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 credit losses $ 33 $ 25  
Customer invoices period 30 days    
Maximum invested cash maturity period 18 months    
Maximum security maturity period 3 years    
Total property and equipment $ 255 254  
Foreign currency exchange gain (loss) $ 4 (3) $ (6)
Minimum      
Short-term investments term 90 days    
Long-term investments term 12 months    
Maximum      
Short-term investments term 12 months    
Finance lease right-of-use assets      
Total property and equipment $ 114 114  
Leasehold improvements      
Total property and equipment 49 49  
Computer equipment and purchased software      
Total property and equipment 71 70  
Furniture, office equipment and other      
Total property and equipment $ 21 $ 21  
Computer Equipment, Furniture, Office Equipment and Other | Minimum      
Property estimated useful life 3 years    
Computer Equipment, Furniture, Office Equipment and Other | Maximum      
Property estimated useful life 5 years