v3.20.2
Segment Reporting and Information about Geographic Areas - Schedule of Revenues by Geographic Area (Detail) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Revenues from External Customers and Long-Lived Assets [Line Items]        
Revenues $ 8,771 $ 6,303 $ 20,792 $ 17,194
United States [Member]        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Revenues 4,215 3,127 10,073 8,937
China [Member]        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Revenues 1,744 669 4,044 2,138
Other [Member]        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Revenues $ 2,812 $ 2,507 $ 6,675 $ 6,119