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Goodwill - Summary of Changes in the Carrying Amount of Goodwill by Segment (Detail) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Goodwill [Line Items]        
Beginning balance [1]     $ 20,040  
Goodwill acquired     12  
Goodwill impairment $ (745) $ 0 (745) $ 0
Translation differences     (470)  
Ending balance [1] 18,837   18,837  
North America [Member]        
Goodwill [Line Items]        
Beginning balance [1]     6,474  
Translation differences     (4)  
Ending balance [1] 6,470   6,470  
Europe [Member]        
Goodwill [Line Items]        
Beginning balance [1]     8,544  
Translation differences     (320)  
Ending balance [1] 8,224   8,224  
International Markets [Member]        
Goodwill [Line Items]        
Beginning balance [1]     2,328  
Goodwill impairment     (479)  
Translation differences     (16)  
Ending balance [1] 1,833   1,833  
Other [Member]        
Goodwill [Line Items]        
Beginning balance [1]     2,694  
Goodwill acquired     12  
Goodwill impairment     (266)  
Translation differences     (130)  
Ending balance [1] $ 2,310   $ 2,310  
[1] Accumulated goodwill impairment as of June 30, 2022 and December 31, 2021 was approximately $26.3 billion and $25.6 billion, respectively.