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Document and Entity Information
Dec. 20, 2021
Cover [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date Dec. 20, 2021
Entity Registrant Name INTERDIGITAL, INC.
Entity Incorporation, State or Country Code PA
Entity File Number 1-33579
Entity Tax Identification Number 82-4936666
Entity Address, Address Line One 200 Bellevue Parkway
Entity Address, Address Line Two Suite 300
Entity Address, City or Town Wilmington
Entity Address, State or Province DE
Entity Address, Postal Zip Code 19809-3727
City Area Code 302
Local Phone Number 281-3600
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company false
Entity Central Index Key 0001405495
Title of 12(b) Security Common Stock, par value $0.01 per share
Trading Symbol IDCC
Security Exchange Name NASDAQ