Intangible Assets - Schedule of Intangible Assets by Major Class (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Finite Lived Intangible Assets [Line Items]
Gross Book Value	$ 5,283	$ 9,676
Accumulated Amortization	1,828	2,587
Net Book Value	3,455	7,089
Customer Relationships
Finite Lived Intangible Assets [Line Items]
Gross Book Value	1,744	3,779
Accumulated Amortization	485	868
Net Book Value	1,259	2,911
Technology/Technical Know-How
Finite Lived Intangible Assets [Line Items]
Gross Book Value	1,284	2,498
Accumulated Amortization	488	779
Net Book Value	796	1,719
Tradenames
Finite Lived Intangible Assets [Line Items]
Gross Book Value	767	1,885
Accumulated Amortization	166	264
Net Book Value	601	1,621
Other
Finite Lived Intangible Assets [Line Items]
Gross Book Value	1,488	1,514
Accumulated Amortization	689	676
Net Book Value	$ 799	$ 838