Restructuring and Other - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Restructuring Cost And Reserve [Line Items]
Employee termination expenses and losses	$ 50	$ 37
Loss incurred for closing certain facilities	37
Employee termination cash expenses paid		27
Expenses from restructuring energy generation and storage segment		55
Impairment loss		13
Settlement and legal expenses recognized		$ 30
IPR&D [Member] | Energy Generation and Storage [Member]
Restructuring Cost And Reserve [Line Items]
Indefinite-lived intangible assets, impairment	47
Impairment on related equipment	$ 15