Annual report pursuant to Section 13 and 15(d)

Document And Entity Information

v3.20.4
Document And Entity Information - USD ($)
$ in Billions
 12 Months Ended
Dec. 31, 2020
Jan. 31, 2021
Jun. 30, 2020
Document Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2020    
Document Transition Report false    
Entity File Number 001-35707    
Entity Registrant Name LIBERTY MEDIA CORPORATION    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 37-1699499    
Entity Address, Address Line One 12300 Liberty Boulevard    
Entity Address, City or Town Englewood    
Entity Address, State or Province CO    
Entity Address, Postal Zip Code 80112    
City Area Code 720    
Local Phone Number 875-5400    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity Public Float     $ 18.5
Current Fiscal Year End Date --12-31    
Document Fiscal Year Focus 2020    
Document Fiscal Period Focus FY    
Entity Central Index Key 0001560385    
Amendment Flag false    
Liberty Sirius XM Group Common Class A      
Document Information [Line Items]      
Title of 12(b) Security Series A Liberty SiriusXM Common Stock    
Trading Symbol LSXMA    
Security Exchange Name NASDAQ    
Entity Common Stock, Shares Outstanding   99,190,965  
Liberty Sirius XM Group Common Class B      
Document Information [Line Items]      
Title of 12(b) Security Series B Liberty SiriusXM Common Stock    
Trading Symbol LSXMB    
Security Exchange Name NASDAQ    
Entity Common Stock, Shares Outstanding   9,802,232  
Liberty Sirius Xm Group Common Class C      
Document Information [Line Items]      
Title of 12(b) Security Series C Liberty SiriusXM Common Stock    
Trading Symbol LSXMK    
Security Exchange Name NASDAQ    
Entity Common Stock, Shares Outstanding   229,056,782  
Liberty Braves Group Common Class A      
Document Information [Line Items]      
Title of 12(b) Security Series A Liberty Braves Common Stock    
Trading Symbol BATRA    
Security Exchange Name NASDAQ    
Entity Common Stock, Shares Outstanding   10,312,670  
Liberty Braves Group Common Class B      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   981,778  
Liberty Braves Group Common Class C      
Document Information [Line Items]      
Title of 12(b) Security Series C Liberty Braves Common Stock    
Trading Symbol BATRK    
Security Exchange Name NASDAQ    
Entity Common Stock, Shares Outstanding   40,958,175  
Liberty Formula One Group Common Class A      
Document Information [Line Items]      
Title of 12(b) Security Series A Liberty Formula One Common Stock    
Trading Symbol FWONA    
Security Exchange Name NASDAQ    
Entity Common Stock, Shares Outstanding   25,835,838  
Liberty Formula One Group Common Class B      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   2,446,606  
Liberty Formula One Group Common Class C      
Document Information [Line Items]      
Title of 12(b) Security Series C Liberty Formula One Common Stock    
Trading Symbol FWONK    
Security Exchange Name NASDAQ    
Entity Common Stock, Shares Outstanding   203,538,477