Goodwill and Other Intangible Assets, Net - Schedule of Other Intangible Assets, Net (Detail) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Total carrying value	$ 12,459	$ 3,432
Total accumulated amortization	(807)	(705)
Other intangible assets, net	11,652	2,727
Other Intangible Assets, Net	11,652	2,727
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Total carrying value	9,397	2,728
Total accumulated amortization	(500)	(470)
Trade names & patents
Finite-Lived Intangible Assets [Line Items]
Total carrying value	453	187
Total accumulated amortization	(126)	(38)
Technological know-how
Finite-Lived Intangible Assets [Line Items]
Total carrying value	2,579	479
Total accumulated amortization	(154)	(168)
Other
Finite-Lived Intangible Assets [Line Items]
Total carrying value	30	38
Total accumulated amortization	$ (27)	$ (29)