Equity Method Investments - Summary of carrying value and fair value of investments (Detail) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Schedule of Equity Method Investments [Line Items]
Carrying Value	$ 31,134	$ 29,066
Kraft Heinz [Member]
Schedule of Equity Method Investments [Line Items]
Carrying Value	13,395	13,230
Fair Value	9,994	12,035
Occidental [Member]
Schedule of Equity Method Investments [Line Items]
Carrying Value	17,287	15,410
Fair Value	13,053	14,552
Other [Member]
Schedule of Equity Method Investments [Line Items]
Carrying Value	$ 452	$ 426