Equity method investments - Summary of earnings and distributions received from equity method investments (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Schedule of Equity Method Investments [Line Items]
Equity in Earnings	$ 252	$ 511	$ 745	$ 1,199
Distributions Received	199	187	374	342
Kraft Heinz [Member]
Schedule of Equity Method Investments [Line Items]
Equity in Earnings	27	265	242	487
Distributions Received	130	130	260	260
Occidental [Member]
Schedule of Equity Method Investments [Line Items]
Equity in Earnings	200	234	463	604
Distributions Received	55	36	96	61
Other [Member]
Schedule of Equity Method Investments [Line Items]
Equity in Earnings	25	12	40	108
Distributions Received	$ 14	$ 21	$ 18	$ 21

Amount of income (loss) for proportionate share of equity method investee's income (loss).

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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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