Annual report pursuant to Section 13 and 15(d)

Contingencies (Details)

v3.19.3.a.u2
Contingencies (Details)
$ in Millions
23 Months Ended
Nov. 15, 2019
patent
Jul. 02, 2018
patent
legal_entity
Dec. 28, 2019
USD ($)
claim
state
site
Loss Contingencies [Line Items]      
Site contingency, number of sites | site     3
Estimated environmental liability | $     $ 3
Hauck et al. Litigation      
Loss Contingencies [Line Items]      
Number of claims filed | claim     3
Number of plaintiffs | claim     6
Number of states | state     4
Quarterhill Inc. Litigation      
Loss Contingencies [Line Items]      
Number of plaintiffs | legal_entity   3  
Number of claims | legal_entity   3  
Monterey Research Litigation      
Loss Contingencies [Line Items]      
Number of patents allegedly infringed 6    
Aquila | Quarterhill Inc. Litigation      
Loss Contingencies [Line Items]      
Number of patents allegedly infringed   2  
Collabo | Quarterhill Inc. Litigation      
Loss Contingencies [Line Items]      
Number of patents allegedly infringed   1  
Polaris | Quarterhill Inc. Litigation      
Loss Contingencies [Line Items]      
Number of patents allegedly infringed   2