized	(76.8)	(111.3)
Funded status of pension plans and SERP (supplemental):
Funded status of qualified defined benefit plans and SERP	(76.8)	(111.3)
Nonqualified trust assets	46.6	45.6
Net funded status of pension plans and SERP (supplemental)	(38.0)	(73.3)
SERP [Member]
Change in fair value of pension assets:
Company contributions	3.8	2.5
Funded status of pension plans and SERP (supplemental):
Nonqualified trust assets	$ 38.8	$ 38.0