Intangible Assets - Schedule of Intangible Assets by Major Class (Detail) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Finite Lived Intangible Assets [Line Items]
Gross Book Value	$ 5,281	$ 5,283
Accumulated Amortization	2,016	1,828
Net Book Value	3,265	3,455
Customer Relationships
Finite Lived Intangible Assets [Line Items]
Gross Book Value	1,690	1,744
Accumulated Amortization	530	485
Net Book Value	1,160	1,259
Technology/Technical Know-How
Finite Lived Intangible Assets [Line Items]
Gross Book Value	1,273	1,284
Accumulated Amortization	545	488
Net Book Value	728	796
Tradenames
Finite Lived Intangible Assets [Line Items]
Gross Book Value	767	767
Accumulated Amortization	190	166
Net Book Value	577	601
Other
Finite Lived Intangible Assets [Line Items]
Gross Book Value	1,551	1,488
Accumulated Amortization	751	689
Net Book Value	$ 800	$ 799