Commitments and Contingencies - Narrative (Detail) - USD ($) $ in Millions	6 Months Ended
Jun. 29, 2019	Dec. 29, 2018
Loss Contingencies [Line Items]
Benefit recorded in operating expenses related to settlement	$ 11.6
Patent Related Litigation Matter
Loss Contingencies [Line Items]
Loss contingency accrual		$ 30.9

Amount of gain (loss) recognized in settlement of litigation and insurance claims. Excludes claims within an insurance entity's normal claims settlement process.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=118942415&loc=d3e14326-108349

Name:	us-gaap_GainLossRelatedToLitigationSettlement
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration