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Accounts Receivable (Tables)
12 Months Ended
Dec. 31, 2019
Receivables [Abstract]  
Schedule of Accounts Receivable
 
As of December 31,
 
 
2018
 
 
2019
 
 
2019
 
 
RMB
 
 
RMB
 
 
US$
 
 
(In millions)
 
Accounts receivable
   
6,614
     
8,344
     
1,198
 
Allowance for doubtful accounts
   
(599
)    
(928
)    
(133
)
                         
   
6,015
     
7,416
     
1,065
 
                         
Movements in Allowance for Doubtful Accounts Balance
The movements in the allowance for doubtful accounts were as follows:
 
2017
 
 
2018
 
 
2019
 
 
2019
 
 
RMB
 
 
RMB
 
 
RMB
 
 
US$
 
 
(In millions)
 
Balance as of January 1
   
177
     
316
     
599
     
86
 
Amounts charged to expenses
   
190
     
299
     
331
     
47
 
Amounts written off
   
(51
)    
(16
)    
(2
)    
 
                                 
Balance as of December 31
   
316
     
599
     
928
     
133