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Goodwill and Other Intangible Assets, Net - Schedule of Other Intangible Assets, Net (Detail) - USD ($)
$ in Millions
Sep. 30, 2021
Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]    
Total carrying value $ 12,130 $ 3,432
Total accumulated amortization (1,171) (705)
Other intangible assets, net 10,959 2,727
Other Intangible Assets, Net 10,959 2,727
Customer relationships    
Finite-Lived Intangible Assets [Line Items]    
Total carrying value 9,203 2,728
Total accumulated amortization (754) (470)
Trade names & patents    
Finite-Lived Intangible Assets [Line Items]    
Total carrying value 387 187
Total accumulated amortization (94) (38)
Technological know-how    
Finite-Lived Intangible Assets [Line Items]    
Total carrying value 2,489 479
Total accumulated amortization (288) (168)
Other    
Finite-Lived Intangible Assets [Line Items]    
Total carrying value 51 38
Total accumulated amortization $ (35) $ (29)