Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies (Details)

v3.20.4
Summary of Significant Accounting Policies (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Allowance for Doubtful Accounts Receivable, Current $ 17 $ 18  
Provision for Doubtful Accounts 61 56 $ 68
Accounts Receivable, Allowance for Credit Loss, Writeoff 62 59 60
Marketable equity securities 266 353  
Property, Plant and Equipment, Gross 4,017 3,780  
Depreciation 268 271 $ 251
Interest Costs Capitalized 19 17  
Liberty SiriusXM Group      
Property, Plant and Equipment, Gross 2,842 2,686  
Braves Group      
Property, Plant and Equipment, Gross 977 923  
Formula One Group      
Property, Plant and Equipment, Gross 198 171  
Land      
Property, Plant and Equipment, Gross 139 138  
Building and Improvements      
Property, Plant and Equipment, Gross 836 783  
Support Equipment      
Property, Plant and Equipment, Gross $ 748 630  
Satellite system      
Property, Plant and Equipment, Useful Life 15 years    
Property, Plant and Equipment, Gross $ 1,709 1,694  
Construction in Progress      
Property, Plant and Equipment, Gross $ 585 $ 535  
Minimum | Building and Improvements      
Property, Plant and Equipment, Useful Life 10 years    
Minimum | Support Equipment      
Property, Plant and Equipment, Useful Life 3 years    
Maximum | Building and Improvements      
Property, Plant and Equipment, Useful Life 40 years    
Maximum | Support Equipment      
Property, Plant and Equipment, Useful Life 20 years