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Equity method investments - Summary of carrying value and fair value of investments (Detail) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Schedule of Equity Method Investments [Line Items]
Carrying Value	$ 25,524	$ 31,134
Kraft Heinz [Member]
Schedule of Equity Method Investments [Line Items]
Carrying Value	8,605	13,395
Fair Value	8,480	9,994
Occidental [Member]
Schedule of Equity Method Investments [Line Items]
Carrying Value	16,468	17,287
Fair Value	12,518	13,053
Berkadia [Member]
Schedule of Equity Method Investments [Line Items]
Carrying Value	$ 451	$ 452

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- Definition

This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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Fair value portion of investments accounted under the equity method.

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