Business Segments - Company's Long-Lived Assets (Primarily Property, Plant and Equipment) (Detail) - USD ($) $ in Millions	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Segment Reporting Information [Line Items]
Long-lived assets	$ 267.1	$ 301.8	$ 130.9
United States [Member]
Segment Reporting Information [Line Items]
Long-lived assets	222.2	247.2	117.1
Foreign [Member]
Segment Reporting Information [Line Items]
Long-lived assets	$ 44.9	$ 54.6	$ 13.8

Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9038-108599

Name:	us-gaap_NoncurrentAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant