Annual report pursuant to Section 13 and 15(d)

Income Taxes - Tax Effects And Reconciliation Of Unrecognized Tax Benefits (Details)

v3.8.0.1
Income Taxes - Tax Effects And Reconciliation Of Unrecognized Tax Benefits (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Deferred Income Taxes and Tax Credits [Abstract]      
Net operating and capital loss carryforwards $ 1,017 $ 1,381  
Accrued stock compensation 88 136  
Other accrued liabilities 175 102  
Deferred revenue 502 761  
Deferred Tax Asset Discount on debt 26    
Other future deductible amounts 22 20  
Deferred tax assets 1,830 2,400  
Valuation allowance (112) (50)  
Net deferred tax assets 1,718 2,350  
Investments 110 81  
Fixed assets 326 330  
Intangible assets 2,760 3,961  
Discount on debt   3  
Deferred tax liabilities 3,196 4,375  
Net deferred tax liabilities 1,478 2,025  
Valuation Allowances and Reserves, Period Increase (Decrease) 62    
Income Tax Uncertainties [Abstract]      
Unrecognized Tax Benefits, Beginning Balance 304 254 $ 2
Reduction for tax positions of prior years (1) (1)  
Increase in tax positions for current year 16 51  
Increase in tax positions from prior years 37   252
Decrease due to Settlements With Taxing Authorities (423)    
Increase in tax positions from acquisition 432    
Unrecognized Tax Benefits, Ending Balance 365 $ 304 $ 254
Unrecognized Tax Benefits that Would Impact Effective Tax Rate 257    
Unrecognized Tax Benefits Allowance 365    
Formula 1      
Deferred Income Taxes and Tax Credits [Abstract]      
Valuation Allowances and Reserves, Period Increase (Decrease) 274    
Maximum      
Income Tax Uncertainties [Abstract]      
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued 1    
SIRIUS XM      
Deferred Income Taxes and Tax Credits [Abstract]      
Net operating and capital loss carryforwards 415    
Operating Loss Carryforwards $ 1,977