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Equity method investments - Summary of earnings and distributions received from equity method investments (Detail) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Schedule of Equity Method Investments [Line Items]
Equity in Earnings		$ 330	$ 222	$ (4,289)	$ 967
Distributions Received		228	205	646	579
Kraft Heinz [Member]
Schedule of Equity Method Investments [Line Items]
Equity in Earnings	[1]	225	(78)	(4,571)	164
Distributions Received	[1]	131	131	391	391
Occidental [Member]
Schedule of Equity Method Investments [Line Items]
Equity in Earnings	[1]	77	277	211	740
Distributions Received	[1]	63	55	183	151
Berkadia [Member]
Schedule of Equity Method Investments [Line Items]
Equity in Earnings		28	23	71	63
Distributions Received		$ 34	$ 19	$ 72	$ 37
[1] We report our equity in Occidental’s earnings on a one-quarter lag and, as indicated below, in the second quarter of 2025, we began reporting our equity in Kraft Heinz’s earnings on a one-quarter lag.

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