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Intangible Assets - Schedule of Intangible Assets by Major Class (Detail) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Finite Lived Intangible Assets [Line Items]    
Gross Book Value $ 8,140 $ 8,122
Accumulated Amortization 3,239 3,134
Net Book Value 4,901 4,988
Customer relationships    
Finite Lived Intangible Assets [Line Items]    
Gross Book Value 2,781 2,783
Accumulated Amortization 878 849
Net Book Value 1,903 1,934
Technology/technical know-how    
Finite Lived Intangible Assets [Line Items]    
Gross Book Value 2,657 2,635
Accumulated Amortization 1,036 998
Net Book Value 1,621 1,637
Tradenames    
Finite Lived Intangible Assets [Line Items]    
Gross Book Value 1,067 1,067
Accumulated Amortization 295 283
Net Book Value 772 784
Other    
Finite Lived Intangible Assets [Line Items]    
Gross Book Value 1,635 1,637
Accumulated Amortization 1,030 1,004
Net Book Value $ 605 $ 633