Intangible Assets - Schedule of Intangible Assets by Major Class (Detail) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Finite Lived Intangible Assets [Line Items]
Gross Book Value	$ 5,275	$ 5,283
Accumulated Amortization	1,964	1,828
Net Book Value	3,311	3,455
Customer Relationships
Finite Lived Intangible Assets [Line Items]
Gross Book Value	1,691	1,744
Accumulated Amortization	510	485
Net Book Value	1,181	1,259
Technology/Technical Know-How
Finite Lived Intangible Assets [Line Items]
Gross Book Value	1,294	1,284
Accumulated Amortization	540	488
Net Book Value	754	796
Tradenames
Finite Lived Intangible Assets [Line Items]
Gross Book Value	767	767
Accumulated Amortization	182	166
Net Book Value	585	601
Other
Finite Lived Intangible Assets [Line Items]
Gross Book Value	1,523	1,488
Accumulated Amortization	732	689
Net Book Value	$ 791	$ 799