Quarterly report pursuant to Section 13 or 15(d)

Recent Accounting Pronouncements - Stock-Based Compensation (Details)

v3.10.0.1
Recent Accounting Pronouncements - Stock-Based Compensation (Details) - USD ($)
$ in Millions
Sep. 30, 2018
Jan. 01, 2018
Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Equity $ 22,369   $ 22,574
Retained earnings 13,684 $ 13,122 13,081
Noncontrolling interests in equity of subsidiaries $ 5,509 5,635 $ 5,631
New Accounting Pronouncement, Early Adoption      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Retained earnings   (3)  
Noncontrolling interests in equity of subsidiaries   (1)  
SIRIUS XM | New Accounting Pronouncement, Early Adoption      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Retained earnings   $ (4)