Document and Entity Information
May 21, 2020
Document And Entity Information [Line Items]  
Amendment Flag false
Entity Central Index Key 0001437107
Document Type 8-K
Document Period End Date May 21, 2020
Entity Registrant Name Discovery, Inc.
Entity Incorporation State Country Code DE
Entity File Number 001-34177
Entity Tax Identification Number 35-2333914
Entity Address, Address Line One 8403 Colesville Road
Entity Address, City or Town Silver Spring
Entity Address, State or Province MD
Entity Address, Postal Zip Code 20910
City Area Code 240
Local Phone Number 662-2000
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Entity Emerging Growth Company false
Common Class A [Member]  
Document And Entity Information [Line Items]  
Security 12b Title Series A Common Stock
Trading Symbol DISCA
Security Exchange Name NASDAQ
Common Class B [Member]  
Document And Entity Information [Line Items]  
Security 12b Title Series B Common Stock
Trading Symbol DISCB
Security Exchange Name NASDAQ
Common Class C [Member]  
Document And Entity Information [Line Items]  
Security 12b Title Series C Common Stock
Trading Symbol DISCK
Security Exchange Name NASDAQ