Other assets impairments, restructuring and other items - Components of Restructuring Costs (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 58	$ 29	$ 121	$ 196
Employee termination
Restructuring Cost and Reserve [Line Items]
Restructuring charges	57	28	116	191
Other
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 1	$ 1	$ 5	$ 5

- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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