Other assets impairments, restructuring and other items - Additional Information (Detail) - USD ($) $ in Millions		3 Months Ended			12 Months Ended
		Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2021
Restructuring and Impairment Costs [Line Items]
Impairments of long-lived tangible assets	[1]	$ 48	$ 75
Impairments of property, plant and equipment		48
Restructuring costs		81	39
Business combination contingent consideration arrangements change in amount of contingent consideration liability		$ 3	6
Scenario, Forecast [Member]
Restructuring and Impairment Costs [Line Items]
Expected revenue from Florida manufacturing plant in 2020					$ 125
Restructuring Cost [Member]
Restructuring and Impairment Costs [Line Items]
Business combination contingent consideration arrangements change in amount of contingent consideration liability			$ (3)	$ 6

[1] Including impairments related to exit and disposal activities