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Goodwill - Summary of Changes in the Carrying Amount of Goodwill by Segment (Detail)
$ in Millions
 3 Months Ended
Mar. 31, 2022
USD ($)
Goodwill [Line Items]  
Beginning balance $ 20,040 [1]
Goodwill acquired 12
Translation differences (66)
Ending balance 19,986 [1]
North America [Member]  
Goodwill [Line Items]  
Beginning balance 6,474 [1]
Translation differences 9
Ending balance 6,483 [1]
Europe [Member]  
Goodwill [Line Items]  
Beginning balance 8,544 [1]
Translation differences (85)
Ending balance 8,459 [1]
International Markets [Member]  
Goodwill [Line Items]  
Beginning balance 2,328 [1]
Translation differences 34
Ending balance 2,362 [1]
Other [Member]  
Goodwill [Line Items]  
Beginning balance 2,694 [1]
Goodwill acquired 12
Translation differences (24)
Ending balance $ 2,682 [1]
[1] Accumulated goodwill impairment as of March 31, 2022 and December 31, 2021 was approximately $25.6 billion.